Abstract
The catalytic conversion of bio-platform molecules into desired products can be an important unit for the future biorefinery. The present contribution consists of synthesis of solid acid catalyst comprising 20 % 12-tungstophosphoric acid (TPA) and MCM-41 and its characterization by various physico-chemical techniques such as fourier transform infrared, X-ray diffraction surface area measurement (BET method), transmission electron microscopy and total acidity. The use of synthesized catalyst was explored for esterification of bio-platform molecules such as succinic acid and malonic acid with different alcohols. The catalyst shows high activity in terms of higher yields towards all diesters. The product selectivity towards the mono and diester was found to be the same for TPA alone and supported system, TPA2/MCM-41, that also confirms the uniform distribution of the TPA on MCM-41. The excellent catalytic performance is attributed to the large surface area and pore diameter of the mesoporous support, MCM-41 as well as the Bronsted acid strength of TPA, as active sites. The catalyst shows the potential of being used as a recyclable catalytic material after simple regeneration without significant loss in activity.
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One of the authors, Ms. Varsha Brahmkhatri, is thankful to BRNS, Project. No. 2007/37/20/BRNS/917, BARC, Mumbai, for the financial assistance.
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Brahmkhatri, V., Patel, A. Esterification of bioplatform molecules over 12-tungstophosphoric acid anchored to MCM-41. J Porous Mater 20, 209–217 (2013). https://doi.org/10.1007/s10934-012-9590-1
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DOI: https://doi.org/10.1007/s10934-012-9590-1