Vapor-Phase Cracking of 4-Vinylguaiacol in a Laminar-Flow Reactor: Kinetics and Effect of Temperature on Product Composition

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• 作者：Elmer B. Ledesma ; Jennifer N. Hoang ; Adam J. Solon ; Marianne M. H. Tran ; Mitchell P. Nguyen ; Hien D. Nguyen ; Tammy Hendrix-Doucette ; Jacqueline V. Vu ; Carla K. Fortune ; Shuhsien Batamo
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：August 6, 2014
• 年：2014
• 卷：53
• 期：31
• 页码：12527-12536
• 全文大小：480K
• ISSN：1520-5045

文摘

The vapor-phase cracking of 4-vinylguaiacol has been investigated in a nonisothermal, laminar-flow reactor at temperatures between 300 and 900 掳C and a residence time of one second. Products identified by gas chromatography were oxygenated compounds such as phenols, cresols, furans, ketones, and aldehydes, single-ring and polycyclic aromatic hydrocarbons, C₁鈥揅₆ hydrocarbon gases, and carbon monoxide. Temperature had a marked effect in governing the overall product composition. Conversion of 4-vinylguaiacol to products increased above 400 掳C and was completed at 550 掳C. Reaction rate parameters derived from the conversion data were A = 10¹³ s^鈥? and E_a = 45.3 kcal mol^鈥?. The oxygenated compounds were observed as products in the range 450鈥?00 掳C, peaking in yields below 700 掳C. The aromatic hydrocarbons and light gases dominated the product composition above 600 掳C, especially at 900 掳C, the highest temperature investigated. On the basis of the experimental data showing the effect of temperature on product composition, reaction pathways leading to products formation are proposed.