Quote:
|
Originally Posted by joea
It's combustion of course it creates CO2 the point is it is supposed to be a closed circle. Pyrolysis is actually carbon negative compared to conventional biofuels. Well look at my post here:
http://www.subsim.com/radioroom/show...27&postcount=6
First gen biogas has a big disadvantage of competing for land with food crops, which is partly responsible for driving food prices up lately. Not good.
There is a new process called pyrolysis, actually an old method called slash and char used in Europe and apparently in the Amazon rain forest. Pyrolysis is the decomposition of organic materials by heating in the absence of oxygen. You can convert biomass or waste (even urban organic trash) into bio-oil and bio-char. Biochar is just charcoal bascially, inert and can increase the fertility of soils and ... serve as a carbon sink. So this is a carbon negative process. The bio-oil can be refined to make fuels, both for transport or heating (this is a good process on small scale for farms etc. as well as industrial) and as stock for plastics etc.
Check out the links in my post above. Pyrolysis is the way forward.  |
Pyrolysis looks promising. It would be better if no heating is required due to advent of new technology. At this moment, as what the word suggests, pyrolysis needs energy input to heat up and break down the waste to "biochar".
fermentation of manure and other waste produce methane and it is absolutely green if no additional inputs are required. Yet, methane is a greenhouse gas and it causes problem if leaked to environment. Hope that this problem can be eliminated as our technology improves