Promotion of methanol synthesis over Cu/ZnO catalysts by doping with caesium

Nunan, John; Klier, K.; Young, C.-W.; Himelfarb, P.B.; Herman, R.G.

doi:10.1039/c39860000193

Cited by 43 publications

(28 citation statements)

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“…Doping with heavy alkali is known to enhance the activity of Cu/ZnO catalysts [Klier et al, 1984;Nunan et al, 1986;Bybell et al, 1986;Nunan et al, 1988;. The present study has demonstrated the large enhancement of methanol productivity of Cu/ZrOz catalysts bycesium doping.…”

Section: Discussionsupporting

confidence: 51%

“…Catalyst. Since cesium doping is known to enhance the productivity of methanol over Cu/ZnO catalysts [Klier et al, 1984;Nunan et al, 1986;Bybell et al, 1986;Nunan et al, 1988], this effect was investigated over the Cu/Zr02 = 10/90 catalyst by doping the catalyst with 3 mol% Cs. Data obtained from both the doped and undoped 10/90 Cu/Zr02 catalysts as a function of reaction temperature are presented in Figure 10.…”

Section: -1mentioning

confidence: 99%

“…It was found that methanol yields could be greatly enhanced by the addition of small amounts of C02 and H20 to the synthesis gas feed Vedage et al, 1984a;Vedage et al, 1984b]. Doping Cu/ZnO catalysts with cesium has also been reported to increase the productivities of methanol and higher alcohols, especially isobutanol [Nunan et al, 1988;Nunan et al, 1986;Bybell et al, 1986;Klier et al, 1984].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Oxygenates vs. synthesis gas

Klier¹,

Herman²,

Groppi³

et al. 1999

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Section: Discussionsupporting

confidence: 51%

Section: -1mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Oxygenates vs. synthesis gas

Klier¹,

Herman²,

Groppi³

et al. 1999

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“…The formation of methyl esters together with that of the higher alcohols was not described before. Nunan et al [53] argued that the method of formation of methyl formate differs from that of the other methyl esters and proposed that it is formed from methanol and CO by the reaction:…”

Section: The Aldol Condensation Mechanismmentioning

confidence: 99%

The synthesis of higher alcohols using modified Cu/ZnO/Al2O3 catalysts

1992

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This paper gives a review of research work in the synthesis of higher alcohols over catalysts based on Cu/ZnO/Al,O,, emphasizing three main topics: (i) the effect on selectivity of the addition of several compounds to this catalyst, (ii) the effect on selectivity of the reaction conditions used, and (iii) the reaction network leading to the different products found. Although the use of aLkali compounds has been studied most extensively, other corn~un~, for example those containing manganese, also appear to be promising additives. The process conditions are rather critical and this may cause some practical difficulties in industrial plants. An extended aldol condensation mechanism is proposed which can explain the product distribution found.

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“…The Langmuir-Hinshelwood type model is based on surface reactions of formyl species at 280 o C and 10 MPa, which is denoted as equation (1) Several factors have been found that affect the amounts of the impurities. The higher alcohol amounts can be lowered by decreasing the alkali amount on the catalyst [38,39], increasing the space velocity [34], increasing H 2 /CO ratio [36], and decreasing methanol partial pressure [4]. It has been reported that synthesis of higher alcohols are favored within 553-583 K over Cu-based catalysts with promotors [32].…”

Section: Kinetics Of Ethanol Formationmentioning

confidence: 99%

Revisiting Catalyst Structure and Mechanism in Methanol Synthesis

Wu¹,

Cole²,

Fang³

et al. 2017

JAN

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Abstract. Methanol synthesis is a mature industrial process, where industrial Cu/ZnO/Al 2 O 3 catalyst is commonly used. Howerver, function of the active catalyst component and reaction mechanism is still vague. In this contribution, the function of each catalyst component including the synergy between Cu and ZnO, reaction mechanism including carbon source of methanol, key intermediates and elementary steps, and kinetics of methanol synthesis and impurities formation are discussed based on the latest literature survey.

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Promotion of methanol synthesis over Cu/ZnO catalysts by doping with caesium

Cited by 43 publications

References 1 publication

Oxygenates vs. synthesis gas

Oxygenates vs. synthesis gas

The synthesis of higher alcohols using modified Cu/ZnO/Al2O3 catalysts

Revisiting Catalyst Structure and Mechanism in Methanol Synthesis

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