Are the max yield and the yield efficiency numbers mixed up?
The reason I ask is I wonder if the carbon could be used as a soil amendment to help replenish top soils in agriculture, or as a growing medium generally. But this would only be conceivable if it's just carbon.
Things like crystallization reactions will produce very pure products, some other reactions will absorb more contaminants.
If you collect the pollutants before emitting them and turn them into stable products, you aren't polluting.
Ergo, clean.
PaulHoule•1h ago
https://www.aga.org/its-time-to-pay-attention-to-turquoise-h...
in contrast to "Grey Hydrogen" [1] made by steam reforming
https://en.wikipedia.org/wiki/Steam_reforming
The self-taught ChemE in me worries a little about any process that makes a solid product since that product could plate out inside the machine and clog it up, but maybe that's not really a problem here.
[1] "Blue" if you capture the CO2
westurner•1h ago
Now that there's a scholarly article describing creation of air filters and CO2 filters out of graphene, CO2 capture that yields high carbon graphene wafers would also be useful to feed to a pyrolysis reactor that feeds to CVD.
The model indicated that CVD from pyrolysis of cellulose biofeedstock would yield 33% metallic CNTs and 67% non-metallic CNTs, which are semiconducting.
In this concept design at present, I have Lignin and Phytic acid to contain the Carbon Nanotubes so that the CNTs are not hazardous to life if they enter soil or water or are burnt.
A research question for basic research with real world applications:
If lignin is not enough to make the inflamed CNTs char instead of ~aerosolize, is the phosphorous in phytic acid would encase the CNT in phosphorus and char.
This is apparently already an issue because CNTs are added to various products - like synthetic tires - and the CNTs are ~aerosolized if burnt.
For safety in a production process, this model (Gemini3Pro) suggests that all-liquid low-pressure lower-tempetature processing of CNT would help to minimize risk.