Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 47, Issue 8, Pages 2538-2544Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ie071314z
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Tungstophosphoric acid (HPW) and MCM-48-supported HPW catalysts are potential catalysts for the esterification of long-chain fatty acids and alcohols in supercritical CO(2) medium even at low temperature (100 degrees C) and a short reaction period (6 h). The high performances of HPW in sc-CO(2) medium are due to the effective mass transfer of reactants and products for the catalysis under the conditions. The yields of esters were enhanced with the increase in the chain length of acids and alcohols in the esterification in sc-CO(2) medium. The MCM-48-supported HPW catalysts were active even after several recycle experiments.
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