期刊
ENERGY CONVERSION AND MANAGEMENT
卷 212, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2020.112799
关键词
Modified HZSM-5; Catalytic steam reforming; Activation energy; Regeneration; Biomass tar cracking
资金
- National Key R&D Program of China [2017YFE0124200]
- National Natural Science Foundation of China [U1710103, 21676292, 21978317]
- Key Research and Development Program of Xuzhou [KC18222]
- Qing Lan Project
- Priority Academic Program Development of Jiangsu Higher Education Institutions
This paper investigated the performance of HF modified HZSM-5 supported nickel catalysts (Ni/FZ5) in steam reforming of toluene (TSR) and biomass pyrolysis tar (BSR). The mesopores volume of support increased from 0.021 to 0.061 cm(3)/g with decreasing acid amount from 2.27 to 0.41 mmol/g after HF treatment. Catalysts with different Ni loadings were prepared and characterized. The Ni/FZ5 with Ni loading of 9 wt% possesses relatively large specific surface area (337 m(2)/g) and average pore size (2.91 nm), as well as small Ni particle size (23 nm) and high dispersion. In the process of TSR, 9Ni/FZ5 was kept above 70% for 7 h. Owing to the calculated lower apparent activation energy (30.76 KJ/mol), 9Ni/FZ5 exhibited the best performance in BSR at 650 degrees C, achieving the largest H-2 yield of 52.8 mmol/g and the highest selectivity of H-2 at 72.8%. Additionally, only 1.6 mg/g eetelyst of coke deposition was detected. Moreover, its high activity was still identified with excellent hydrothermal stability even after 7 times of regeneration. All findings suggest that 9Ni/FZ5 is a promising catalyst for biomass tar cracking.
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