Catalysts for the Formation of Alcohols from Carbon Monoxide and Hydrogen

Frolich, Per; Cryder, D.

doi:10.1021/ie50250a013

Cited by 31 publications

(11 citation statements)

References 10 publications

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“…A maximum butanol selectivity occurred for the catalyst containing 0.5% K2CO3; at this maximum the butanol selectivity was about twice that of the unpromoted catalyst. The distribution of the alcohols was similar to that reported in other work (Frolich and Cryder, 1930; Natta et a]. , 1957).…”

Section: Promoter Concentration Effectssupporting

confidence: 90%

The higher alcohol synthesis over promoted Cu/ZnO catalysts

1983

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Alkali oxides added to methanol catalysts increase the formation of ethanol, n‐propanol and isobutyl alcohol. This result has been known for many years, yet few quantitative studies have been reported in the literature. Data obtained on a commercial copper‐zinc oxide catalyst promoted with K2 CO3 are presented and compared with published work. The optimum promoter concentration was about 0.5% by weight. The H2 to CO feed ratio was important in determining the higher alcohol selectivity. The rate of production of isobutyl alcohol varied as p H2−0.7 p CO2.2 while for methanol, ethanol and n‐propanol both exponents were positive and less than 1.6. Decreasing the hydrogen to carbon monoxide ratio from 2 to 0.5 more than doubled the isobutyl alcohol selectivity. Chain growth schemes predicting the higher alcohol selectivity are presented and estimates of the parameters are given.

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Section: Promoter Concentration Effectssupporting

confidence: 90%

The higher alcohol synthesis over promoted Cu/ZnO catalysts

1983

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“…In the fist of these, Anderson et al [44] described mainly the work done by Frohlich and Cryder [45] who had measured the conversion of CO as a function of the space velocity. From those measurements, Frohlich and Cryder drew the conclusion that methanol is a primary product and that higher alcohols are formed by subsequent reactions.…”

Section: Mechanisms Proposed Before I950mentioning

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 synergistic effect between Cu and ZnO has been known to promote the methanol synthesis (MS) from syngas [42][43][44][45]. The basicity enhancement, usually by alkali-modification, of MS catalysts can lead to the formation of higher alcohols from syngas [27,28,46]. However, only a K-Zn-Cr-oxide catalyst [20] was reported previously to produce C 2+ oxygenates from methanol at a selectivity significantly lower than that of Cu-ZnO/d-HT catalyst in this study.…”

Section: Resultsmentioning

confidence: 99%

Methanol to Long-chain Oxygenates Over Mg/Al Mixed Oxides Supported Cu Catalysts

Hsiao

Lin

2007

Catal Lett

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The synthesis of long-chain oxygenates (C 2+ ) from methanol is examined at atmospheric pressure and 523-673 K. The Cu-ZnO/d-HT (decomposed hydrotalcite) catalyst shows ca. 10% yield of C 2+ at 573 K and a weight hourly space velocity of 0.2 h -1 ; whereas, no C 2+ is formed over Cu/d-HY, Cu-MgO/Al 2 O 3 , Cu-ZnO/Al 2 O 3 , or a commercial Cu/ZnO methanol synthesis catalyst. The role of the synergistic effect of Cu, ZnO and the basicity of d-HT and the possible reaction intermediates for the C 2+ synthesis are discussed.

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Catalysts for the Formation of Alcohols from Carbon Monoxide and Hydrogen

Cited by 31 publications

References 10 publications

The higher alcohol synthesis over promoted Cu/ZnO catalysts

The higher alcohol synthesis over promoted Cu/ZnO catalysts

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

Methanol to Long-chain Oxygenates Over Mg/Al Mixed Oxides Supported Cu Catalysts

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