Highly Selective Catalytic Propylene Glycol Synthesis from Alkyl Lactate over Copper on Silica: Performance and Mechanism Full article
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Applied Catalysis B: Environmental
ISSN: 0926-3373 , E-ISSN: 1873-3883 |
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| Output data | Year: 2012, Volume: 119-120, Pages: 340-347 Pages count : 8 DOI: 10.1016/j.apcatb.2012.03.003 | ||||
| Tags | Alkyl lactate, Copper-silica, Hydrogenolysis, Propylene glycol | ||||
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Abstract:
Catalytic alkyl lactate hydrogenolysis over silica-supported copper at atmospheric hydrogen pressure and temperature range 433-493 K provides an eco-friendly green alternative to the petroleum-based process for propylene glycol synthesis. It was shown that catalytic activity strongly depends on copper loading and the most active catalyst contains ca. 45 wt.% Cu. General peculiarities of methyl and butyl lactate hydrogenolysis were studied demonstrating that an overall reaction rate increases with reaction temperature increase but a selectivity to propylene glycol decreases due to enhanced concurrent dehydrogenation of propylene glycol to a by-product hydroxyacetone. It was found that the amount of propylene glycol formed during the reaction is determined by thermodynamic equilibrium between propylene glycol and hydroxyacetone that results in propylene glycol selectivity of 96% at full butyl lactate conversion at 453 K. Overall mechanism of alkyl lactate transformation involving formation of intermediate hemiacetal over bifunctional Cu/SiO2 catalyst was proposed
Cite:
Simonov M.N.
, Zaikin P.A.
, Simakova I.L.
Highly Selective Catalytic Propylene Glycol Synthesis from Alkyl Lactate over Copper on Silica: Performance and Mechanism
Applied Catalysis B: Environmental. 2012. V.119-120. P.340-347. DOI: 10.1016/j.apcatb.2012.03.003 WOS Scopus РИНЦ OpenAlex ANCAN
Highly Selective Catalytic Propylene Glycol Synthesis from Alkyl Lactate over Copper on Silica: Performance and Mechanism
Applied Catalysis B: Environmental. 2012. V.119-120. P.340-347. DOI: 10.1016/j.apcatb.2012.03.003 WOS Scopus РИНЦ OpenAlex ANCAN
Dates:
| Submitted: | Nov 13, 2011 |
| Accepted: | Mar 6, 2012 |
| Published online: | Mar 6, 2012 |
| Published print: | May 1, 2012 |
Identifiers:
| ≡ Web of science: | WOS:000304691700040 |
| ≡ Scopus: | 2-s2.0-84859485580 |
| ≡ Elibrary: | 17982098 |
| ≡ OpenAlex: | W2038698974 |
| ≡ Chemical Abstracts: | 2012:659414 |
| ≡ Chemical Abstracts (print): | 156:666823 |