4.5 Article

Esterification of valeric acid over PTA supported mesoporous Al-SBA-15 as efficient solid acid catalysts

期刊

JOURNAL OF POROUS MATERIALS
卷 28, 期 6, 页码 1907-1917

出版社

SPRINGER
DOI: 10.1007/s10934-021-01131-y

关键词

Esterification; Valeric acid; Mesoporous catalyst; Solid acid catalyst

资金

  1. CSIR through SRF [09/468/0516/2018 EMR-I]
  2. Ministry of Education, Basic Science Research Program-National Research Foundation of Korea [NRF-2020R1I1A3054816]

向作者/读者索取更多资源

The study aims to synthesize ethyl valerate (EV) as a fuel additive by esterifying valeric acid with ethanol using Al-SB and x% PTA/Al-SB catalysts. Among the catalysts, the 30% PTA/Al-SB catalyst exhibited the highest catalytic activity with 96% conversion of valeric acid and 100% selectivity towards ethyl valerate. Additionally, the recyclability of the prepared catalyst was found to be excellent.
Valeric acid can be produced by selective hydrogenation of biomass-derived levulinic acid. The present work aims to synthesize ethyl valerate (EV), a fuel, fuel additive through the esterification of valeric acid with ethanol using Al-SB and x% PTA/Al-SB (x = 20%, 30% and 40 wt.%) catalysts prepared by hydrothermal and impregnation methods. Physicochemical properties were distinguished by various analytical methods. The characterization results revealed that Al-SB conserved the mesoporous structure up to 40% loading of PTA. Transmission electron microscope images exhibited that PTA species well dispersed in the uniform pore channels of Al-SB. The catalytic performance of all the obtained catalysts towards the esterification of valeric acid with ethanol under mild reaction conditions was studied. The reaction parameters such as catalyst weight, reaction time, alcohol molar ratio and reaction temperature were optimized. Among them, 30% PTA/Al-SB catalyst exhibited the highest catalytic activity with 96% conversion of valeric acid and 100% selectivity towards ethyl valerate. The recyclability of the prepared catalyst was also studied and it was found to be excellent.

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