A novel technology of two-step fast microwave-assisted pyrolysis (fMAP) of corn stover for bio-oil production was investigated in the presence of microwave absorbent (SiC) and HZSM-5 catalyst. Effects of fMAP temperature and catalyst-to-biomass ratio on bio-oil yield and chemical components were examined. The results showed that this technology, employing microwave, microwave absorbent and HZSM-5 catalyst, was effective and promising for biomass fast pyrolysis. The fMAP temperature of 500°C was considered the optimum condition for maximum yield and best quality of bio-oil. Besides, the bio-oil yield decreased linearly and the chemical components in bio-oil were improved sequentially with the increase of catalyst-to-biomass ratio from 1:100 to 1:20. The elemental compositions of bio-char were also determined. Additionally, compared to one-step fMAP process, two-step fMAP could promote the bio-oil quality with a smaller catalyst-to-biomass ratio.
Bibliographical noteFunding Information:
This work was supported by the National Basic Research Program (973) of China (No. 2013CB228106), the National Natural Science Fund Program of China (No. 51276040), the Scientific Research Foundation of Graduate School of Southeast University (No. YBJJ1430), the Fundamental Research Funds for the Central Universities, the Scientific Innovation Research Program of College Graduate in Jiangsu Province (No. KYLX_0183), China Scholarship Council, as well as Minnesota Environment and Natural Resources Trust Fund, North Central Regional Sun Grant Center at South Dakota State University through a grant provided by the US Department of Agriculture (No. 2013-38502-21424) and a grant provided by the US Department of Transportation, Office of the Secretary (No. DTOS59-07-G-00054).
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