Journal
BIORESOURCE TECHNOLOGY
Volume 172, Issue -, Pages 162-168Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.09.006
Keywords
Microwave; Pyrolysis; Sewage sludge; Zeolite; Bio-oil
Funding
- U.S. Department of Agriculture [2013-38502-21424]
- U.S. Department of Transportation, Office of the Secretary [DTOS59-07-G-00054]
- University of Minnesota Center for Biorefining
- China Scholarship Council (CSC)
- High Technology Research and Development Program of China [2012AA021704, 2014AA022002]
- Beijing Municipal Science and Technology Commission [z141109004414002]
- International Science and Technology Cooperation Program of China [2014DFA61040]
- National High-tech R&D Program of China [2012AA021205, 2012AA101809]
- Natural Science Foundation of China [21266022]
- NSF through the MRSEC program
- NIFA [577200, 2013-38502-21424] Funding Source: Federal RePORTER
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In this study, fast microwave-assisted catalytic pyrolysis of sewage sludge was investigated for bio-oil production, with HZSM-5 as the catalyst. Pyrolysis temperature and catalyst to feed ratio were examined for their effects on bio-oil yield and composition. Experimental results showed that microwave is an effective heating method for sewage sludge pyrolysis. Temperature has great influence on the pyrolysis process. The maximum bio-oil yield and the lowest proportions of oxygen-and nitrogen-containing compounds in the bio-oil were obtained at 550 degrees C. The oil yield decreased when catalyst was used, but the proportions of oxygen-and nitrogen-containing compounds were significantly reduced when the catalyst to feed ratio increased from 1:1 to 2:1. Essential mineral elements were concentrated in the bio-char after pyrolysis, which could be used as a soil amendment in place of fertilizer. Results of XRD analyses demonstrated that HZSM-5 catalyst exhibited good stability during the microwave-assisted pyrolysis of sewage sludge. (C) 2014 Elsevier Ltd. All rights reserved.
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