title: Degradation of glycerol using hydrothermal process.
abstract: Sub-critical or supercritical water was utilized for the degradation of glycerol in an environmentally benign reaction. The reaction was carried out in a batch reactor in the temperature range of 473-673 K, pressure of 30 MPa, and reaction time of 20-60 min. The effects of temperature and reaction time were observed. The degradation of glycerol produced acetaldehyde, acrolein, allyl alcohol and un-identified products. The highest yield of acrolein, acetaldehyde and allyl alcohol were 0.20, 7.17, 96.69 mol%, respectively. Glycerol conversion was 99.92 mol%. While acetaldehyde was formed only in sub-critical water and allyl alcohol only in supercritical water, acrolein was formed in both. The kinetics of the global reaction displayed a pseudo-first-order. The activation energy at subcritical water was 39.6 kJ/mol. Based on the results, this method could be an efficient method for glycerol degradation because the high conversion of glycerol was obtained.
authors.affiliation: Chemical Engineering Department, Faculty of Industrial Technology, Sepuluh Nopember Institute of Technology, Indonesia.
authors.forename: Lailatul
authors.initials: L
authors.lastname: Qadariyah
authors.lastname: Mahfud
authors.lastname: Sumarno
authors.forename: Siti
authors.initials: S
authors.lastname: Machmudah
authors.lastname: Wahyudiono
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Sasaki
authors.forename: Motonobu
authors.initials: M
authors.lastname: Goto
mesh_terms: D000079:Acetaldehyde / Q000737:chemistry; D000171:Acrolein / Q000737:chemistry; D056804:Biofuels; D005990:Glycerol / Q000737:chemistry*; D006358:Hot Temperature; D007700:Kinetics; D011312:Pressure; D020005:Propanols / Q000737:chemistry; D013997:Time Factors
chemical_list: D056804:Biofuels; D020005:Propanols; C006463:allyl alcohol; D000171:Acrolein; D000079:Acetaldehyde; D005990:Glycerol