Kim, Yong Tae You, Su Jin Jung, Kwang-Deog Park, Eun Duck 2024-01-20T14:31:21Z 2024-01-20T14:31:21Z 2022-01-25 2012-07 0253-2964 https://pubs.kist.re.kr/handle/201004/129080 The gas-phase dehydration of glycerol to acrolein was carried out over silicotungstic acid (H4SiW12O40 center dot xH(2)O, HSiW) catalysts supported on SiO2, eta-Al2O3, and silica-aluminas with different Al contents. The HSiW catalysts supported on silica-aluminas showed higher glycerol conversions and acrolein yields during the initial 2 h at 315 degrees C than did SiO2- and eta-Al2O3-supported HSiW catalysts. Among the tested catalysts, HSiW/Si0.9Al0.1Ox exhibited the highest space-time yield during the initial 2 h. The loaded HSiW species can change the acid types and suppress the formation of carbonaceous species on Al-rich silica-aluminas. The deactivated HSiW supported on silica-aluminas can be fully regenerated after calcination in air at 500 degrees C. As long as the molar ratio between water and glycerol was in the range of 2-11, the acrolein selectivity increased significantly with increasing water content in the feed, while the surface carbon content decreased owing to the suppression of heavy compounds. English KOREAN CHEMICAL SOC Effect of Al Content on the Gas-Phase Dehydration of Glycerol over Silica-Alumina-Supported Silicotungstic Acid Catalysts Article 10.5012/bkcs.2012.33.7.2369 1 BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.33, no.7, pp.2369 - 2377 BULLETIN OF THE KOREAN CHEMICAL SOCIETY 33 7 2369 2377 N scie scopus kci ART001681709 000306818100045 2-s2.0-84864235693 Chemistry, Multidisciplinary Chemistry Article LONG-LIFE CATALYST SOLID ACID SUSTAINABLE PRODUCTION METAL OXIDE ACROLEIN SPECTROSCOPY CONVERSION CHEMICALS H3PW12O40 Dehydration Glycerol Acrolein Silica-alumina Silicotungstic acid