期刊
BIORESOURCE TECHNOLOGY
卷 249, 期 -, 页码 361-367出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.09.205
关键词
Sludge; Catalytic liquefaction; Ethanol-water; Biocrude
资金
- Fundamental Research Funds for the Central Universities
- Renmin University of China [14XNLQO, 15XNLD04]
- Bill & Melinda Gates Foundation
Catalytic liquefaction of (Municipal sewage sludge) MSS over transition metal catalysts in ethanol-water co-solvent (EWCS) was investigated. The effect of operating parameters like temperature, holding time, and ethanol-water ratio was discussed. CuSO4 was selected as the most efficient catalyst. The highest biocrude yield (47.45%) and liquefaction conversion (97.74%) was both obtained at the same conditions following: a reaction temperature of 270 degrees C, a holding time of 30 min, an ethanol-water ratio of 1: 1, and with CuSO4 as the catalyst. Optimized operating conditions reduced Sulfur and Nitrogen content in biocrude by 55.0% and 14.6%, respectively. The obtained biocrude samples were analyzed and characterized by thermogravimetric analysis (TGA) and gas chromatography-mass spectroscopy (GC-MS), which suggested that adding CuSO4 increased the light-oil like content in biocrude and more than 60% of compounds in biocrude were esters. This process demonstrates the effectiveness of catalytic liquefaction of MSS in EWCS over CuSO4 catalyst.
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