固体酸举例一1和2.ppt

Sulfated graphene as an efficient solid catalyst for acid-catalyzed liquid reactions Fujian Liu, Jing Sun, Longfeng Zhu, Xiangju Meng, Chenze Qi and Feng-Shou Xiao Department of Chemistry, Zhejiang University Introduction Abstract Graphene with its two-dimensional sheet of sp2-hybridized carbon is a hot topic in the fields of materials and chemistry due to its unique features. Herein, we demonstrate that sulfated graphene is an efficient solid catalyst for acid-catalyzed liquid reactions. The sulfated graphene was synthesized from a facile hydrothermal sulfonation of reduced graphene oxide with fuming sulfuric acid at 180 °C. A highly efficient process for transforming methyl mercaptan into hydrocarbons and H2S on solid acid catalysts Abstract * J. Mater. Chem. , 2012, 22, 5495-5502 The replacement of mineral liquid acids by solid acids for the production of fine chemicals by acid-catalyzed liquid reactions has attracted much attention, due to the obvious advantages of heterogeneous catalysts, including easy separation of the catalyst from the reaction medium, reductive corrosion, and improved regenerability. Typically, solid acids are porous materials such as zeolites, mesoporous materials, ion-exchange resins, and SO3H-functionalized porous carbons. Among these porous solid acids, catalytically active acidic sites are mainly located in the pores of the catalysts, therefore the mass transfer to and from the active sites in the pores plays an important role for catalytic performance, in particular for acid-catalyzed liquid reactions. 举例-2 Applied Catalysis B: Environmental Volumes 134–135, 2 May 2013, Pages 344–348 The catalytic conversion of CH3SH and CH3SCH3 (DMS) on protonic zeolites H-ZSM-5, H-Y and H-ferrierite was studied in a gas flow reactor from 423 to 823?K. Below 700?K, CH3SH is converted at equilibrium into DMS and H2S. Above 700?K, light alkanes (C1–C3), benzene, toluene and xylene appear alongside H2S in the gas phase, and a carbonaceous deposit b