Dimethyl ether synthesis via CO2 hydrogenation over CuO-TiO2-ZrO2/HZSM-5 bifunctional catalysts

A series of CuO–TiO2–ZrO2 catalysts with various Ti and Zr molar ratios were prepared by co-precipitation method and characterized by N2 physisorption, X-ray diffraction (XRD) and temperature-programmed reduction of hydrogen (H2-TPR). The prepared CuO–TiO2–ZrO2 samples were mixed physically with HZSM-5 zeolite to synthesize dimethyl ether (DME) via CO2 hydrogenation. The results indicated that CuO–TiO2–ZrO2/HZSM-5 had higher CO2 conversion and DME yield compared to CuO–TiO2/HZSM-5 and CuO–ZrO2/HZSM-5 catalyst, in which the catalyst with equimole of Ti and Zr got the best performance. The activities of CuO–TiO2–ZrO2/HZSM-5 catalysts were well correlated to the reduction properties of CuO–TiO2–ZrO2 samples. 2009 Published by Elsevier B.V.

[1]  A. Wokaun,et al.  Methanol synthesis reactions over a CuZr based catalyst investigated using periodic variations of reactant concentrations , 2001 .

[2]  M. Rhodes,et al.  The effects of zirconia morphology on methanol synthesis from CO and H2 over Cu/ZrO2 catalysts: Part I -- Steady-State Studies , 2005 .

[3]  Francesco Frusteri,et al.  Synthesis, characterization and activity pattern of Cu–ZnO/ZrO2 catalysts in the hydrogenation of carbon dioxide to methanol , 2007 .

[4]  Dongsen Mao,et al.  Vapor-phase Beckmann rearrangement of cyclohexanone oxime over B2O3/TiO2-ZrO2 , 2003 .

[5]  A. Kozłowska,et al.  Effect of Mg and Mn oxide additions on structural and adsorptive properties of Cu/ZnO/ZrO2 catalysts for the methanol synthesis from CO2 , 2003 .

[6]  Heechul Choi,et al.  Synthesis and characterization of ZrO2–TiO2 binary oxide semiconductor nanoparticles: Application and interparticle electron transfer process , 2007 .

[7]  M. Rhodes,et al.  The effects of zirconia morphology on methanol synthesis from CO and H2 over Cu/ZrO2 catalysts: Part II -- Transient-Response Infrared Studies , 2005 .

[8]  D. Wayne Goodman,et al.  Synthesis of dimethyl ether (DME) from methanol over solid-acid catalysts , 1997 .

[9]  Y. Nitta,et al.  Effect of starting salt on catalytic behaviour of Cu-ZrO2 catalysts in methanol synthesis from carbon dioxide , 1993 .

[10]  A. Baiker,et al.  Copper- and Silver–Zirconia Aerogels: Preparation, Structural Properties and Catalytic Behavior in Methanol Synthesis from Carbon Dioxide , 1998 .

[11]  Jinfu Wang,et al.  Dimethyl Ether Synthesis from CO 2 Hydrogenation on a CuO−ZnO−Al 2 O 3 −ZrO 2 /HZSM-5 Bifunctional Catalyst , 2008 .

[12]  E. I. Ko,et al.  Strategies in Controlling the Homogeneity of Zirconia-Silica Aerogels: Effect of Preparation on Textural and Catalytic Properties , 1994 .

[13]  Zhang Bin,et al.  Highly effective hybrid catalyst for the direct synthesis of dimethyl ether from syngas with magnesium oxide-modified HZSM-5 as a dehydration component , 2005 .