Different solid acid catalysts, sulfonic acid functionalized amorphous and mesoporous silicas, titaniadoped silica HMS, sulfated zirconia and niobic acid, were synthesized, characterized and tested in theesterification reaction of glycerol. Their catalytic performance was compared with that of commercialAmberlyst-15. Fresh and spent materials were analyzed by means of X-ray photoelectron spectroscopy,N2 adsorption isotherms and acid capacity measurements. Among all the catalysts the mesoporous sulfonicsilica presented the best performance in term of reactivity, with the total conversion of glycerol in30 min of reaction, and in term of stability, with no leaching of sulfonic groups of catalyst. The catalyticactivity of the materials was related to their acid capacities as well as to the strength and surface densityof acidic sites.
Screening of different solid acid catalysts for glycerol acetylation
ML Testa
;V La Parola;LF Liotta;
2013
Abstract
Different solid acid catalysts, sulfonic acid functionalized amorphous and mesoporous silicas, titaniadoped silica HMS, sulfated zirconia and niobic acid, were synthesized, characterized and tested in theesterification reaction of glycerol. Their catalytic performance was compared with that of commercialAmberlyst-15. Fresh and spent materials were analyzed by means of X-ray photoelectron spectroscopy,N2 adsorption isotherms and acid capacity measurements. Among all the catalysts the mesoporous sulfonicsilica presented the best performance in term of reactivity, with the total conversion of glycerol in30 min of reaction, and in term of stability, with no leaching of sulfonic groups of catalyst. The catalyticactivity of the materials was related to their acid capacities as well as to the strength and surface densityof acidic sites.| File | Dimensione | Formato | |
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