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

Zhang, Shihong, Yang, Mingfa, Shao, Jingai, Yang, Haiping, Zeng, Kuo, Chen, Yingquan, Luo, Jun, Agblevor, Foster A., Chen, Hanping
The Science of the total environment 2018 v.628-629 pp. 350-357
biomass, carbon, catalysts, cellulose, corn stover, ethylene, feedstocks, hemicellulose, iron, lignin, oil and gas industry, pyrolysis, temperature
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.