Journal
ENERGY CONVERSION AND MANAGEMENT
Volume 47, Issue 18-19, Pages 3344-3350Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2006.01.009
Keywords
stearic acid; decarboxylation; SCW; metal oxide catalyst; ZrO2; CeO2; Y2O3
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Stearic acid (C17H35COOH: C-17-acid) was treated using a batch reactor with supercritical water (SCW) of 673 K and 0.17 g/cm(3\) for 30 min. In SCW, C-17-acid was stable (2% conversion) and the main products were CO2 and C-16 alkene. An addition of alkali hydroxide (NaOH and KOH) in the SCW reaction enhanced the decarboxylation of C-17-acid with the main products being CO2 and C-17 alkane. Metal oxides (CeO2, Y2O3 and ZrO2) enhanced the decarboxylation of C-17-acid and the main products were C02 and C16 alkene. Based on the results, the reaction mechanism was proposed. (c) 2006 Elsevier Ltd. All rights reserved.
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