Catalytic Conversion of Biomass Derivates over Acid Dealuminated ZSM-5

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• 作者：Shanshan Shao ; Huiyan Zhang ; Lijun Heng ; Mengmeng Luo ; Rui Xiao ; Dekui Shen
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：October 15, 2014
• 年：2014
• 卷：53
• 期：41
• 页码：15871-15878
• 全文大小：495K
• ISSN：1520-5045

文摘

The present study describes the catalytic performance of acid treated HZSM-5 catalyst for the conversion of biomass derivates to olefins and aromatics. The ZSM-5 catalysts were prepared by changing several modifying parameters, such as the leaching agent, H⁺ concentration, processing temperature, and time. Fresh and modified catalysts were characterized by X-ray diffraction, scanning electron microscopy, surface area analysis, and NH₃ temperature programmed desorption. The results show that modified ZSM-5 (leaching agent of H₃PO₄, H⁺ concentration of 2 mol/L, temperature of 20 掳C, and time of 4 h) produced the maximum yield of chemicals (13.9% olefins and 31.8% aromatics), which are much higher than that obtained with the original ZSM-5 catalyst (9.8% olefins and 24.5% aromatics). The coke yield decreased from 44.1% with original ZSM-5 to 27.4% with modified ZSM-5. At the optimized dealumination condition, the selectivities of ethylene, propylene, and toluene increased, while those of butylene, C5, and benzene decreased compared with the original ZSM-5 catalyst.