AUTHOR=Xia Meiling , Wang Yunpu , Wu Qiuhao , Zeng Yuan , Zhang Shumei , Dai Leilei , Zou Rongge , Liu Yuhuan , Ruan Roger 

TITLE=Microwave-Assisted Camellia oleifera Abel Shell Biochar Catalyzed Fast Pyrolysis of Waste Vegetable Oil to Produce Aromatic-Rich Bio-Oil

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 10 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2022.837875

DOI=10.3389/fenrg.2022.837875

ISSN=2296-598X

ABSTRACT=In this work, Camellia oleifera Abel shell was used as feedstock to prepare biochar by HNO3 impregnation and pyrolysis. The biochar was used for the catalytic pyrolysis of waste vegetable oil to prepare bio-oil. Experimental results showed that HNO3 solution treatment had an important effect on the groups and structure of biochar catalyst. When the solid/liquid ratio of pretreatment was 1:3, the Brunauer-Emmett-Teller specific surface area of the 1:3-600 °C biochar is 392.65 m²/g, which is approximately 677 times higher than that of untreated biochar. Moreover, the biochar catalyst had a remarkable catalytic performance. The selectivity of monocyclic aromatic hydrocarbon in the bio-oil was up to 78.82%, and the oxy-compound could be completely removed at the catalytic temperature of 600 °C. However, the increase of catalyst-to-waste vegetable oil ratio and catalytic temperature decreased bio-oil yield.