Comment on Capturing CO2 With Copper, Scientists Generate 'Green Methane'
Tobberone@lemm.ee 2 months agoYou said it yourself. Still undiscovered. The technology we have today can’t be used to save more than a day or so of electricity. We need to handle months. Finding more energy dense ways of doing it is crucial.
And even if we burn it and put it back in the air, it is still positive, because we won’t have added more from oil. And if we get enough of the stuff we can let the trees grow, which would be a carbon sink.
Step 1: stop using oil. If we use the methane as is, we’ve accomplished this step. Step 2: scrub carbon from atmosphere. Upping the game and replacing wood for heating would let the trees scrub the atmosphere, creating carbon sinks Step 3: accelerate. Can processed methsne be stored in energy dense compounds? Like oil was?
Auzy@beehaw.org 2 months ago
That makes no sense…
Australia keeps less than 21 days of petrol of all types. Why would we need to store months? This seems like one of those silly arguments where it’s assumed incorrectly that the sun stops shining and the wind stops blowing (which only happens in limited locations).
And when I say including undiscovered, I mean its only getting better. For grid energy storage, energy density isn’t an issue. Energy density is ONLY an issue for transportation and phones. We just need to scale up the technology now, and thats already rapidly happening.
This entire thing comes down to efficiency at the end of the day. The efficiency of the conversion here is 85%, and you still need to convert it back into energy (which is hugely inefficient). Even if converting it back to energy is 75% efficient (it’s likely not), that’s only 64% efficient.
Batteries are 94%. Even Vanadium Redox Flow is 75-90%. There’s plenty of low density low cost efficient batteries (especially now Sodium batteries are available)
Also…
“If we use methane as is, we’ve accomplished this” - You can’t just swap current products with methane… Even if you did, petrol engines are totally inefficient. We’re likely talking not even talking 50% efficient
“Replacing wood for heating”. We already HAVE a solution for heating. Burning methane is less than 100% efficient max. Heat pumps are already at 500% efficiency and the efficiency is growing.
Why would you want to store it like oil? It’s incredibly toxic… And, burning it is inefficient.
This has it’s applications, but its likely more competing with Hydrogen, NOT batteries. Also, this is still a research paper, not a commercial product. By the time it’s commercial, batteries might be 50% cheaper again…
Tobberone@lemm.ee 2 months ago
Oh, you are aussie:) i should have guessed by your username.
Ok, for starters, where I live that big yellow thing stops shining. Practically (for electricity production anyways) for almost 6 months of the year and almost totally for 3. And even with heat pumps we still use several MWh of electricity every year to heat our homes. A battery park can keep a city running for 1h. Even those planned in NSW (BESS is it?) would struggle to keep things running for mire than a day. To be clear:
We need more energy storage than can be provided by electric batteries, than can be bought at battery prices and in scales larger than can be produced with any technology current or in the overseeable future. And we needed it yesterday. Any form of low cost, stable, easy to store solution we can use is a huge step forward. Solar is great! But we need the electricity when the sun doesn’t shine. Heat pumps are awesome! But their awesomness is needed when the sun doesn’t shine so much. That is why we need more energy storage solutions.
Summertime there are almost limitless electricity available, but that energy needs to be stored somehow. And with limitless (in practice) efficiency isn’t an issue. Even storing 1% is better than 0%. Regardless of efficiency.