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Comparision of catalytic fast pyrolysis of biomass to aromatic hydrocarbons over ZSM-5 and Fe/ZSM-5 catalysts

Sun, Laizhi, Zhang, Xiaodong, Chen, Lei, Zhao, Baofeng, Yang, Shuangxia, Xie, Xinping
Journal of analytical and applied pyrolysis 2016 v.121 pp. 342-346
aromatic hydrocarbons, biomass, catalysts, chromatography, iron, mass spectrometry, polymerization, pyrolysis, temperature, zeolites
The Fe/ZSM-5 catalyst was prepared and used for fast pyrolysis of biomass to aromatic hydrocarbons by pyrolysis-gas chromatography/mass spectrometry experiments (Py-GC/MS). It was found that the Fe/ZSM-5 catalyst demonstrated better activity in the conversion of oxygenates and formation of monocyclic aromatic hydrocarbons (MAHs) than the ZSM-5 catalyst. Furthermore, for catalytic fast pyrolysis of biomass with Fe/ZSM-5 catalyst, the yields of aromatic hydrocarbons were significantly increased with the rise of temperature from 500°C to 600°C, and then decreased with the increase of temperature from 600°C to 800°C. Based on the results of catalyst characterization and activity experiments, it seems that the Fe/ZSM-5 catalyst maintained the structure of ZSM-5, and the incorporation of Fe into ZSM-5 zeolites contributed to the formation of MAHs and simultaneously hindered the further polymerization reaction of MAHs and other oxygenates.