Fe-modified HZSM-5 catalysts for ethanol conversion into light olefins

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• 作者：Jiangyin Lu  ; ;   ; ^{yinglu@xju.edu.cn} ; Yancong Liu ; Na Li
• 关键词：bio-ethanol ; light olefins ; HZSM-5 ; Fe modification
• 刊名：Journal of Natural Gas Chemistry
• 出版年：2011
• 出版时间：July 2011
• 年：2011
• 卷：20
• 期：4
• 页码：423-427
• 全文大小：226 K

文摘

A series of Fe/HZSM-5 catalysts with different iron loadings were prepared by impregnation method. Characterization was performed by N₂ adsorption-desorption, X-ray diffraction (XRD), NH₃ temperature-programmed desorption (NH₃-TPD), temperature-programmed reduction (TPR), temperature-programmed oxidation (TPO) and thermogravimetry (TG) analysis. Iron content in the synthesized samples varied from 1.1 wt % to 20 wt % . The obtained samples have been used for ethanol conversion into light olefins. It was found that the amount of strong acidity at 300-550 ¡ãC on Fe-modified samples was decreased, going with another new acid site appearance at 550-600 ¡ãC and that Fe/HZSM-5 catalysts were highly selective towards light olefins, especially the 9FZ sample. In addition, Fe-modified catalysts suppressed the conversion of ethanol to aromatics and paraffins and enhanced their anti-carbon deposit ability.