Hydrogenation of CO over

Goodman D W, Kelley R D, Madey T E and Yates J T Jr 1980 Kinetics of the hydrogenation of CO over a single crystal nickel catalyst J. Catal. 63 226... 

The chemical complex includes the methanol plant, methyl acetate plant, and acetic anhydride plant. The methanol plant uses the Lurgi process for hydrogenation of CO over a copper-based catalyst. The plant is capable of producing 165,000 t/yr of methanol. The methyl acetate plant converts this methanol, purchased methanol, and recovered acetic acid from other Eastman processes into approximately 440,000 t/yr of methyl acetate. 

The bulk of this review concerns transient experiments on heterogeneous catalysis at atmospheric pressure. After some comments on current methods for doing the experiments, the application of the method will be illustrated by two examples the oxidation of CO over Pt, and the hydrogenation of CO over Fe. 

Wu, Yuan and Xu have studied nonuniform pellets in the hydrogenation of CO over Ni on alumina supports.39 Selectivity is directly related to the CO/H2 ratio inside the pellets. The active Ni particles were deposited as a narrow band in order to approximate a Dirac delta distribution. Experimental data followed theoretical predictions of the researchers regarding enhanced selectivity to... 

Sabatier P, Senderens JB. Hydrogenation of CO over nickel to produce methane. Hebd Seances Acad Sci. 1902 134 514. 

Yu. M. Serov, O.S. Gur yanova, S.G. Gul yanova, and V.M. Gryaznov, Hydrogenation of CO over hydrogen permeable membrane catalysts at atmospheric pressure, Chem. Synthesis Based on Cl Molecules. Abstracts of papers of Vsesouzn. Conf. Moscow, Topchiev Inst, of Petrochemical Synthesis, 1984, p. 28. 

HYDROGENATION OF CO OVER MOLYBDENUM-ZEOLITES YOU-SING YONG and R.F. HOWE... 

Methane, acetic acid, acetaldehyde, and ethanol constitute approximately 90 carbon atom percent of the primary products from the hydrogenation of CO over Rh/SiO and Rhr-Mn/SiOi catalysts at 250 -300°C and 30-200 atm pressure in a back-mixed reactor with H /CO = 1. The rate of reaction and the ratio, CHj /C chemicals, vary with (Pjy / The addition of 1% Mn raises the synthesis rate of a 2.5% Rh/SiOfi catalyst about tenfold. The kinetics and the product distribution are consistent with a mechanism in which CO is adsorbed both associatively and dissodatively. The surface carbon produced by the dissociative CO chemisorption is hydrogenated through a Rh-CHs intermediate, and CO insertion in that intermediate results in formation of surface acetyl groups. 

Dursun, G. and Winterbottom, J.M. (1998) Catalytic hydrogenation of CO over the doped perovskite oxide YBa2Cu30(7, ). 

Wang, L.P., MiUman, W.S., and Tysoe, W.T. The hydrogenation of CO over molybdenum/alumina in the presence of ethylene coupling of olefin metathesis and CO hydrogenation. Catal. Lett. 1988, 7, 159-167. 

Fujitani, T Nakamura, L Uchijima, T Nakamura, J. The kinetics and Mechanism of Methanol Synthesis by Hydrogenation of CO over a Zn-Deposited Cu( 111) Surface. Surf Sci. 1997, 383,285-298. 

Chang, F.-W. Isay, M.-T S.-P. Liang. Hydrogenation of CO over Nickel Catalysts Supported on Rice Husk ash Prepared by Ion Exchange. Appl. Catal. A Gen. 2001, 209,217-227. 

Here we wish to report that the support acidity, investigated through IR spectroscopy of adsorbed CO, allows one to tune the selectivity towards different products in the hydrogenation of citral over Cu catalysts. 

Cutlip and Kenney (44) have observed isothermal limit cycles in the oxidation of CO over 0.5% Pt/Al203 in a gradientless reactor only in the presence of added 1-butene. Without butene there were no oscillations although regions of multiple steady states exist. Dwyer (22) has followed the surface CO infrared adsorption band and found that it was in phase with the gas-phase concentration. Kurtanjek et al. (45) have studied hydrogen oxidation over Ni and have also taken the logical step of following the surface concentration. Contact potential difference was used to follow the oxidation state of the nickel surface. Under some conditions, oscillations were observed on the surface when none were detected in the gas phase. Recently, Sheintuch (46) has made additional studies of CO oxidation over Pt foil. 

Hexamethylenediamine, 1,6 Hexanediamine (HMDA). H2N(CH2) NH2 mw 116.24, N 24.10% silk-like leaves, mp 42° bp 205° (subl), sol in water si sol in h eth. Prepd by hydrogenation of adiponitrile over Raney Ni or Co chlorination of butadiene then reactn with NaCN hydrogenation. Acute local irritant-mod flame hazard. Used in high polymer synth as a cross-linking agent (Refs 1, 3 4)... 

Similar to hydrogenation of CO, we are mostly interested in periodic (relative) changes in catalytic behavior of transition metals. Specifically, we choose the sequence from Pt to Ni and further to Fe or W, the latter two being simulated as the same model metal Fe/W [with the model parameters averaged over the (close) parameters of real Fe and W], The BOC-MP calculations have been made for the smoothest (most densely packed) surfaces, namely, fee Pt(Ill), Ni(lll), and bcc Fe/W(110). 

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