In-depth exploration of mechanism and energy balance characteristics of an advanced continuous microwave pyrolysis coupled with carbon dioxide reforming technology to generate high-quality syngas.

This study firstly coupled advanced continuous microwave pyrolysis with CO reforming technology to recover syngas from cow manure and CO. The contribution of CO to syngas, pyrolysis mechanism, and energy balance characteristics were analyzed thoroughly. The results showed that continuous microwave pyrolysis coupled with CO reforming technology has superiorities over other pyrolysis methods in bio-gas generation. The bio-gas yield, syngas content, and heating value of syngas reached the maximum value of 71.02 wt%, 85.70 vol%, and 10.87 MJ/Nm, respectively. CO strengthened pyrolysis and reacted with pyrolysis products to produce high-quality syngas and reduce HS. Due to the limited substances that can react with CO and excessive energy consumption with increasing CO concentration, the utilization efficiencies of CO and energy decreased from 36.31% and 27.27% to 31.16% and 24.24%, respectively. This work provides basic theory and technical support for advanced technology to recover high-quality syngas from biomass with low energy consumption.