C–O Hydrogenolysis of C3–C4 Polyols Selectively to Terminal Diols over Pt/W/SBA-15 Catalysts

Abstract

Pt/W/SBA-15 catalysts (with Pt-loading = 0.5–4 wt% and W-loading = 1 wt%) prepared by the sequential impregnation method were evaluated for selective C–O cleavage of erythritol and glycerol in an aqueous medium. The Pt and W particles dispersed on SBA-15 approached close proximity at higher Pt loadings and afforded synergistic enhancement in C–O hydrogenolysis activity/selectivity. 1,4-Butanediol yields of 30.9% (at 190 °C, 50 bar H2 and 24 h) and 1,3-propanediol yields of 34.4% (at 190 °C, 50 bar H2 and 12 h of reaction) were obtained over these catalysts. Pt nanoparticles (facilitating dissociative H2 adsorption and spillover) and W (present as acidic oligomeric WOx species; activating and coordinating the polyol via 1°-OH group) worked in tandem for the selective hydrogenolysis of polyols yielding terminal diols of industrial demand.

Kinetic Modeling of Erythritol Deoxydehydration and Consecutive Hydrogenation over the ReOx-Pd/CeO2 Catalyst

“…Erythritol, a C4 sugar alcohol, is another important building block because of its relatively easy production by fermentation of glycerol as well as glucose . Target value-added products from erythritol or its dehydration product 1,4-anhydroerythritol include butanetriols, butanediols, tetrahydrofuran, dihydrofurans, 2-butanol, and 1,3-butadiene …”

Thioresistant PdPt/Al/SBA-15 for Naphthalene Hydrogenation

“…have been applied in those schemes. , It has been determined that the saturating characteristics of NM catalysts strongly depended on their interaction with the used carrier . SBA-15 mesoporous silica matrices constitute very attractive materials for numerous applications , due to their very good textural properties and hydrothermal stability . These characteristics are crucial considering that NM phases could be deposited through impregnation of salts in aqueous solutions followed by drying (thus, steam being formed).…”