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Prometheus Fuels (YC W19) Closes Series B with $1.5B Valuation

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121–124 of 124 posts

Re: Prometheus Fuels (YC W19) Closes Series B with $1.5B Valuation

#121

Why convert methanol to gasoline when you can directly convert it into electricity using a reformer and HT-PEM fuelcell? https://www.advent.energy/advent-power-stacks/

Seems to me that directly selling methanol might be the way to go at first. It's an important industrial chemical in its own right.

Re: Prometheus Fuels (YC W19) Closes Series B with $1.5B Valuation

#122
post #54

Just so people are aware, Prometheus comes up every now and then among people on twitter following the climate tech space, and most think that their claims are bogus and completely unbelievable. Like they recently claimed that they can capture CO2 from the air with 36$, which is like 20-30 times lower than what current best tech can offer, and also lower than what people believe is generally possible. See some discus…

Prometheus's vision is very hard not to like. And, at the same time, there are likely good reasons to be skeptical. (I have very little expertise in this area myself.) FYI, I didn't find the tweets you've linked to to be convincing. One tweet criticizes prometheus because, at the time of the tweet, they had a P.O. box. The other suggests that 'the secret ingredient may be lies.' Now, maybe both tweet authors' critici…

> FYI, I didn't find the tweets you've linked to to be convincing.

To be clear, no, they're not convincing arguments. It's people who know this space and find the claims by prometheus so unbelievable that they make fun of them.

I was quoting this more to illustrate the tone of the discussion. The argument is ultimately: Prometheus makes claims about costs that are very hard to believe, and doesn't provide much evidence that they are true.

Re: Prometheus Fuels (YC W19) Closes Series B with $1.5B Valuation

#123

Hi everybody, I'm the founder of Prometheus. Happy to answer any questions!

What's the current density on the electrolyzers? Does the low concentration of CO2 impact it? What kind of air contactor do you plan to use?

I'm a big fan of what you are doing. If I weren't already working on fusion energy, this would be the technology I'd most like to work on. People forget that decarbonizing electricity is only 1/3 or 1/2 of the energy/fossil fuels problem. We need to find a way to turn massive amounts of renewable electricity into fuels and chemical feedstocks.

Re: Prometheus Fuels (YC W19) Closes Series B with $1.5B Valuation

#124
post #76

Earlier quoted context omitted.

I've often wondered if I could justify a crypto mining rig if I used the waste heat for something, literally anything, useful. The tech is interesting and I want to for the sake of "doing something cool" but the environmental cost has me iffy on ever trying.

Heat your house? https://www.newscientist.com/article/mg22530072-800-the-comp...

Earthship, heatpump, and this... getting pretty close to a dream house TBH.
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