α–Pinene Isomerization Catalyzed by a Nanometer Solid Superacid

Chun Hua Wu; Qian Rong Zhao; Jia Yan Zhang; Dan Dan Zhu; Guan Ben Du

doi:10.4028/www.scientific.net/AMR.295-297.156

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 295-297α–Pinene Isomerization Catalyzed by a Nanometer...

α–Pinene Isomerization Catalyzed by a Nanometer Solid Superacid

Abstract:

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 a-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^-¹of 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 a-pinene was 98 % and the selectivity to camphene was 62 %.

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Advanced Materials Research (Volumes 295-297)

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156-160

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https://doi.org/10.4028/www.scientific.net/AMR.295-297.156

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July 2011

Authors:

Chun Hua Wu, Qian Rong Zhao, Jia Yan Zhang, Dan Dan Zhu, Guan Ben Du

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A-Pinene, Catalysis, Isomerization, Nanometer Solid Superacid

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