Well, H2 is not nearly as good for cars as batteries, but truly green H2
(created through electrolysis) certainly can be very clean and could likely
be very useful in long range transport (ships, airplanes, and possibly long
range trucks).
It turns out that a recent analysis shows that "blue" H2, produced from
natural gas with carbon capture is not clean at all, but true green H2
(from electrolysis) should be very important in the future. So the
headline:
Hydrogen isn't green at all
is very, very wrong.
On Fri, Aug 13, 2021 at 12:31 AM Mark Abramowitz via EV <ev@lists.evdl.org>
wrote:
> Only looking at what you posted, you draw a very false conclusion from the
> data.
>
> You’ve connected fossil hydrogen with that going into a car’s tank. Well,
> yes, you can do that, much like you use fossil gas or coal to produce
> electricity to run a BEV. But most hydrogen in transportation is not
> fossil-derived, and the entire industry is moving towards 100%
> “decarbonized” hydrogen, with most believing that “green” hydrogen will be
> everywhere very soon.
>
> I haven’t looked at the “blue hydrogen” data, so can’t critique it, but
> the use of colors really confusing things because if you are looking for
> GHG impacts, the most direct measure is a CI score.
>
> Many incentives are there in transportation for 100% Renewable H2, and
> while I get 90% renewable hydrogen when I fill my fuel cell electric
> vehicle (they *are* electric), I look at the grid numbers and see renewable
> numbers of as low as 11%, depending on the time of day. The rest is fossil.
>
> So who is putting out more GHGs?
>
> This is the problem with analysis that don’t analyze the real world as
> most would view the data.
>
> - Mark
>
> Sent from my Fuel Cell powered iPhone
>
> > On Aug 12, 2021, at 2:20 PM, Peri Hartman via EV <ev@lists.evdl.org>
> wrote:
> >
> > For Many, Hydrogen Is the Fuel of the Future. New Research Raises
> Doubts.
> >
> https://www.nytimes.com/2021/08/12/climate/hydrogen-fuel-natural-gas-pollution.html
> >
> > ...
> > The main stumbling block: Most hydrogen used today is extracted from
> natural gas in a process that requires a lot of energy and emits vast
> amounts of carbon dioxide. Producing natural gas also releases methane, a
> particularly potent greenhouse gas.
> > ...
> > And while the natural gas industry has proposed capturing that carbon
> dioxide — creating what it promotes as emissions-free, “blue” hydrogen —
> even that fuel still emits more across its entire supply chain than simply
> burning natural gas, according to the paper, published Thursday in the
> Energy Science & Engineering journal by researchers from Cornell and
> Stanford Universities.
> > ...
> > The researchers assumed that 3.5 percent of the gas drilled from the
> ground leaks into the atmosphere, an assumption that draws on mounting
> research that has found that drilling for natural gas emits far more
> methane than previously known.
> >
> > They also took into account the natural gas required to power the carbon
> capture technology. In all, they found that the greenhouse gas footprint of
> blue hydrogen was more than 20 percent greater than burning natural gas or
> coal for heat.
> > ...
> > Jack Brouwer, director of the National Fuel Cell Research Center at the
> University of California, Irvine, said that hydrogen would ultimately need
> to be made using renewable energy to produce what the industry calls green
> hydrogen, which uses renewable energy to split water into its constituent
> parts, hydrogen and oxygen. That, he said, would eliminate the fossil and
> the methane leaks.
> > ...
> > Today, very little hydrogen is green, because the process involved —
> electrolyzing water to separate hydrogen atoms from oxygen — is hugely
> energy intensive. In most places, there simply isn’t enough renewable
> energy to produce vast amounts of green hydrogen. (Although if the world
> does start to produce excess renewable energy, converting it to hydrogen
> would be one way to store it.)
> > ...
> >
> > -----------
> >
> > I'm glad to see this published mainstream. People don't seem to think
> about the source for hydrogen, only about the the aspect of filling a tank
> in a few minutes and driving off. Long live EVs !!!
> >
> > Peri
> >
> > << Annoyed by leaf blowers ? https://quietcleanseattle.org/ >>
> >
> > _______________________________________________
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--
Larry Gales
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