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The conversion of biomass to light olefins on Fe-modified ZSM-5 catalyst: Effect of pyrolysis parameters

Author:
Zhang, Shihong, Yang, Mingfa, Shao, Jingai, Yang, Haiping, Zeng, Kuo, Chen, Yingquan, Luo, Jun, Agblevor, Foster A., Chen, Hanping
Source:
The Science of the total environment 2018 v.628-629 pp. 350-357
ISSN:
0048-9697
Subject:
biomass, carbon, catalysts, cellulose, corn stover, ethylene, feedstocks, hemicellulose, iron, lignin, oil and gas industry, pyrolysis, temperature
Abstract:
Light olefins are the key building blocks for the petrochemical industry. In this study, the effects of in-situ and ex-situ process, temperature, Fe loading, catalyst to feed ratio and gas flow rate on the olefins carbon yield and selectivity were explored. The results showed that Fe-modified ZSM-5 catalyst increased the olefins yield significantly, and the ex-situ process was much better than in-situ. With the increasing of temperature, Fe-loading amount, catalyst to feed ratio, and gas flow rate, the carbon yields of light olefins were firstly increased and further decreased. The maximum carbon yield of light olefins (6.98% C-mol) was obtained at the pyrolysis temperature of 600°C, catalyst to feed ratio of 2, gas flow rate of 100ml/min, and 3wt% Fe/ZSM-5 for cellulose. The selectivity of C2H4 was more than 60% for all feedstock, and the total light olefins followed the decreasing order of cellulose, corn stalk, hemicelluloses and lignin.
Agid:
5926291