High Yield of Liquid Range Olefins Obtained by Converting i-Propanol over Zeolite H-ZSM-5

详细信息    查看全文

• 作者：Uffe V. Mentzel ; Saravanamurugan Shunmugavel ; Sarah L. Hruby ; Claus H. Christensen ; Martin S. Holm
• 刊名：Journal of the American Chemical Society
• 出版年：2009
• 出版时间：November 25, 2009
• 年：2009
• 卷：131
• 期：46
• 页码：17009-17013
• 全文大小：250K
• 年卷期：v.131,no.46(November 25, 2009)
• ISSN：1520-5126

文摘

Methanol, ethanol, and i-propanol were converted under methanol-to-gasoline (MTH)-like conditions (400 °C, 1−20 bar) over zeolite H-ZSM-5. For methanol and ethanol, the catalyst lifetimes and conversion capacities are comparable, but when i-propanol is used as the reactant, the catalyst lifetime is increased dramatically. In fact, the total conversion capacity (calculated as the total amount of alcohol converted before deactivation in g_alcohol/g_zeolite) is more than 25 times higher for i-propanol compared to the lower alcohols. Furthermore, when i-propanol is used as the reactant, the selectivity toward alkanes and aromatics declines rapidly over time on stream, and at 20 bar of pressure the liquid product mixture consists almost exclusively of C₄−C₁₂ alkenes after approximately a third of the full reaction time. This discovery could open a new route to hydrocarbons via i-propanol from syn-gas or biobased feedstocks.