Use of sewage sludge biochar as a catalyst in production of biodiesel through thermally induced transesterification  

作　　者：Sungyup Jung Minyoung Kim Yong-Hyun Kim Kun-Yi Andrew Lin Wei-Hsin Chen Yiu Fai Tsang Eilhann E.Kwon 

机构地区：[1]Department of Environmental Engineering,Kyungpook National University,Daegu 41566,Republic of Korea. [2]Department of Earth Resources and Environmental Engineering,Hanyang University,Seoul 04763,Republic of Korea [3]Department of Civil,Environmental,Resources and Energy Engineering,Jeonbuk National University,Jeollabukdo,Jeonju 54896,Republic of Korea [4]Department of Environmental Engineering and Innovation and Development Center of Sustainable Agriculture,National Chung Hsing University,250 Kuo-Kuang Road,Taichung,Taiwan,China [5]Department of Aeronautics and Astronautics,National Cheng Kung University,Tainan 701,Taiwan,China [6]Research Center for Smart Sustainable Circular Economy,Tunghai University,Taichung 407,Taiwan,China [7]Department of Mechanical Engineering,National Chin-Yi University of Technology,Taichung 411,Taiwan,China [8]Department of Scienceand Environmental Studies,The Education University of Hong Kong,Tai Po,New Territories,999077 Hong Kong,Hong Kong

出　　处：《Biochar》2022年第1期74-88,共15页生物炭（英文）

基　　金：National Research Foundation of Korea(NRF)Grant funded by the Korean government(MSIT)(NRF-2020R1A2C1010748).

摘　　要：Sewage sludge(SS)is a residual/semi-solid material produced from industrial and municipal wastewater treatment processes.SS contains a high content of lipids and earth alkaline metals that can be used as catalysts for various chemical applications;however,its valorization has rarely been the focus of research.This study demonstrates that SS could be a promising raw material for biodiesel production and a biochar catalyst to promote the reaction kinetics of alkylation.Thermally induced transesterification of the SS extract(SSE)was performed in comparison with the conventional homogeneous reaction.SS biochar was fabricated via pyrolysis.The highest yield(33.5 wt.%per SSE)of biodiesel production was achieved in 1 min of reaction at 305℃via thermally induced transesterification in the presence of SS biochar,while the yield of biodiesel from(trans)esterification with 5 wt.%H_(2)SO_(4)was less than 1%even after 24 h.The reaction kinetics(<1 min)of thermally induced transesterification was extraordinarily faster than that of conventional transesterification(3-24 h).The porous structure and high content of alkaline species in the SS biochar expedited the reaction kinetics.Consequently,the integrated/hybridized process for thermally induced transesterification and pyrolysis of the solid residue of SS was experimentally proved for the valorization of SS in this study.Considering that SS is being disposed of as a waste material and generates toxic chemicals in the environment,its valorization into value-added biodiesel and a catalyst could be an environmentally benign and sustainable technique.

关 键 词：Circular economy WASTE-TO-ENERGY Biochar catalyst BIODIESEL Wastewater treatment 

分 类 号：O64[理学—物理化学]