Kinetic Model for the Transformation of 1-Butene on a K-Modified HZSM-5 Catalyst

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• 作者：Eva Epelde ; Andr茅s T. Aguayo ; Martin Olazar ; Javier Bilbao ; Ana G. Gayubo
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：July 2, 2014
• 年：2014
• 卷：53
• 期：26
• 页码：10599-10607
• 全文大小：437K
• ISSN：1520-5045

文摘

A kinetic model of eight lumps (methane, ethylene, propylene, C_2鈥? paraffins, butanes, C₅₊ hydrocarbons (aliphatic hydrocarbons of five or more carbon atoms), and aromatics (benzene, toluene, and xylenes, BTX)) has been established for the transformation of 1-butene over a 1 wt % K modified HZSM-5 zeolite (SiO₂/Al₂O₃ = 280) catalyst (of moderate acidity). The kinetic model allows quantifying product distribution at zero time on stream, and particularly propylene production, which has an increasing demand in petrochemical industry. The experimental data have been obtained in an isothermal fixed-bed reactor in the 400鈥?00 掳C range and under a wide range of experimental conditions: space time up to 1.6 (g_catalyst h) (mol_CH2)^鈭? and 1-butene partial pressure between 0.375 and 1.35 bar. It has been proven that a simplified kinetic model of five lumps (ethylene, propylene, butenes, C_1鈥? paraffins and C₅₊ hydrocarbons (aliphatics and aromatics)) is also suitable. Both models predict a product distribution that fits the experimental results in the range of operating conditions studied.