| Title: | Characterization of Different Si- and Al-based Catalysts with Pd Modification and Their Use for Catalytic Dehydration of Ethanol |
| Author(s): | Kamsuwan T; Jongsomjit B; |
| Address: | "Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University" |
| ISSN/ISBN: | 1347-3352 (Electronic) 1345-8957 (Linking) |
| Abstract: | "This study aims to investigate the production of ethylene and diethyl ether from ethanol via catalytic dehydration using Si- and Al-based catalysts with Pd modification. First, six catalysts including H-beta zeolite (HBZ), mixed phases of gamma-chi-Al(2)O(3) (M-Al) and gamma-Al(2)O(3) (G-Al) with and without Pd modification (0.5 wt%) were prepared. The catalytic dehydration of vaporized ethanol at temperature ranging from 200 to 400 degrees C was performed over the catalysts. For ethylene production, the most promising catalyst is HBZ (giving ethylene yield of ca. 99% at 400 degrees C), whereas Pd modification has no significant effect on ethylene production. Considering the production of diethyl ether, it is produced at lower temperature (ca. 250 degrees C) than that of ethylene. The most active catalyst to produce diethyl ether is HBZ with Pd modification (giving diethyl ether yield of ca. 48% at 250 degrees C). Thus, increased diethyl ether yield can be achieved with Pd modification at low temperature for the HBZ catalyst. Other catalysts such as M-Al and G-Al can also produce significant amounts of ethylene. To elucidate the effect of Pd modification on these catalysts, different characterization techniques such as nitrogen physisorption (BET and BJH methods), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS) and ammonia temperature-programmed desorption were performed and further discussed in more detail" |
| Keywords: | "Aluminum Compounds/*chemistry Catalysis Chemistry, Organic/methods Desiccation Ethanol/*chemistry Ether/*chemical synthesis Ethylenes/*chemical synthesis Palladium/*chemistry Silicon Compounds/*chemistry Temperature Volatilization Pd modification Si-Al ba;" |
| Notes: | "MedlineKamsuwan, Tanutporn Jongsomjit, Bunjerd eng Japan 2018/08/03 J Oleo Sci. 2018; 67(8):1005-1014. doi: 10.5650/jos.ess18001" |
