(2018) Energy Conversion and Management_Biodiesel production from waste cooking oil using biochar derived from chicken manure as a porous media and catalyst

Jung J.-M., Oh J.-I., Baek K., Lee J., Kwon E.E.

(Elsevier Ltd) Energy Conversion and Management ISSN: 1968904 Vol.165 Issue. Article No. DOI: 10.1016/j.enconman.2018.03.096

In this study, we introduce a low-cost, efficient, porous catalytic material produced from chicken manure by pyrolysis (i.e., chicken manure biochar) for converting waste cooking oil into fatty acid methyl esters (FAME, i.e., biodiesel) via transesterification. Chicken manure can be pyrolysed at different temperatures (350, 450, 550, and 660 °C), and the properties of the resulting biochar are dependent on the temperature at which the biochar is made. The biochar in our study contained a large amount of inorganic compounds (mostly CaCO₃) that expedite the catalytic activity during the transesterification of waste cooking oil. Compared to SiO₂, the chicken manure biochar lowered the transesterification reaction temperature at which the highest FAME yield (95%) was achieved (350 °C). However, despite the catalytic effect of CaCO₃ in the chicken manure biochar, undesirable thermal cracking of FAME occurred. To avoid this, the mass ratio of silica to chicken manure biochar was optimised. The optimal mass ratio of silica to chicken manure biochar was found to be less than 0.8. This study suggests an environmentally benign biodiesel production process that recycles organic waste such as chicken manure. © 2018 Elsevier Ltd

This work was supported by the New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning ( KETEP ) granted financial resource from the Ministry of Trade, Industry & Energy , Republic of Korea (No. 20163010092290 ). This work was supported by the New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20163010092290).