Agree with post above, thermal oxidizer design is a very specialized field. The performance of these sorts of devices is highly regulated for safety and air permitting.
If you're hoping to make steam or recover heat, I would suggest looking into recuperative thermal oxidizers. This is a style of...
I would echo the concern with fuel gas negatively impacting product quality. Fuel gas is generally high in H2S and other less than desirable components.
While it's great because it's free, it can be inconsistent in availability and pressure.
Alcohols (like ethanol) are generally not considered a good application for activated carbon. This is due to a low molecular weight, low boiling point and high vapor pressure. The adsorption of alcohols is highly dependent on relative humidity (moisture content) of the vapor stream. The higher...