Abstract
Catalysts have been prepared by precipitating different amounts of ZnO on the surface of skeletal copper particles. The precursor copper catalysts were prepared by fully leaching CuAl2 particles with concentrated NaOH solutions in the presence and absence of sodium chromate. The resulting catalysts contained surface zinc oxide concentrations in the range 0-1.36 mg per m2 of catalyst surface.
The influence of different concentrations of ZnO on the surface of skeletal copper was examined by the hydrogenation of CO2 using a mixture of 24% CO2/76% H2 at 4 MPa, 493-533K and space velocities up to 410 700 h-1. The catalysts were found to be highly active and selective for methanol synthesis. Methanol synthesis activity increased linearly with ZnO loadings with a maximum being reached at a loading of around 1.1 mg m-2 for higher surface area skeletal copper prepared by leaching in the presence of chromate. ZnO loadings were also shown to improve the selectivity of CO2 hydrogenation over copper by reducing the formation of CO by the reverse water-gas shift reaction.
Similar content being viewed by others
References
G.J. Millar, C.H. Rochester and K.C. Waugh, Catal. Lett. 14 (1992) 289.
Y. Nitta, O. Suwata, Y. Ikeda, Y. Okamoto and T. Imanaka, Catal. Lett. 26 (1994) 345.
J.S. Lee, K.I. Moon, S.H. Lee, S.Y. Lee and Y.G. Kim, Catal. Lett. 34 (1995) 93.
K. Hagihara, H. Mabuse, T. Watanabe and M. Saito, Catal. Today 36 (1997) 33.
T. Inui, H. Hara, T. Takeguchi and J.B. Kim, Catal. Today 36 (1997) 25.
I.A. Fisher, H.C. Woo and A.T. Bellk, Catal. Lett. 44 (1997) 11.
T. Kakumoto and T. Watanabe, Catal. Today 36 (1997) 39.
M. Saito, J. Wu, S. Luo, J. Toyir, M. Takeuchi and T. Watanabe, in: Greenhouse Gas Control Technologies, eds. P. Riemer, B. Eliasson and A. Wokaun (Elsevier Science, 1999) p. 337.
J. Wu, M. Saito and H. Mabuse, Catal. Lett. 68 (2000) 55.
M. Saito, M. Takeuchi, T. Fujitani, T. Watanabe and Y. Kanai, Special Number/1995 Intern. Chem. Cong. of Pacific Basin Soc. and Tech. Envir. Symp. 06-L, 21 (1995) 83.
T. Fujitani, M. Saito, Y. Kanai, M. Takeuchi, K. Moriya, T. Watanabe, M. Kawai and T. Kakumoto, Chem. Lett. Chem. Soc. Japan (1993) 1079.
G.C. Chinchen, P.J. Denny, J.R. Jennings, M.S. Spencer and K.C. Waugh, Appl. Catal. 36 (1988) 1.
L. Ma and M.S. Wainwright, Appl. Catal. A: General 187 (1999) 89.
D. Wang, L. Ma, C.J. Jiang, D.L. Trimm, M.S. Wainwright and D.H. Kim, Stud. Surf. Sci. Catal. 101 (1996) 1379.
L. Ma, D.L. Trimm and M.S. Wainwright, Topics Catal. 8 (1999) 271.
J.W. Evans, M.S. Wainwright, A. Bridgewater and D.J. Young, Appl. Catal. 7 (1983) 75.
L. Ma, B. Gong, T. Tran and M.S. Wainwright, Catal. Today 63 (2000) 499.
A.F. Wells, Structural Inorganic Chemistry, 5th edn (Clarendon Press, Oxford, 1984) p. 538.
G.C. Chinchen, K.C. Waugh and D.A. Whan, Appl. Catal. 25 (1986) 101.
G.C. Chinchen and M.S. Spencer, Catal. Today 10 (1991) 293.
R. Burch and S.E. Golunski, J. Chem. Soc. Faraday Trans. 86 (1990) 2683.
R. Burch, R.J. Chappell and S.E. Golunski, Catal. Lett. 1 (1988) 439.
R. Burch, S.E. Golunski and M.S. Spencer, Catal. Lett. 5 (1990) 55.
G.J. Millar, C.H. Rochester and K.C. Waugh, J. Chem. Soc. Faraday Trans. 88 (1992) 1033, 2257, 3497.
G.J. Millar, C.H. Rochester, S. Bailey and K.C. Waugh, J. Chem. Soc. 88 (1992) 2085.
J.E. Bailie, C.H. Rochester and G.J. Millar, Catal. Lett. 31 (1995) 333.
G.J. Millar, C.H. Rochester, S. Bailey and K.C. Waugh, J. Chem. Soc. Faraday Trans. 89 (1993) 1109.
Y. Kanai, T. Watanabe, T. Fujitani, M. Saito, J. Nakamura and T. Uchijima, Catal. Lett. 27 (1994) 67.
T. Fujitani, M. Saito, Y. Kanai, T. Watanabe, J. Nakamura and T. Uchijima, Chem. Lett. Chem. Soc. Japan (1994) 1877.
J. Nakamura, T. Uchijima, Y. Kanai and T. Fujitani, Catal. Today 28 (1996) 223.
Y. Kanai, T. Watanabe, T. Fujitani, M. Saito, T. Uchijima and J. Nakamura, Catal. Lett. 38 (1996) 157.
T. Fujitani, T. Matsuda, Y. Kushida, S. Ogihara, T. Uchijima and J. Nakamura, Catal. Lett. 49 (1997) 175.
T. Fujitani and J. Nakamura, Catal. Lett. 56 (1998) 119.
M.S. Spencer, Catal. Lett. 50 (1998) 37.
J. Nakamura, I. Nakamura, T. Uchijima, T. Watanabe and T. Fujitani, Stud. Surf. Sci. Catal. 101 (1996) 1389.
T. Fujitani, T. Uchijima and J. Nakamura, Surf. Sci. 383 (1997) 285.
I. Nakamura, Y. Nakano, T. Fujitani, T. Uchijima and J. Nakamura, Surf. Sci. 402 (1998) 92.
H.Y. Chen, L. Chen, J. Lin and K.L. Tan, J. Phys. Chem. B 102 (1998) 1994.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Ma, L., Tran, T. & Wainwright, M.S. Hydrogenation of CO2 Over Skeletal Copper Surfaces Containing Precipitated ZnO. Topics in Catalysis 22, 287–293 (2003). https://doi.org/10.1023/A:1023540406916
Issue Date:
DOI: https://doi.org/10.1023/A:1023540406916