α–pinene Isomerization Catalyzed by a Nanometer Aolid Superacid
Nanometer composite S2O8 2-/SnO2-TiO2, a novel solid superacid, was prepared by the sol-gel method and its structure was characterized by XRD, TEM, FT-IR and nitrogen adsorption. Results indicated that the composite S2O8 2-/SnO2-TiO2 had a narrow particle size distribution with an average particle diameter about 15～20nm. S2O8 2-combined with SnO2-TiO2 resulted in formation of strong acid sites on the surfaces. The surface area of catalysts obviously increased after incorporating SnO2. Nanometer S2O8 2-/ SnO2-TiO2composite was used as a catalyst for α-pinene isomerization and the influence of catalyst preparation conditions on its performances were investigated. The optimum condition for superacid catalyst preparation was found to be with 2:1 Sn/Ti mole ratio, S2O8 2-1 mol · L-1 of impregnation consideration and toasting temperature of 773K. With 3％ of S2O8 2-/SnO2-TiO2 catalyst dosage at a reaction temperature at 403K for 2 h, the conversion of α-pinene was 98 ％ and the selectivity to camphene was 62 ％.
nanometer solid superacid α-pinene isomerization catalysis
Chun-hua WU Qian-rong ZHAO Jia-yan ZHANG Dan-dan ZHU
Faculty of Wood Science and Decoration Engineering, Southwest Forestry College, 650224, Kunming,Yunn College of Chemistry and Chemical Engineering, Yunnan Normal University , 650092, Kunming, Yunnan Pr
国际会议
南京
英文
281-286
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）