title: Acrolein synthesis from glycerol in hot-compressed water.
abstract: Glycerol conversion was conducted in hot-compressed water (HCW: 573-673 K, 25-34.5 MPa) using a batch and a flow apparatus and the influences of temperature, H(2)SO(4), glycerol concentration, and pressure, were examined. The yield of acrolein was enhanced by higher glycerol and H(2)SO(4) concentration, and higher pressure. Approximately 80% selectivity of acrolein was obtained at 90% of glycerol conversion with an acid catalyst in supercritical condition (673 K and 34.5 MPa). The rate constant of acrolein decomposition was always higher than that of acrolein formation in the absence of acid catalyst but the rate constant of acrolein formation could be overcome that of acrolein decomposition by addition acid in supercritical condition.
authors.affiliation: Research Center of Supercritical Fluid Technology, Tohoku University, 6-6-11-403 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.
authors.forename: Masaru
authors.initials: M
authors.lastname: Watanabe
authors.forename: Toru
authors.initials: T
authors.lastname: Iida
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Aizawa
authors.forename: Taku M
authors.initials: TM
authors.lastname: Aida
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Inomata
mesh_terms: D000171:Acrolein / Q000138:chemical synthesis*; D005990:Glycerol / Q000737:chemistry*; D006358:Hot Temperature; D007700:Kinetics; D012680:Sensitivity and Specificity; D013464:Sulfuric Acids / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D013464:Sulfuric Acids; D014867:Water; D000171:Acrolein; C033158:sulfuric acid; D005990:Glycerol