Earlier quoted context omitted.
Can you elaborate how gasoline is 'dirty' if the outputs were converted back into the fuel via carbon neutral means? Such technology would make gasoline have no output, since the ouptuts would be reabsorbed. If anything, electric cars, due to the massive environmental damage due to rare earth mineral mining, would be more of an environmental disaster.
Every cycle has a 50% cost in renewable power. This is close to being carbon neutral, but it is not entirely. Its not a closed loop. You have a growing loss every cycle. Its digging yourself deeper every time.
Launch HN: Prometheus (YC W19) – Remove CO2 from Air and Turn It into Gasoline
191–200 of 589 posts
Re: Launch HN: Prometheus (YC W19) – Remove CO2 from Air and Turn It into Gasoline
#192Re: Launch HN: Prometheus (YC W19) – Remove CO2 from Air and Turn It into Gasoline
#193Earlier quoted context omitted.
The main thing that's turned me positive on "e-fuels" is that there's such a huge amount of petroleum that's used today in applications where we basically have no other options . Think stuff like big jets, or container ships. If you sit down and crunch the numbers for any non-carbon energy carrier, you either end up sinking the ship or with a fuel tank twice the size of the cargo.
Plastics! Zero-carbon plastics would be great. Pull CO2 from the air, mix with water and wind/solar elec and product bags, phones etc!
Re: Launch HN: Prometheus (YC W19) – Remove CO2 from Air and Turn It into Gasoline
#194Re: Launch HN: Prometheus (YC W19) – Remove CO2 from Air and Turn It into Gasoline
#195Earlier quoted context omitted.
I totally agree on skepticism. We are working hard to prove our economics. We are targeting selling renewable gasoline from the air for a profit next year. It will be much better for air quality too!
How will this improve the global average of air quality? If you are removing the CO2 from the air then reintroducing it back into the same environment (assuming it is not repurposed in another sector e.g. jet fuel, commercial containers) wont the net effect be the same? I understand this will concentrate the pollution significantly and may even reduce it in the short term, but wont the average effects be the same?
Re: Launch HN: Prometheus (YC W19) – Remove CO2 from Air and Turn It into Gasoline
#196Earlier quoted context omitted.
...the general fuel is going to be sold and re-burned means this is at best carbon neutral, so from a cynical environmentalist point of view, what's the point? This can't help anyone unless you pump the synth-gas into the ground and sequester it... The status quo today is that we are removing carbon from the ground and putting it into the air. This replaces those fuels that currently come out of the ground. It's stil…
An EV makes several times the motion from the same energy input. > Even electric vehicles aren't carbon neutral, because they're mostly charged by coal power.Even electric vehicles aren't carbon neutral, because they're mostly charged by coal power. Is thus an invalid/irrelevant argument. I can get excited about jet fuel however, since battery powered planes are considerably less practical than their traditional coun…
I assume the company is operating in the US. In the US only 27% of electricity is from coal and falling. https://www.eia.gov/electricity/monthly/epm_table_grapher.ph...
And in California (where nearly half of the US's electric vehicles reside--with EVs achieving a nearly 8% market share last year among light vehicles), it's MUCH less than that. There's only a single, tiny 63MW coal co-generation plant in the state, so coal power is less than 1% of California electricity.
> Even electric vehicles aren't carbon neutral, because they're mostly charged by coal power.
Additionally, it's absurd to compare two consumers of electricity, both of which are flexible with respect to time of consumption, and just arbitrarily say one is mostly coal power (which is false) and the other isn't.
We definitely need carbon neutral or even carbon negative industrial processes. I kind of question the logic of going for fuels versus more valuable non-fuel feedstocks, however. A maybe 50% efficient conversion of electricity to alcohols with a typical 20% energy conversion of fuels to mechanical power gives you about an order of magnitude less efficiency than battery-electric.
And if you ARE insistent on making carbon neutral fuels: Makes more sense to focus on things that are super hard to electrify, like long-haul aircraft and transoceanic shipping and maybe heating fuels for the far north (where air source heat pumps lose their effectiveness in January).
But I'm glad an electrochemical process is being developed, here. Electrolysis and related processes are much preferable, IMHO, than the more common thermal processes.
Re: Launch HN: Prometheus (YC W19) – Remove CO2 from Air and Turn It into Gasoline
#197Re: Launch HN: Prometheus (YC W19) – Remove CO2 from Air and Turn It into Gasoline
#198Would you be willing to share vague details of your roadmap? Specifically; How many barrels of ready to burn gasoline are you outputting per day in 6 months? 1 year? 3 years? The fact that the general fuel is going to be sold and re-burned means this is at best carbon neutral, so from a cynical environmentalist point of view, what's the point? This can't help anyone unless you pump the synth-gas into the ground and s…
This doesn't make sense to me? Wouldn't even the most cynical environmentalist agree that carbon neutral is much preferable to carbon positive?
Re: Launch HN: Prometheus (YC W19) – Remove CO2 from Air and Turn It into Gasoline
#199Earlier quoted context omitted.
If water is an input and not an output, that implies it's consumed, not left over.
I would think so, but the founder says: we have a carbon nanotube membrane that replaces it [distillation], extracting the alcohols from water This implies there is still water there. Maybe it was poor phrasing, and all of the water is consumed, but that isn't what is stated.