首页|Enhanced catalytic performance of H3PO4/SiO2 by doping WO3 and Ag for the vapor-phase dehydration of 1,2-propanediol to form propanal
Enhanced catalytic performance of H3PO4/SiO2 by doping WO3 and Ag for the vapor-phase dehydration of 1,2-propanediol to form propanal
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NSTL
Elsevier
Vapor-phase dehydration of 1,2-propanediol to form propanal was performed over H3PO4/SiO2 catalyst with Bronsted acid sites, which exhibited a high activity for the formation of propanal, and the successive modification of H3PO4/SiO2 by WO3 and Ag could further improve both the activity and the stability of catalysts. The H3PO4/SiO2 catalyst modified by both Ag and WO3 could provide a propanal selectivity of 94.6% with a complete conversion of 1,2-propanediol in an H-2 flow at 250 ? and a weight hourly space velocity of 2.70 h(-1). Bronsted acid sites were effective for the formation of propanal, and the doping of WO3 could significantly increase the amount of Bronsted acid sites, resulting in the improvement of catalytic activity. On the other hand, the doping of Ag could protect the Bronsted acid sites and inhibit coke deposition on the catalyst surface in an H2 atmosphere, leading to the improvement of catalyst stability.
NSTL
Elsevier
