The rapid deployment of behind-the-meter natural gas power for data centers is creating a massive, previously overlooked climate risk due to methane emissions. Olya Erzak of Frost Methane explains that methane—28 to 84 times more potent than CO2 over short-term horizons—emerges at every stage of the gas value chain: from upstream wellheads and midstream pipelines to unburnt "slippage" in reciprocating engines. A 50-gigawatt expansion could add 380 megatons of CO2e annually, with 40–50% of that being preventable through better sourcing, equipment choices, and operational practices. Key mitigation strategies include buying from low-leak basins, using fuel cells or turbines instead of reciprocating engines, avoiding partial loads, and installing catalytic converters to oxidize methane in exhaust. Despite the scale, these solutions are cost-effective, adding no more than a small percentage to capital spending and not delaying project timelines. Current emissions accounting is widely underestimating methane, especially due to reliance on averages and lack of technical expertise. A systemic shift—driven by industry standards, supplier incentives, and demand—could not only reduce data center emissions but also improve methane management across the broader natural gas sector. This underscores the urgent need for standardized methane reporting, better supplier oversight, and early adoption of emission-reducing technologies, setting a precedent for cleaner energy deployment in high-growth sectors.
Latitude Media, covering the new frontiers of the energy transition.
I'm Shail Khan, I lead early stage investments at Energy Impact Partners.
Welcome to Catalyst.
So let's take one thing as a given, behind the meter gas generation for data centers
is happening.
Interconnection queues run for years, the hyperscalers and frontier labs aren't waiting,
and on-site gas is often the fastest route to firm power at scale, at least today.
Undeniably, tens of gigawatts are coming in the next couple of years alone, and who
knows how much in the long term.
So it isn't really a question of whether it's going to get built, it is a question of how.
The emissions story that most people think about for natural gas is about CO2, what happens
when you combust the fuel.
But an equivalent variable is the methane that actually never gets burned.
There are some leaks at the wellhead, some leaks at the generation site, some slips unburned
out of the exhaust.
There are also leaks at the cost of the generator, depending on the kind of generator.
And if you add those up, at least by the math of my guest today, then an on-site gas plant
looks actually kind of like a coal plant from a holistic emissions perspective.
In aggregate, we're talking about adding annual emissions just from these behind the
meter assets that could look like all of global aviation, for example.
But make different choices on sourcing and monitoring some equipment, some efficiency,
and that same plant lands closer to average grid.
So, what does it take, and is it realistic?
That's the same fuel and the same megawatts, with roughly a 2x swing in emissions.
So what does it take, and is it realistic?
Olya Erzak is the founder and CEO of Frost Methane.
She's mapped out where the methane comes from in an on-site gas data center, and which
levers actually move it.
She's coming up next.
Olya Erzak: Demand flexibility is now an essential
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Oh, yeah.
Welcome.
Thanks, Shael.
Okay.
So I think our listeners probably have some general sense of this, but not nearly as much
knowledge as you do about it.
So in brief, why should we care about methane?
So everybody knows that it's 28 times more potent than CO2 over the 100-year terms and
84 times more potent over the 20-year terms.
What people don't know as much about is that today, it accounts for 30 percent of the warming
that we currently experience.
Also, it has pretty major air quality issues.
So 850.5 percent.
Yeah.
And 850,000 premature deaths every year and 860 million crop loss, and this is because
methane is a precursor to ground-level smog.
Okay.
So suffice to say, we care about methane, and it just so happens that we in the United
States mostly, but in other countries as well, to some extent, are on the precipice of building
kind of an enormous number of data centers that are powered by onsite natural gas generation,
of one kind or another.
And you've done a bunch of interesting analysis on methane emissions that might come from
that and then how to mitigate them.
Let's start with like walking through where those emissions would emanate from.
There's multiple stages.
So kind of walk me through end-to-end, like where do you get methane emissions from in
the full value chain of a behind-the-meter gas-powered data center?
Yeah.
So, you know, data centers are building this natural gas capacity because it takes too
long to interconnect to the grid.
And so first, you need to actually extract that natural gas.
So let's say your data center is, hypothetically speaking, located in Texas.
You're getting your natural gas from the Permian Basin.
And so the two sources of leak there are upstream, right, so the wellhead, and then midstream,
the gathering pipes that take it from the wellhead to the processing unit within the
basin.
So between those two things, 4% of production is lost.
So that is very significant.
That's a significant amount of methane that really could be powering more data centers
instead of going into the atmosphere.
The long-distance transmission pipelines are mostly fine, right?
So that's like has negligible amount of leaks.
So that's not something that people should be worrying about.
Then you have leaks at the actual facility level, right?
And then finally, there's what's called methane slippage.
So for anybody that's using reciprocating engines as their generators, as opposed to
like turbines or combined cycles or fuel cells.
You have very significant amount of methane that slips from the exhaust unburnt.
So those are the four things that people should be paying particular attention to.
Okay.
And you said 4% on the extraction leak side, that's presumably average across the Permian.
There's pretty wide variability, right?
Exactly.
So you have on the upstream side, the best players are probably leaking like 0.2% of
their production.
And of course, the worst are, you know, at least double the average.
And then on the gathering pipes, that's a little bit more tricky because you don't always
control which gathering pipes you're in.
So you have to put together both the upstream and the less leaky gathering pipes within
that.
And there's huge basin-to-basin variation as well, right?
Like the Permian Basin, San Joaquin in New Mexico, like the Uinta Basin, those are particularly
high leakage.
But if you're saying getting it from Pennsylvania, from the Marcellus, that's pretty high leakage.
So that's a much, much lower leakage rate for both the wellheads and the gathering pipes.
So basin-to-basin variation and player-to-player variation.
And we'll come back to that in the how do we mitigate it piece.
But just to put numbers to each step of the value chain.
So the average of 4% across the Permian on the extraction side, orient me numerically
on like the facility leaks and the potential methane slip at the generator.
Yes.
So let's start with the methane slip in the generator because that data set is pretty
good.
So this data set is pretty good.
I think it's better.
For four-stroke lean burn engine, the EPA average when it's running at full capacity is 3% of
the methane coming in, slips out the back unburnt.
If you're running it at partial load, that can be significantly, significantly higher,
right?
I've seen measurements up to 12% on that.
On the facility leaks, that is probably the weakest from a data set standpoint, because
we can't say that these are the same as utility scales.
Right.
Right.
We can't say that these are the same as utility scale facility leaks, right?
When you are building a gigawatt power plant for utility, you've got two turbines and like
a second stage, right?
All in the same building right next to each other.
Some of these data centers that are getting built right now are doing 35 reciprocating
engines sprawled across a pretty large area in order to generate that same gigawatt.
So that means that the amount of piping and welds and connections that you have goes up
quite a bit.
And therefore, the leaks also go up quite a bit.
So there, we can make an estimate and what we're seeing from satellite looks not so great
for some players.
Right.
I mean, can you say more about that actually?
How much fidelity is there in all of this data and why?
The data, well, the data for methane slips, reciprocating engines and turbines
and fuel cells and all of that, that is really quite well understood, right?
There's newer models.
Typically, the manufacturer will.
Have methane slip is just part of their data sheet at full load.
But when you're running a partial load, that's where you typically don't get a characterization
from the manufacturer.
And that's where it goes up quite a bit, right?
You also see it on the efficiency drop.
So that is pretty solid.
The basin leaks, like those have been done depending on the specific basin, but there's
been a lot of flyovers, flyover campaigns with methane sensors that, you know, as well
as satellite observations that I think are all pretty good.
Sometimes they're a couple of years out of date, but lots of pretty accurate data there.
And facilities, because of, you know, availability of shortages of equipment, they're being built
in pretty bespoke ways.
So you see a lot of variation there.
I'm curious on the extraction leak side, is the trend line positive or negative?
In other words, like, are we getting better and better over time at minimizing leakage?
At the wellhead?
Or is it, or is it the opposite direction?
Hmm. Great question. I think the best study I've seen on this was from RMI. There was a
curious but very logical study that showed that there's some variation based on
basically gas and gas prices, right? So natural gas prices go up. The extractors are willing to
spend more money to have people doing more frequent inspections. For example, prices go down,
all of a sudden your expensive person doing inspection isn't worth the amount of gas that
you, the extra gas that you can sell if you prevent a leak. And so there's a little bit of
that correlation that RMI found. But in general, like I think New Mexico had a big improvement
recently. But other than that, I think the gas prices are the big ones, given that the like
potential EPA regulations did not end up coming in.
Interesting. Okay. So there are all these sources of methane leaks in the value chain.
Give us a sense, just like at the high level, using averages, obviously, how much might this,
how much total emissions might this add, given how much new behind the meter natural gas
capacity is being built or planned? Yeah. So we've done the calculation on
assuming that 50 gas is going to be built. And we've done the calculation on assuming that 50
gas is going to be built. And we've done the calculation on assuming that 50
gigawatts of new capacity is coming in. The latest reports are showing more like 75. And just for
context, California has 40 gigawatts of natural gas generation capacity installed. So this is,
you know, data centers are no longer a rounding error on our energy usage. Like that world is
gone. So assuming that 50 gigawatts, if we're assuming the 7.5% of methane ends up in the
atmosphere, which is what happens if you, you know, you're using a gas generator, you're using a
have some optimistic assumptions on facility leaks and, you know, the upstream, midstream and
engine slip. And in that case, we would add basically 380 megatons of CO2E to U.S. emissions
in the next 18 months for those 50 gigawatts to come online. So that's really quite significant.
And a lot of that is, or, you know, 40 to 50% of that is preventable if we,
you know, tackle the methane issue, right? So that's huge numbers.
And this is, this is, of course, not including the CO2 emissions from combustion
from the generators themselves.
The 380 includes the CO2 emissions.
Ah, okay. So how much of it is the CO2 of that 380? How much is the CO2 from combustion? How
much is from the methane upstream?
Depending on your assumption, between 50 and 60% is CO2 and between 40 and 50% is methane.
So there's another way to think about it, which is that like,
if people have been thinking about, okay, how much CO2 are we going to generate because we're
building all this new natural gas capacity, they've got roughly half the equation, actually.
It's the actual warming impact is basically double what they're imagining because there's
an equivalent warming effect amount from all the methane upstream of that.
Exactly. It's double if you use the 100-year equivalency. If you use the 20-year equivalency,
it's much, much worse than that. It ends up being like,
724 megatons of CO2e with, at that point, the majority being methane. So there's kind of a big
question of like, are we looking at a 100-year time horizon for warming or a 20? If a 20,
the methane completely dominates. If a 100, then yes, then it's double. So it might be even worse
depending on when you think we will start reducing our emissions.
Sticking, I guess, with the 380 megaton number, can you contextualize that a little bit?
You said it's a lot, but like, how much?
Yeah, fair point. So the preventable part, right? So let's call it 50%. That's 15% of US-grade
emissions is what we can prevent by building these data centers with tackling the methane in mind.
Right? So that's like the biggest climate in the next 18 months, right? It's not like we're
going to stop building the data centers afterwards. So this is like by far the
biggest climate lever that I ever had a chance to pull in my career. I don't know if you had 15
percent of electric grid lying on the ground in your career, but I'm like. I'd like to think so, but despite a long career in this space, I don't think I have.
Okay, so you said preventable. Let's talk about what it takes to prevent it.
And I guess it makes sense to probably similarly walk through the value chain,
because there's different things you have to do at each step in the value chain,
starting with the upstream wellhead stuff.
Exactly. So in the upstream wellheads, there are two things you can do. A, you can buy it
from a basin that has lower leaks, right? That obviously has a bunch of knock-on effects about
where you locate your data center or buying pipeline capacity to pipe the methane from
where it's produced to your data center. That is possible. But obviously extra pipeline capacity
buying that is involved. So there's one thing you could do. You could buy from the best player
within a given basin, right? So there is. You know, a set of certification, let's say MIQ from RMI is one of them, where the best players
in according to their certification leak like 0.2% of their production. And the additional
that those players charge for this like certified low leak natural gas is pretty low. Now we can
argue whether that's the best standard and how we can improve that standard and so on,
but directionally, this is correct, right? Essentially, the fact that there are
profitable companies, they can leak the methane and not leak the methane, that the inspections
roughly end up costing the same or something close to the additional revenue from the gas
means that it's very easy for the data center companies to tip everybody into the low leak
regime, right? Because we know it's possible there's existence proofs of the good players
that do this. And the good players, you know, the folks that leak less, you know, these aren't like
small companies, right? Like BP is one of the certified ones, for example, in the Permian basin.
So it's large supply that is available at the low leak rates. And the data center people together
get to essentially decide who drills the next hole in the Permian basin, right? And they can
make that decision, right? Because this is such significant amounts of natural gas that
especially if they got together and did a coalition for responsible gas buying or
something like that, you'd be able to, I think, shift the entire industry, not even just their
direct suppliers. I mean, starting with their direct suppliers to that regime. Midstream, I think
very, very similarly, right? That there are basins that have much lower leakage on that. So I think
just the attention to it and the demand and the slight, maybe slightly higher pricing, at least
at the beginning, would probably shift that pretty easily. We know how to keep pipes intact. We do
this over long distance gas transmission as well, right? It just has different regulations on it.
Right. I think, like, I understand why this is difficult, right? You have the hyperscalers that
have a subcontractor that has a subcontractor that has a subcontractor by the time somebody
welds anything, right? And so this is pretty difficult. And it's not that all of these people
are thinking heavily about methane leaks. And so this is something that needs to go down both in
the contracts and where there needs to be some certification and leaks are going to happen.
Yeah. I think that's a really good point. And so having leak detection and repair with really fast response is going to be key,
both for the climate and for the bottom line, because this is methane. At that point,
you've already paid for the methane. The methane that's leaking at the wellhead, those you haven't
paid for yet. So I think that's a really good point. And of course for safety, right? You have a bad, you have a bad, well, like that thing is ignitable.
You have one smoking colleague and that's not going to be good. This is pressurized gas. So
that's like, I think something that people should be pushing a lot harder on as far as
requirements for specific kinds of detection and response time. And then the last thing
is the methane slip, right? Pretty large number there. First, if you have availability of some,
of equivalent efficiency that isn't a reciprocating engine,
then you just get less, like, this is just not an issue for fuel cells or turbines or
combined cycle, if you can get it.
Is it an issue for like air derivative turbines or no?
I don't think so. But I could double check on those, but I don't think any turbines have this
issue. I think they all have much more complete combustion. And then for reciprocating engines,
you know, you have this issue. And so first of all, just don't run them as partial loads.
So I know a lot of folks out of like the best,
best of intentions are trying to match it to solar production. So shut off half of your
reciprocating engines instead of running all of them at partial load is something that people
can legitimately do, right? So the running at partial loads is surprisingly bad for methane
slip. And then, you know, just like you have a catalytic converter for your car,
you can oxidize methane at the, at the exhaust, right? There's catalysts,
there's regenerative thermal oxidizers, although those would need additional energy input at the
percentages that you get, and we can dive into the
options for either one of those things, but those are essentially your options for that.
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Honestly, you know, looking holistically at all of that stuff that you can do,
to me, it doesn't seem like it's that hard. It definitely doesn't seem like it's that expensive
relative to anything else that these data centers are spending money on, right? Like,
it should be doable. Exactly. I don't think it would add more than a percent to the cost of the
data center. And I don't think, more importantly, the question is, does it increase your time to
market, right? Like, time to flops? And the answer is, it doesn't, right? And all of these things,
like, even if you can't do it at that moment, do you leave the hook in to
put the catalyst into the exhaust to make it easier as soon as you can afford it or as soon
as the technology becomes available or the supply chain constraints are done? So those kind of,
like, hook-ins for later, people are just too constrained and are having too much of a race
to be thinking about anything kind of like that. And so that's why a third party like us is really
useful to be talking to all of these folks to say, look, here's the things that if you do it now
is going to be a lot cheaper later. Yeah. I mean, I know you've been out
talking to the hyperscalers about this and preaching the gospel of methane reduction at
data centers. I mean, I guess the first question is, like, have they been accounting for this
historically? Have they been, when they, you know, they do, like, pretty public emissions
accounting. Are they accounting for all this methane slippage? Not, mostly not correctly.
There are certain things like, like, people use a lot of country or even a lot of average
averages that may be really, really under-accounting it in a lot of places. And definitely what we're
seeing from satellite just does not match. So I think there's been a lot of under-accounting of
that by basically using averages. And, like, to their credit, though, it is unlikely that the
person that's doing the accounting has expertise about methane slip. Like, most, like, even data
center builders, not just the hyperscalers, all the way down, right, the number of people that
know what methane slip is.
Is tiny, right? And so I don't fault them for, you know, not having the technical expertise in
the different kinds of ways that you can generate electricity from methane. It's just, like,
hyper-specific. And so, but yeah, I do think that there will be a lot of accounting that would need
to get adjusted, especially once more of this comes online.
You know, if you could wave a magic wand, obviously you would have everybody go do all
the things. But to get there, like, what's the interim step in your mind?
Yeah, I mean, I think that some of these things are really cheap and easy and, like, available now,
right? And some of the stuff is just, like, some of the things which have, like, a money,
a safety, and a climate win are, like, a no-brainer. But really, because there's no
methane experts all the way down, it's really useful to just have a central party set the
standards, right? Kind of, like, LEED set the building ones, and we set the LEAK standards,
right? So I think that, like, is really useful to basically,
say, well, what should you be asking of your suppliers, right? And then once you show that
you care and that there's an influence to, like, who you choose as your supplier and how much you
pay them is related to their quantification and reduction plans for their methane, even if they
can't immediately do this because of the kind of race we're in, I think that gets us a lot of the
way in. I mean, you said, you know, even if they
can't do this immediately because of the race that we're in, like, there's an extent to which
I don't want to give them that pass. Because as you said, I think, look, as a practical matter,
you, speed to power is the most important thing right now. And there's so much money behind it
and so much momentum behind it. It's, you're, like, tilting at windmills to propose anything
that slows down speed to power. But if, as you're saying, none of these things would actually slow
a project down, they might add some fraction of a percentage of cost to that project. Let's
slow it down. If that is indeed true, then, like, what's the excuse?
Well, I think that's, I think that's fair. I think the question is maybe at, like, some larger scale,
like, at some point, are we going to run out of, like, certified low-leak natural gas producers?
Or at some point, do we hit shortages on the catalyst? And the catalyst for the methane
slip, like, that's not a solved problem. There are solutions, but they're, all of these solutions
will get a lot better with increased use, right? So there's definitely a scale.
But I think I'm, I'm, in general, I'm, I'm with you, but I don't know what influence we necessarily
have on those. I don't know if you're willing to, to name names, but, like, is anybody out in front
on this? Any of the hyperscalers? I mean, historically, if you look at, like, who, who's
been out in front on, you know, early renewable PPAs or 24-7 clean power, like, usually it was
Google, followed by Microsoft, followed by Meta and AWS behind them. Is it kind of a similar dynamic?
Here? Or is nobody out in front at this point?
I think I would be breaking some NDAs, if I were to say that. But there, there are definitely,
there is a big difference in the players. But yeah, sorry. Yes, but there's, there's definitely,
it's been very interesting to see the internal organizations of the various companies, right?
Like, who has how many sustainability people, whether having more sustainability people means
that you can move faster, or whether you can move faster, or whether you can move faster, or whether
you can move faster on this or not, like, all of these things have been, I think I understand a little bit more what management consultants do now after this experience, the internal structures and its influence on who can move how fast, and on what particular topics has been fascinating.
I guess to close out, I mean, you know, you said 380 megatons, plus or minus, of which half is avoidable through this set of measures, that leaves half.
Which is still 190 megatons, still a lot. What do you do about the other half?
What a great question. I mean, really, there's only two things that you can do, right? Like, you can capture the CO2 on site. I did the math on that, that would take about 15% of their energy. And we know that energy that isn't going to the flops is the one thing, currently, people aren't willing to give up. So I think that's going to be hard. The other thing you could do,
is pay to take out or prevent an equivalent amount of emissions somewhere else, right? So this is offsetting. And this is something that could be potentially done in the interim of, can you offset what you can't reduce? You know, of course, there is, can you combine it with more renewables? I think a lot of people are trying that. You know, can you combine it with a grid under certain circumstances? You know, that obviously still runs into the interconnection queue issues, which is why they filled the gas tank.
But I think using the gas less and less and less, and then offsetting, and then maybe eventually capturing when somehow the energy becomes available, and you're still using those, that might be another issue. The other thing that I would say is planning a little bit for the future in case these things continue to be around. So for example, none of them are planning to add a second stage later. And as far as
getting 50% more energy from exactly the same amount of gas, like that reduces
your emissions dramatically while also helping a lot on the energy availability and the money.
Those kinds of things, like people are now building structures which do not allow you
to add a second stage later when those second stages become available.
So I think that's like one of the biggest mistakes we're seeing people make.
And I think the one other thing, like I'll say, is I think if there was a massive shift
for the data center people to care about this problem, I think the benefits will go beyond
the data centers themselves, right?
If you can shift the entire oil and gas industry and eventually, as a result of that shift,
make more cheaper methane leak detection and response systems available and more deployed
at scale, right, that could be good for any usage of natural gas, not just the data centers.
And I think similarly, the catalyst for. For the slip, on the one hand, you know, we want to do that, like data centers are
the ones that have the margins to potentially pay that extra percent.
But over time, you can imagine that that could be applicable to any reciprocating engines,
just like we need to have a catalytic converter on our car.
This could now become a standard thing that you just buy and bolt on, as opposed to have
to like design a little bit more bespoke for each case.
So I think that it could move, like it could. Develop technologies that would move other industries into a better place because now
they're available without having to spend so much of your, so much extra.
Not to say that it's a lot in data center terms, but it is a lot for a lot of other
industries that wouldn't be able to foot some of the scale-up costs.
Well, yeah, this was really informative.
And I also very much appreciate that you were doing this work.
Like, I think I had an intuitive sense, but I had not seen prior to seeing what the work
that you've been doing, anything quantitative.
And just how much methane we are soon to emit in all likelihood, barring some change
because of all this behind-the-meter gas.
So thank you for that.
Thanks, Shale.
This was super fun.
Olya Urzak is the founder and CEO of Frost Methane.
This show is a production of Latitude Media.
You can head over to latitudemedia.com for links to today's topics.
This episode is produced by Max Savage-Levinson.
Mixing and theme song by Sean Marquand.
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I'm Shale Khan, and this is Catalyst.
Podcast Summary
Key Points:
Behind-the-meter natural gas plants for data centers are rapidly expanding due to long interconnection queues, creating significant methane emissions across the value chain.
Methane leaks occur at multiple stages—including wellheads, gathering pipelines, facility infrastructure, and unburnt "slippage" in reciprocating engines—contributing up to 380 megatons of CO2e annually if 50 gigawatts of new capacity is built.
Up to 50% of these emissions are preventable through better sourcing, leak detection, equipment upgrades, and operational changes such as avoiding partial loads on generators.
Methane is 28–84 times more potent than CO2 over 100–20 years, and current U.S. emissions from these data centers could be equivalent to a large portion of national emissions.
Data centers can significantly reduce emissions by shifting to low-leak natural gas basins, using certified low-emission suppliers, and adopting fuel cells or turbines instead of reciprocating engines.
Catalysts like catalytic converters for exhausts and improved leak detection systems can mitigate methane slip at low cost and with minimal time-to-market impact.
Hyperscalers have historically under-accounted for methane emissions due to lack of technical expertise, creating a critical need for standardized, transparent reporting and supplier accountability.
A systemic shift in the industry—driven by standards, demand, and cost efficiency—could reduce methane emissions across energy sectors, benefiting not just data centers but the broader natural gas supply chain.
Summary:
The rapid deployment of behind-the-meter natural gas power for data centers is creating a massive, previously overlooked climate risk due to methane emissions. Olya Erzak of Frost Methane explains that methane—28 to 84 times more potent than CO2 over short-term horizons—emerges at every stage of the gas value chain: from upstream wellheads and midstream pipelines to unburnt "slippage" in reciprocating engines. A 50-gigawatt expansion could add 380 megatons of CO2e annually, with 40–50% of that being preventable through better sourcing, equipment choices, and operational practices.
Key mitigation strategies include buying from low-leak basins, using fuel cells or turbines instead of reciprocating engines, avoiding partial loads, and installing catalytic converters to oxidize methane in exhaust. Despite the scale, these solutions are cost-effective, adding no more than a small percentage to capital spending and not delaying project timelines. Current emissions accounting is widely underestimating methane, especially due to reliance on averages and lack of technical expertise.
A systemic shift—driven by industry standards, supplier incentives, and demand—could not only reduce data center emissions but also improve methane management across the broader natural gas sector. This underscores the urgent need for standardized methane reporting, better supplier oversight, and early adoption of emission-reducing technologies, setting a precedent for cleaner energy deployment in high-growth sectors.
FAQs
Methane emissions come from upstream wellheads, midstream gathering pipes, facility leaks, and methane slippage in generators—especially reciprocating engines running at partial load.
A 50-gigawatt rollout could add 380 megatons of CO2e annually, with up to 724 megatons if using a 20-year warming perspective where methane dominates.
Yes, reciprocating engines can have up to 12% methane slip at partial load, making it a major contributor to emissions, especially compared to turbines or fuel cells.
Yes—by sourcing low-leak natural gas, improving facility leak detection and repair, avoiding partial loads on engines, and using catalytic converters to oxidize methane in exhaust.
No—mitigation measures are relatively inexpensive, adding less than 1% to project costs and not delaying time to market.
Mostly not—many use average or outdated data, lacking technical expertise in methane slip and upstream leakage, leading to under-reporting.
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