Conversion of Syngas from Entrained Flow Gasification of Biogenic Residues with Clostridium carboxidivorans and Clostridium autoethanogenum

Synthesis gas fermentation is a microbial process, which uses anaerobic bacteria to convert CO-rich gases organic acids and alcohols thus presents promising technology for the sustainable production of fuels platform chemicals from renewable sources. Clostridium carboxidivorans autoethanogenum are two acetogenic bacteria, have shown their high potential these processes by tolerance toward CO in industrially relevant products such as ethanol, 1-butanol, 1-hexanol, 2,3-butanediol. A approach coupling gasification biogenic residues with syngas process. This study investigated batch C. fully controlled stirred-tank bioreactors continuous gassing produced an autothermal entrained flow gasifier on pilot scale >1200 °C. They were then compared results artificial mixtures pure gases. Because contained 2459 ppm O2 bottling process after torrefied wood subsequent cleaning reducing CH4, NH3, H2S, NOX, HCN concentrations, oxygen was reduced 259 Pd catalyst before entering bioreactor. The performance bioreactor purified identical mixture CO, CO2, H2, N2 within estimation error. alcohol even improved reference corresponding mixture. Both acetogens proven successful syngas, but full carbon conversion ethanol challenging syngas.