关键词: 乙醇；杂醇；脱水；乙烯；FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体" lang=EN-US>HZSM-5

Abstract:

The effects of isopropanol, isobutyl alcohol and isoamyl alcohol on the ethanol dehydration to ethylene catalyzed by 2.0% La/HZSM-5 were investigated.With the characterization of NH₃-TPD, BET and TG, the reaction mechanism was analyzed.The three fusel alcohols can result in dehydration, and produce olefin products that are easily polymerized.These products have significant effects on the performance of the catalyst.The coke on the catalyst is aggravated as the number of carbon atoms in the fusel increases, so that the catalytic performance is worse.Compared with HZSM-5, 2.0%La/HZSM-5 has larger surface area and pore volume, more surface acid, stronger weak acid centers, and weaker strong acid centers, presenting better catalytic performance.

Key words: 乙醇；杂醇；脱水；乙烯；FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体" lang=EN-US>HZSM-5