ChemInform Abstract: Hydrogenation of Carbon Monoxide over Rhodium/Silica Catalysts Promoted with Molybdenum Oxide and Thorium Oxide.

Kip, BJ; Hermans, Egf; Wolput, J.H.M.C. van; Hermans, Nmagj; Grondelle, J. van; Prins, R.

doi:10.1002/chin.198814078

Cited by 2 publications

(4 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In these compounds, the carbon -end of the carbonyl is bound to a middle or late transition metal while the oxygen -end is bound to an early transition metal in a high oxidation state (56). The vibrational frequencies of the carbonyl group in these compounds (56) are similar to those reported in studies by Sachtler and Ichikawa (43) as well as others (50,(57)(58)(59)(60) (81). The reactions involving hydrogenation of C-0 bonds (C02 hydrogenation and acetone hydrogenation) were promoted by the deposits of titanium oxide.…”

Section: Catalytic Behaviorsupporting

confidence: 80%

“…This has been done using HREELS for CO adsorbed to MnOx promoted Ni(111) (57) and using infrared spectroscopy for CO adsorbed to oxide promoted supported catalysts ( 43,50,(58)(59)(60). A limitation of HREELS is that the technique is not applicable in the pressure region of catalytic interest.…”

Section: Implications and Limitationsmentioning

confidence: 99%

“…This type of bonding in the C and 0 bonded carbonyl compounds leads to a significant weakening of the CO bond as indicated by a lowering in CO stretching frequencies of up to 500 cm-1 (56). Substantial decreases in the CO stretching frequencies have also been observed in oxide promoted Rh catalysts (50,(57)(58)(59)(60). This leads to a scheme for promotion that builds upon elements which have been previously proposed by Burch and Flambard (51) and by Sachtler, Ichikawa and coworkers (43,55).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Transition metal oxides deposited on rhodium and platinum: Surface chemistry and catalysis

Boffa

1994

View full text Add to dashboard Cite

Section: Catalytic Behaviorsupporting

confidence: 80%

Section: Implications and Limitationsmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Transition metal oxides deposited on rhodium and platinum: Surface chemistry and catalysis

Boffa

1994

View full text Add to dashboard Cite

“…Carbon monoxide dissociation is a rate-determining and rate-limiting step, and the promoter's primary function is to increase carbon monoxide dissociation. 47 Therefore, it increases the rate of a methanol synthesis reaction. Based on the standard reduction potentials of Cu and Zn, as given in Eqn (15), Cu should ideally be metallic while Zn should be oxide.…”

Section: Discussion Of the Reaction Mechanism For Methanol Synthesismentioning

confidence: 99%

Significance and influence of various promoters on Cu‐based catalyst for synthesizing methanol from syngas: a critical review

Saw

Datta

Chavan

et al. 2023

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

Methanol synthesis from syngas is an effective method for producing fuel additives, oxygenated fuels, and other chemicals. Several promoted catalytic systems have been tested for the synthesis of methanol. Catalysts based on noble metals are extremely active in generating methanol from syngas. However, sintering, poisoning, and related expenses accounted for the switch to Cu-based catalysts. The promotion of Cu-based catalysts, even with small doses of an effective promoter, resulted in a considerable change in product selectivity. A suitable promoter is required for Cu-based catalysts used in the synthesis of methanol because it significantly impacts the electronic, geometric, or acid/base surface properties, which in turn affect the catalyst's activity and selectivity. It also significantly impacts the interactions between the catalyst's active ingredients. However, the interactions between the active component and the promoter can be adjusted or influenced by appropriate support. The present paper primarily focuses on several promoters in the copper-based catalyst for synthesizing methanol from syngas. We briefly deliberated on the need for copper-based catalysts for methanol synthesis, their reaction and mechanism, the reasons for promoter addition concerning their role and influence, the importance of CO 2 addition in feed synthesis gas and their impact on the catalyst. This paper mainly highlights the selectivity and activity of various promoted Cu-based catalysts, although different reaction parameters are the cause of promotion and inhibition in the catalyst. The effects of reaction conditions, including pressure, temperature, gas hourly space velocity (GHSV), and syngas composition, are briefly reported. This paper also comprehensively compares the effects of adding various promoters in small amounts to copper-based catalysts. This review intends to be illustrative rather than exhaustive.

show abstract

ChemInform Abstract: Hydrogenation of Carbon Monoxide over Rhodium/Silica Catalysts Promoted with Molybdenum Oxide and Thorium Oxide.

Cited by 2 publications

References 1 publication

Transition metal oxides deposited on rhodium and platinum: Surface chemistry and catalysis

Transition metal oxides deposited on rhodium and platinum: Surface chemistry and catalysis

Significance and influence of various promoters on Cu‐based catalyst for synthesizing methanol from syngas: a critical review

Contact Info

Product

Resources

About