Abstract
Effects of water on various acid-catalyzed reactions have been studied mainly using MoO3/ZrO2. While the reaction rate of gas-phase esterification of acetic acid with ethanol and the dehydration of 2-butanol over SiO2-Al2O3 decreased significantly by the addition of water vapor in the feed gas, these reactions over MoO3/ZrO2 were found to be greatly enhanced by the presence of water. The enhancement by water was reversible and was remarkable when MoO3/ZrO2 was calcined at a temperature range of 773-1073 K. IR spectroscopy of H2O adsorbed on MoO3/ZrO2 suggests that the acceleration effect of water would be due to the generation of acidic sites from water coordinated to Mo species on the surface of MoO3/ZrO2.
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Li, L., Yoshinaga, Y. & Okuhara, T. Unprecedented Acceleration Effects of Water on Acid-Catalyzed Reactions Over Molybdena-Zirconia Catalysts. Catalysis Letters 83, 231–234 (2002). https://doi.org/10.1023/A:1021090115340
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DOI: https://doi.org/10.1023/A:1021090115340