Hydrogenation of carbon dioxide over copper-pyrochlore/zeolite composite catalysts

Fujiwara, Masahiro; Kieffer, R.; Udron, L.; Ando, Hisanori; Souma, Yoshie

doi:10.1016/0920-5861(95)00302-9

Cited by 7 publications

(4 citation statements)

References 9 publications

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“…The selectivity of carbon monoxide was predominant, and isobutane was not detected. As pointed out in our previous papers, − the common Cu−Zn-based catalyst is not advantageous to the composite catalyst.…”

Section: Resultsmentioning

confidence: 75%

“…The reaction path of the hydrocarbon synthesis over the composite catalyst system is shown in Scheme . − In the present case, at first, carbon dioxide is hydrogenated to methanol over the Fe−Zn−Zr catalyst, followed by the conversion of methanol to hydrocarbons in the acidic sites of the zeolite according to the mechanisms of chain growth . It seems that isobutane is obtained from isobutylene by hydrogenation over Fe−Zn−Zr catalyst or hydrogen-transfer reaction over zeolite .…”

Section: Resultsmentioning

confidence: 84%

“…The composite catalyst systems comprised of methanol synthesis catalysts and zeolite catalysts are generally successful in the hydrogenation of carbon monoxide. − This system is especially advantageous for production of C 2+ hydrocarbons with the low productivity of methane, because the lowest hydrocarbon formed by the methanol-to-gasoline (MTG) reaction by zeolite is, in principle, ethylene . However, the productivity of C 2+ hydrocarbons is poor in almost all composite catalysts reported, even when they are effective in the hydrogenation of carbon monoxide. − We have revealed that common Cu-based methanol synthesis catalysts prepared by coprecipitation were disadvantageous to the composite catalysts. − After various examinations, we made a breakthrough in the composite catalyst effective for the hydrogenation of carbon dioxide. Fe−Zn catalyst was a profitable component of the composite catalyst. , This catalyst system produced C 2+ hydrocarbons with good selectivity and a considerable ratio of olefins.…”

Section: Introductionmentioning

confidence: 99%

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Syntheses of Isobutane and Branched Higher Hydrocarbons from Carbon Dioxide and Hydrogen over Composite Catalysts

Tan

Fujiwara

Ando

et al. 1999

Ind. Eng. Chem. Res.

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The hydrogenation of carbon dioxide was examined over various composite catalysts composed of Fe-Zn-M catalyst and zeolite. Fe-Zn-Zr/HY composite catalyst was confirmed to be efficient for the highly selective production of isobutane, which is regarded as a synthetic intermediate of MTBE (methyl tert-butyl ether). The composite catalyst of Fe-Zn-Zr catalyst with H-ZMS-5 formed C 5+ hydrocarbons in good yield. The ratios of branched hydrocarbons in C 5+ ones, which are suitable for high-octane gasoline, were over 90%.

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Section: Resultsmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Syntheses of Isobutane and Branched Higher Hydrocarbons from Carbon Dioxide and Hydrogen over Composite Catalysts

Tan

Fujiwara

Ando

et al. 1999

Ind. Eng. Chem. Res.

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“…The hydrogenation of carbon dioxide essentially produces C 1 compounds, such as methane and methanol, although C 2+ hydrocarbons may be obtained either by direct or indirect routes, that is, through syngas [49,146] and/or methanol intermediate formation, respectively. [147] The direct reaction makes use of CO 2 -based FT reactions by using a CO 2 /H 2 feed in a two-step mechanism, including a rWGS and a FTS reaction.…”

Section: Iron-based Multifunctional Catalysts For Co 2 Hydrogenationmentioning

confidence: 99%

Exploring Iron‐based Multifunctional Catalysts for Fischer–Tropsch Synthesis: A Review

2011

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The continuous increase in oil prices together with an increase in carbon dioxide concentration in the atmosphere has prompted an increased interest in the production of liquid fuels from non-petroleum sources to ensure the continuation of our worldwide demands while maximizing CO(2) utilization. In this sense, the Fischer-Tropsch (FT) technology provides a feasible option to render high value-added hydrocarbons. Alternative sources, such as biomass or coal, offer a real possibility to realize these purposes by making use of H(2)-deficient or CO(2)-rich syngas feeds. The management of such feeds ideally relies on the use of iron catalysts, which exhibit the unique ability to adjust the H(2)/CO molar ratio to an optimum value for hydrocarbon synthesis through the water-gas-shift reaction. Taking advantage of the emerging attention to hybrid FT-synthesis catalysts based on cobalt and their associated benefits, an overview of the current state of literature in the field of iron-based multifunctional catalysts is presented. Of particular interest is the use of zeolites in combination with a FT catalyst in a one-stage operation, herein named multifunctional, which offer key opportunities in the modification of desired product distributions and selectivity, to eventually overcome the quality limitations of the fuels prepared under intrinsic FT conditions. This review focuses on promising research activities addressing the conversion of syngas to liquid fuels mediated by iron-based multifunctional materials, highlights their preparation and properties, and discusses their implication and challenges in the area of carbon utilization through H(2)/CO(+CO(2)) mixtures.

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Carbon Dioxide Reduction to C1 or Cn Molecules

Aresta

2003

Carbon Dioxide Recovery and Utilization

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Hydrogenation of carbon dioxide over copper-pyrochlore/zeolite composite catalysts

Cited by 7 publications

References 9 publications

Syntheses of Isobutane and Branched Higher Hydrocarbons from Carbon Dioxide and Hydrogen over Composite Catalysts

Syntheses of Isobutane and Branched Higher Hydrocarbons from Carbon Dioxide and Hydrogen over Composite Catalysts

Exploring Iron‐based Multifunctional Catalysts for Fischer–Tropsch Synthesis: A Review

Carbon Dioxide Reduction to C1 or Cn Molecules

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