Methanation of carbon monoxide and dioxide by supported metal carbonyl clusters

Ferkul, Helen E.; Berlie, J. M.; Stanton, Deborah J.; McCowan, James D.; Baird, Michael C.

doi:10.1139/v83-231

Cited by 27 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…mechanism, these data suggest that the reversible substitution of a chloride ligand on PtCl42" by alcohol must occur prior to reduction of PtCl42". /3-Hydride elimination would ultimately lead to formation of Pt°and the carbonyl product; this has been directly observed for the reaction of (PPh3)2 PtCl2 with alcohol.15 HOCHR,R2 + PtCl42" z=£ PtCl3OCHR,R22" + CL - Pt°+ 20" + 2HC1 + R,C(=0)R2 (2) The stoichiometry of reaction 2 is supported by a 94% yield of acetone when a 4 mM solution of K2PtCl4 with 1 equiv of 2-propanol in H20 reacts under dark conditions. The necessity of a proton on the -carbon is demonstrated by a lack of reactivity when ferf-butyl alcohol is employed as the reducing agent.…”

Section: Resultsmentioning

confidence: 80%

Multielectron-photoinduced reduction of chloroplatinum complexes: visible light deposition of platinum metal

Cameron

Bocarsly

1986

Inorg. Chem.

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 80%

Multielectron-photoinduced reduction of chloroplatinum complexes: visible light deposition of platinum metal

Cameron

Bocarsly

1986

Inorg. Chem.

View full text Add to dashboard Cite

“…Anchoring RuCl 3 by impregnation on inorganic supports was reported in several instances to result in a catalyst for the reaction. More recently, it was shown that the use of ruthenium dodecacarbonyl in place of the mononuclear complex enhanced not only the conversion of C0 2 , but also the selectivity toward CH,, production (14,15). Fur thermore, these cluster derived catalysts were found to have longer life and to give better conversion to methane at lower temperatures than their mononuclear counter parts.…”

Section: Diffuse Reflectance Cellmentioning

confidence: 99%

New Methods for Acquiring IR Spectral Data in Organometallic Chemistry and Catalysis

Darensbourg

Gibson

1987

ACS Symposium Series

View full text Add to dashboard Cite

The advent of new infrared sampling accessories has allowed in situ study of organometallic systems under conditions that were previously not readily accessible. The techniques of Cylindrical Internal Reflectance (CIR) and Diffuse Reflectance spectroscopies are described herein. The CIR phenomenon was employed in three different apparatus. Two different high pressure CIR cells were used to study reactions homogeneously catalyzed by [μ-HW 2 (CO)10]-. Low temperature reactions of Mo and W complexes were studied using an ambient pressure CIR cell. The diffuse reflectance technique was employed to study powdered samples of Ru carbonyl complexes supported on A1 2 O 3 .It would be a vast understatement to assert that infrared spectro scopy has played a major role in the characterization of organo metallic derivatives, in particular metal carbonyls (1,2). Hence, a discussion of the role of infrared spectroscopy in organometallic chemistry and catalysis in our introductory comments will be avoided. Nevertheless, it is unquestionably true that the enhanced signal/noise available via FTIR has dramatically changed IR spec troscopy. As the technology has changed, the accessories for sampling have changed (3). These in turn have resulted in a significant impact on the type and quality of experiments that can be readily performed.We wish to describe in this chapter some of the new and innov ative infrared accessories commercially available to the exper imental chemist. All of the infrared items described herein were obtained from Spectra Tech, Inc. (652 Glenbrook Road, P. 0. Box 2190-G, Stanford, CT 06906, Ph. (800)243-9186).The conditions for which we have demonstrated the use of these devices involving in situ infrared spectroscopy include the following:• High pressure and high temperature solution phase reactions carried out in both batch-mode or flow-through reactors.

show abstract

“…But, due to the activation barrier for reducing CO to CH 4 by hydrogen, methanation kinetics is favored at high temperatures. The temperature range of catalytic methanation is reported to be around 200-400°C, depending on the composition and properties of catalyst [7][8][9]. The traditional methanation catalyst is Ni supported on alumina (Al 2 O 3 ) [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nonthermal Plasma on the Methanation of Carbon Monoxide over Nickel Catalyst

Mok

Kang

Lee

et al. 2010

Plasma Chem Plasma Process

View full text Add to dashboard Cite

Reduction of carbon monoxide to methane by hydrogen was investigated with a nonthermal plasma reactor in which Ni/alumina catalyst pellets was filled. The effect of reaction temperature, pressure and voltage on the conversion of CO was examined. It was found that the nonthermal plasma significantly enhanced the catalytic conversion of CO. The effect of the nonthermal plasma was especially remarkable at lower temperatures and pressures. At high temperatures, the catalyst itself exhibited very high catalytic activity for the conversion of CO. Since high pressure is unfavorable for creating electrical discharge plasma, the increase in pressure lowered the discharge power, thereby weakening the effect of the nonthermal plasma. With the nonthermal plasma alone, there was no conversion of CO. The reaction products identified by FTIR spectra were CH 4 , CO 2 and H 2 O. FTIR spectra also showed that CO was converted primarily into CH 4 with high selectivity above 90% at most experimental conditions.

show abstract

Methanation of carbon monoxide and dioxide by supported metal carbonyl clusters

Cited by 27 publications

References 9 publications

Multielectron-photoinduced reduction of chloroplatinum complexes: visible light deposition of platinum metal

Multielectron-photoinduced reduction of chloroplatinum complexes: visible light deposition of platinum metal

New Methods for Acquiring IR Spectral Data in Organometallic Chemistry and Catalysis

Effect of Nonthermal Plasma on the Methanation of Carbon Monoxide over Nickel Catalyst

Contact Info

Product

Resources

About