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Waste Tire Pyrolysis for the Production of Light Hydrocarbons over Layered Catalysts
Author(s) -
Leng Shuai,
Wang Xinde,
Wang Jianguo,
Liu Yue'e,
Ma Fengyun,
Zhong Xing
Publication year - 2015
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201500031
Subject(s) - pyrolysis , catalysis , ethylbenzene , toluene , xylene , selectivity , benzene , chemical engineering , zeolite , materials science , cracking , waste management , organic chemistry , chemistry , composite material , engineering
The pyrolysis of tire waste has attracted widespread attention because valued chemicals (for example aromatic, benzene‐based compounds) can be produced during this process. In this work, a layered catalyst was applied to waste tire pyrolysis to obtain high selectivity for light hydrocarbons (benzene, toluene, xylene, and ethylbenzene). The process was performed in fixed‐bed reactor. The layered catalyst was composed of separate layers of HZSM‐5 (a zeolite‐based catalyst) in the bottom layer and ZnO in the top layer mixed with the tire waste. The layered catalysts showed better performance in the selective production of light hydrocarbons (30.23 %), compared to mixed catalysts and ZnO alone. HZSM‐5 played an important part in secondary cracking of pyrolysis vapors to produce light hydrocarbons. HZMS‐5 could be reused several times and achieve high selectivity of light hydrocarbons over mixture catalysts of regenerated and fresh HZSM‐5 (1:1), and this is proposed a feasible way to achieve successive production.