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用Lewis酸或Brnsted酸催化剂和N_2汽提法使木糖脱水为糠醛(英文) 被引量:2
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作者 Iker AGIRREZABAL-TELLERIA Cristina GARCíA-SANCHO +1 位作者 pedro maireles-torres pedro Luis ARIAS 《催化学报》 SCIE CAS CSCD 北大核心 2013年第7期1402-1406,共5页
The activity of Lewis (Nb2O5) and Br nsted (Amberlyst 70) acid catalysts for the cyclodehydration of xylose to furfural was studied. The nature of the acidity resulted in significant changes in the reaction mechanism.... The activity of Lewis (Nb2O5) and Br nsted (Amberlyst 70) acid catalysts for the cyclodehydration of xylose to furfural was studied. The nature of the acidity resulted in significant changes in the reaction mechanism. Lewis acid sites promote the formation of xylulose, while Br nsted acid sites are required to further dehydrate the sugar to furfural. Amberlyst 70 in water/toluene at 175 ℃ showed lower activity but gave a higher furfural yield. Using N2 as the stripping agent considerably improved the furfural yield and product purity in the stripped stream. Catalyst stability was also studied. 展开更多
关键词 环化脱水 酸催化剂 刘易斯 糠醛 木糖 Br 氮气 大孔树脂
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Vapor Phase Decarbonylation of Furfural to Furan over Nickel Supported on SBA-15 Silica Catalysts
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作者 Diana Vargas-Hernández Juan Miguel Rubio-Caballero +6 位作者 Ramon Moreno-Tost Josefa María Mérida-Robles José Santamaría-González Antonio Jiménez-López María Ana Pérez-Cruz Rosario Hernández-Huesca pedro maireles-torres 《Modern Research in Catalysis》 CAS 2016年第3期85-94,共10页
Vapor-phase transformations of furfural over SBA-15 silica supported Ni catalysts under H<sub>2</sub> in a continuous-flow reactor at atmospheric pressure and 170&deg;C and 230&deg;C were investiga... Vapor-phase transformations of furfural over SBA-15 silica supported Ni catalysts under H<sub>2</sub> in a continuous-flow reactor at atmospheric pressure and 170&deg;C and 230&deg;C were investigated. Two different samples having Ni loadings of 5 and 20 wt% (denoted here by SBA-5Ni and SBA-20Ni, respectively) were prepared by impregnation and characterized by atomic absorption spectroscopy, N<sub>2</sub> sorption analysis, X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy. Furan and furfuryl alcohol were two primary products resulting, respectively, from decarbonylation and hydrogenation of furfural. Under the conditions of the study, both reactions exhibited structure sensitivity evidenced by changes in product selectivities with variable Ni loadings. Compared with SBA-20Ni, the 5 wt% Ni catalyst showed better catalytic activity, reaching a furfural conversion of 100 mol% and a selectivity to furan of 98 mol%, after 5 h of time-on-stream at 230&deg;C. 展开更多
关键词 Ni-SBA-15 FURFURAL HYDROGENATION FURAN Furfuryl Alcohol
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