(2022) International Journal of Energy Research_Production of flammable gases from cattle manure via pyrolysis using CO₂ as an oxidant

Jung J.-M., Choi D., Jung S., Lin K.-Y.A., Tsang Y.F., Kwon E.E.

(John Wiley and Sons Ltd) International Journal of Energy Research ISSN: 0363907X Vol.46 Issue.5 Article No. DOI: 10.1002/er.7622

To valorize disposed animal manure into flammable gases, pyrolysis of cattle manure (CM) was investigated in this study. To make this process more efficient and environmentally benign, CO₂, a greenhouse gas, was harnessed as a reactive gas. In CO₂-assisted pyrolysis of CM, enhanced CO production was observed, compared to pyrolysis from inert condition (N₂). The gas-phase reactions between CO₂ and gaseous biocrude produced from CM thermolysis led to improved CO formation. In reference to the case of lignocellulosic biomass (rice straw), 5 times more CO production was observed from CM pyrolysis under CO₂. For an in-depth study of CO₂ functionality as an oxidant, the effects of operational parameters on syngas formation were considered. The key parameter to activate the functionality of CO₂ was temperature. These results offer that CO₂ and CM could be considered promising reactants to produce value-added syngas in line with mitigation of pollutant emissions through a pyrolysis platform. © 2021 John Wiley & Sons Ltd.

This work was carried out with the support of “Cooperative Research Program for Agriculture Science & Technology Development (Project title: CO2 Co-Feeding Catalytic Pyrolysis of Cattle Manure for Syngas Production, Project No. PJ01484402)” Rural Development Administration, Republic of Korea. This work was carried out with the support of “Cooperative Research Program for Agriculture Science & Technology Development (Project title: CO Co‐Feeding Catalytic Pyrolysis of Cattle Manure for Syngas Production, Project No. PJ01484402)” Rural Development Administration, Republic of Korea.