Journal
CATALYSIS COMMUNICATIONS
Volume 11, Issue 15, Pages 1176-1180Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2010.06.013
Keywords
Methyl lactate; Acrylic acid; Methyl acrylate; Basicity; Ca-3(PO4)(2); SiO2
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Funding
- Ministry of Knowledge Economy (MKE) [TS-091-49]
- KRICT [KK-1001-B0]
- KOFST
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A series of catalysts consisting of Ca-3(PO4)(2) supported on SiO2 (silicate, colloidal silica and fumed silica) and Ca-3(PO4)(2)-SiO2 (silicate) with different loadings of Ca-3(PO4)(2) (70 to 95 wt.%) was prepared by sol-gel and wet-impregnation methods. These catalysts were characterized by N-2 isotherm for specific surface area. XRD for crystallinity, TPD-NH3 for total acidity and TPR-CO2 for basicity and SEM for morphological features of the active phases over the support. All the catalysts were found to be active in the vapor phase dehydration of methyl lactate (ML) to give mainly acrylic acid (AA), methyl acrylate (MA). Among the catalysts, Ca-3(PO4)(2)-SiO2(silicate) of (80:20 wt.%) was found to be an efficient catalyst in the dehydration of ML, which gave 73.6% conversion of ML with selectivity for AA and MA together (77.1%). (C) 2010 Elsevier B.V. All rights reserved.
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