(2019) Journal of CO₂ Utilization_Livestock manure valorization to biochemicals and energy using CO₂ : A case study of goat excreta

Kim Y., Jeon Y.J., Yim J.-H., Jeong K.-H., Park Y.-K., Kim T., Lee J., Kwon E.E.

(Elsevier Ltd) Journal of CO2 Utilization ISSN: 22129820 Vol.30 Issue. Article No. DOI: 10.1016/j.jcou.2019.01.011

Furfural has been considered a potential feedstock of biofuels and biopolymers. As a waste-to-resource opportunity, this study focused on the valorization of goat excreta to obtain furfural and recover energy in the form of pyrolytic gas that helps increase thermochemical process efficiency. Three feedstocks (goat excreta, rice straw, and corncob) were compared to verify whether goat excreta is a promising feedstock of furfural. The furfural concentration from goat excreta (3.2 g L ^-1 ) via acid-catalyzed dehydration was comparable to that from rice straw or corncob. To maximize energy recovery from goat excreta via pyrolysis, CO₂ was employed as a reactive medium (compared with typical pyrolysis with N₂ ). This study experimentally proved that CO₂ plays a pivotal role in shifting carbon distribution from pyrolytic oil to pyrolytic gas, thereby enhancing the generation of CO (the main component of pyrolytic gas). Based on the experimental results, it is suggested that goat excreta can be a promising initial feedstock for the production of furfural and energy recovery. © 2019 Elsevier Ltd. All rights reserved.

This work was supported by the National Research Foundation of Korea ( NRF-2017R1D1A1B03028176 ).