Effects of zirconia phase on the synthesis of methanol over zirconia-supported copper
- LBNL Library
A study has been conducted to identify the influence of zirconia phase and copper to zirconia surface area on the activity of Cu/ZrO2 catalysts for the synthesis of methanol from either CO/H2 or CO2/H2. To determine the effects of zirconia phase, a pair of Cu/ZrO2 catalysts were prepared on tetragonal (t-) and monoclinic (m-) zirconia. The zirconia surface area and the Cu dispersion were essentially identical for these two catalysts. At 548 K, 0.65 MPa, and H 2/COx (x=1,2)=3, the catalysts prepared on m-ZrO2 was 4.5 times more active for methanol synthesis from CO2/H2 than that prepared on t-ZrO2, and 7.5 times more active when CO/H2 was used as the feed. Increasing the surface area of m-ZrO2 and the ration of Cu to ZrO2 surface areas further increased the methanol synthesis activity. In situ infrared spectroscopy and transient-response experiments indicate that the higher rate of methanol synthesis from Co2/H2 over Cu/m-ZrO2 is due solely to the higher concentration of active intermediates. By contrast, the higher rate of methanol synthesis from Co/H2 is due to both a higher concentration of surface intermediates and the more rapid dynamics of their transformation over Cu/ZrO2.
- Research Organization:
- Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
- Sponsoring Organization:
- USDOE Director, Office of Science. Office of Basic Energy Sciences. Division of Chemical Sciences (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 819461
- Report Number(s):
- LBNL--49410
- Journal Information:
- Catalysis Letters, Journal Name: Catalysis Letters Journal Issue: 1-2 Vol. 80; ISSN CALEER; ISSN 1011-372X
- Country of Publication:
- United States
- Language:
- English
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