Journal
BIORESOURCE TECHNOLOGY
Volume 278, Issue -, Pages 116-123Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.01.059
Keywords
Cellulose; Catalytic fast pyrolysis; Modified HZSM-5; Aromatics; Coke
Funding
- National Natural Science Foundation of China [U1710103, 21676292]
- National Key Research and Development Program [2018YFB0604600]
- Key Research and Development Program of Xuzhou [KC18222]
- Natural Science Foundation of Jiangsu Province [BK20160254]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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Pore structure and accessible active sites of HZSM-5 (Z5) are the key factors for its catalysis. The bifunctional hierarchical Z5 were prepared with leaching agent HF and loading Ni, and their performance for catalytic fast pyrolysis (CFP) of cellulose was investigated in a drop tube quartz reactor. Z5 modified with 0.5 mol/L HF (0.5F-Z5) showed excellent light aromatics (LAs) yield, which can be attributed to the enhancement in the small mesopores (2-10 nm) and the decrease of Bronsted acid sites during dealumination. Simultaneously, the loading of a 1 wt% Ni produced more LAs than 0.5F-Z5, due to the improvement in deoxidation/hydrogenation reactions. The highest LAs yield (31.3%)was obtained over 1% Ni-0.5 mol/LHF-Z5, which increased by 44.9% compared to the parent Z5. In addition, the reaction routes over different active centers and acid-catalyzed reactions were analyzed, based upon the composition of bio-oils and catalyst characterization.
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