Catalytic conversion of lactic acid into propylene glycol over various metals supported on silica

Catalytic hydrogenation of lactic acid to propylene glycol was performed over various metals (Ag, Co, Cu, Ni, Pt, and Ru) supported on silica prepared by an incipient wetness impregnation method. The loading amount of each metal was 5 wt%. Crystallinity of the synthesized catalysts was investigated...

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Bibliographic Details
Published inResearch on chemical intermediates Vol. 37; no. 9; pp. 1275 - 1282
Main Authors Jang, Tae Young, Chung, Ku Bong, Eom, Hye Ri, Noh, Dong Kyun, Song, In Kyu, Yi, Jongheop, Baeck, Sung-Hyeon
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Netherlands 01.11.2011
Subjects
Catalysis
Chemistry
Chemistry and Materials Science
Inorganic Chemistry
Physical Chemistry
Propylene glycol
Ruthenium
Lactic acid
Hydrogenation
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Summary:Catalytic hydrogenation of lactic acid to propylene glycol was performed over various metals (Ag, Co, Cu, Ni, Pt, and Ru) supported on silica prepared by an incipient wetness impregnation method. The loading amount of each metal was 5 wt%. Crystallinity of the synthesized catalysts was investigated by X-ray diffraction (XRD), and the BET method was utilized to examine the surface area. Pore volume and pore size of catalysts were determined using BJH analysis of the N 2 adsorption isotherm. Particle sizes of various metals were determined from transmission electron microscopy (TEM) images. The catalytic activity was found to be strongly dependent on the supported metal. Among catalysts tested, Ru/SiO 2 showed the highest propylene glycol yield. The yield of propylene glycol increased with pressure, and the highest yield was achieved at 130 °C.
ISSN:0922-6168
1568-5675
DOI:10.1007/s11164-011-0392-x