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This study aims to investigate the catalytic behaviors on W/TiO 2 catalysts having different phases of TiO 2 towards catalytic dehydration of ethanol to higher value products including ethylene, diethyl ether, and acetaldehyde. In fact, TiO 2 support with different crystalline phases can result in differences of physico-chemical properties of the catalyst. Therefore, the present work reports on the catalytic behaviors that were altered with different phases of TiO 2 in catalytic ethanol dehydration to diethyl ether or ethylene as a major product. To prepare the catalysts, three different phases [anatase (A), rutile (R), and mixed phases (P25)] of TiO 2 supports were impregnated with 10 wt% of tungsten (W). It was found that the W/TiO 2 -P25 catalyst revealed higher activity among other catalysts. At 300 °C, all catalysts can produce the diethyl ether yield of 24.1%, 22.8%, and 10.6% for W/TiO 2 -P25, W/TiO 2 -A, and W/TiO 2 -R catalysts, respectively. However, when the reaction temperature was increased to 400°C, ethylene is the major product. The W/TiO 2 -P25 and W/TiO 2 -A catalysts render the ethylene yield of 60.3% and 46.2%, respectively, whereas only 15.9% is obtained from W/TiO 2 -R catalyst. The most important parameter influencing their catalytic properties appears to be the proper pore structure, acidity, and distribution of W species. Copyright © 2019 BCREC Group. All rights reserved

Catalytic Dehydration of Ethanol over W/TiO2 Catalysts Having Different Phases of Titania Support