Elsevier

Surface Science

Volume 318, Issue 3, 20 October 1994, Pages 267-280
Surface Science

Synthesis of methanol from a mixture of H2 and CO2 on Cu(100)

https://doi.org/10.1016/0039-6028(94)90101-5Get rights and content

Abstract

The rate of methanol synthesis over a Cu(100) single crystal from a binary mixture of CO2 and H2 has been measured for total pressures of 1–4 bar, various gas compositions ranging from CO2:H2 ratios of 4:1 to 3:17 and a temperature range of 483–563 K. At a pressure of 2 bar and a gas composition of CO2:H2 = 1:1, the apparent activation energy is determined to be 69 ± 4 kJ mol−1 and at 543 K the turnover rate is 2.7 × 10−1 site−1 s−1. The turnover rate is observed to scale with the total pressure as p2.36±0.14 and the turnover rate has a maximum for a mole fraction of H2 of roughly 60%. These results are found to be consistent with a simple model where hydrogenation of dioxomethylene or formaldehyde are the rate limiting step in the methanol synthesis.

References (40)

  • G.C. Chinchen et al.

    Appl. Catal.

    (1987)
  • K. Klier

    Adv. Catal.

    (1982)
  • G.R. Sheffer et al.

    J. Catal.

    (1989)
  • B.S. Clausen et al.

    J. Catal.

    (1991)
  • B.S. Clausen et al.

    Catal. Today

    (1991)
  • G.C. Chinchen et al.

    Appl. Catal.

    (1986)
  • W.R.A.M. Robinson et al.

    Appl. Catal.

    (1990)
  • A. Santoni et al.

    Surf. Sci.

    (1987)
  • I. Alstrup et al.

    Surf. Sci.

    (1992)
  • P.A. Taylor et al.

    Surf. Sci.

    (1992)
  • I. Chorkendorff et al.

    Surf. Sci.

    (1991)
  • P.B. Rasmussen et al.

    Surf. Sci.

    (1993)
  • B.A. Sexton et al.

    Surf. Sci.

    (1985)
  • H.C. Zeng et al.

    Surf. Sci.

    (1986)
  • I. Wachs et al.

    J. Catal.

    (1978)
  • M. Bowker et al.

    Surf. Sci.

    (1980)
  • M. Bowker et al.

    Surf. Sci.

    (1981)
  • B.A. Sexton

    Surf. Sci.

    (1979)
  • O.P. van Pruissen et al.

    Surf. Sci.

    (1987)
  • G.H. Graaf

    The synthesis of Methanol in Gas-Solid and Gas-Slurry Reactors

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    Present address: Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany.

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