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- W1497649302 abstract "The synthesis of methanol from CO and H2 has been studied over unsupported, single-crystal Pd(110) at pressures of 72.3–244 KPa, temperatures of 493–553 K, and a H2CO ratio of 3.9, in a combined high-pressure reactor/UHV surface analysis chamber. At 244 KPa the reaction exhibited linear Arrhenius behavior with an activation energy of 18.4 ± 1.9 kcal/mol, and a pre-exponential factor of 8 × 104 s−1. These values are in good agreement with values reported for supported PdSiO2. At 553 K the reaction was roughly first order in total pressure (1.2 ± 0.2) over the pressure range studied. Specific rates (turnover frequencies) observed in this study, extrapolated to pressures typical of most methanol synthesis work (1-1.5 MPa), are in good agreement with rates observed for Pd dispersed on “noninteracting” supports such as SiO2, and some basic supports such as ZnO and MgO. These rates are higher than those observed over Pd supported on zeolite and acidic supports (e.g., PdNaY and Al2O3), but much lower than those observed on highly active La2O3-supported Pd. In addition, no dimethyl ether product was detected on Pd(110), though it is a significant product on many acidic supports. Thus, Pd metal is an active methanol synthesis catalyst, and no specific support interaction is required. Highly interacting supports exhibit rates and/or selectivities substantially different from those of Pd(110)." @default.
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- W1497649302 date "1987-12-01" @default.
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- W1497649302 title "The activity of Pd(110) for methanol synthesis*1" @default.
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- W1497649302 doi "https://doi.org/10.1016/0021-9517(87)90185-0" @default.
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