A green process for glycerol valorization to glycerol carbonate over heterogeneous hydrotalcite catalyst

Yadav, Ganapati D. ; Chandan, Payal A. (2014) A green process for glycerol valorization to glycerol carbonate over heterogeneous hydrotalcite catalyst Catalysis Today, 237 . pp. 47-53. ISSN 0920-5861

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.cattod.2014.01.043

Abstract

Biodiesel production is accompanied by 10% w/w glycerol which needs to be valorized to into bulk and specialty chemicals in order to make the biodiesel economics favorable. Glycerol carbonate is one such product from glycerol which has many potential applications. A green process using calcined hydrotalcite supported on hexagonal silica (CHT-HMS) catalyst was developed for the conversion of glycerol to glycerol carbonate using dimethyl carbonate. Effects of various Al:Mg composition and loading on hexagonal mesoporous silica (HMS) were studied. Al:Mg composition of 1:2 with 15% w/w loading on HMS was the best catalyst. . CHT-HMS catalyst was fully characterized by various techniques such as FT-IR, EDAX, SEM, TPD, XRD, etc. The effects of various parameters such as speed of agitation, catalyst concentration, mole ratio, and temperature were studied. The catalyst is robust and recyclable. The reaction follows Langmuir-Hinshelwood-Hougen-Watson (LHHW) mechanism with weak adsoption of all species. Thus, a second order rate equation for the reaction was developed and the activation energy estimated.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Bioglycerol; Calcined Hydrotalcite; Green Chemistry; Glycerol Carbonate; Kinetics
ID Code:111504
Deposited On:18 Sep 2017 12:07
Last Modified:18 Sep 2017 12:07

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