期刊
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
卷 142, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jaap.2019.104641
关键词
Hydrogen production; Core-shell catalyst; Plastic pyrolysis; Waste to energy
资金
- Ministry of Science and Technology (MOST), Taiwan, ROC [MOST 106-2221-E-005-010-MY3]
A core-shell type catalyst was applied to convert polyethylene (PE) plastic wastes into hydrogen using a two-stage pyrolysis-catalysis reactor. The effects of catalyst: plastic ratio, reaction temperature, and the suppression of coke formation on catalytic performance were investigated. Ni-Ce bimetallic catalyst was synthesized via modified polyol method, and the silica coating with different Ni:Si molar ratio was prepared with the extension of Stober method. Different thickness of silica shell was synthesized and tested for hydrogen production from PE waste. The encapsulation of Ni-Ce core by silica shell could effectively inhibit the sintering of nanoparticles under high temperature conditions. The highest amount of hydrogen production was found when the catalyst: plastic weight ratio was 1.0, and the catalytic reaction temperature was 800 degrees C. The core-shell catalyst also exhibited great ability of coking resistance, showing great catalytic performance within 5 times of reuse.
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