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Recent progress for direct synthesis of dimethyl ether from syngas on the heterogeneous bifunctional hybrid catalysts

[Display omitted] •Dimethyl ether (DME) is a multi-purpose alternative synthetic fuel for diesel and liquefied petroleum gas.•Recent direct DME synthesis from syngas was overviewed over hybridized bifunctional catalysts.•Surface acidity and metallic sites for CO or CO2 hydrogenation to DME are cruci...

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Bibliographic Details
Published in:Applied catalysis. B, Environmental Environmental, 2017-11, Vol.217, p.494-522
Main Authors: Saravanan, K., Ham, Hyungwon, Tsubaki, Noritatsu, Bae, Jong Wook
Format: Article
Language:English
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Summary:[Display omitted] •Dimethyl ether (DME) is a multi-purpose alternative synthetic fuel for diesel and liquefied petroleum gas.•Recent direct DME synthesis from syngas was overviewed over hybridized bifunctional catalysts.•Surface acidity and metallic sites for CO or CO2 hydrogenation to DME are crucial factors. The recent rising demand of renewable energies and climate changes has been driving intensive academic researches into new chemical routes to sustainable and clean fuel productions in order to meet the demands of industrial evolution by solving energy crisis due to limited fossil fuel reservoirs and increasing environmental pollutants. Dimethyl ether (DME) is a multi-purpose synthetic fuel and chemical that can be used as an excellent alternative to diesel fuel and liquefied petroleum gas (LPG). The present review paper briefly provides an overview of the recent developments for a direct synthesis of DME from synthesis gas (syngas, CO+H2) over some hybridized bifunctional heterogeneous catalysts composed of copper-based hydrogenation catalysts with solid acid components such as alumina or zeolites mainly, where the catalytic activities significantly depend on its properties influenced by synthesis protocols, porosities, surface areas, interactions of active metals with supports, distributions of metal particles on the supports and so on. We have also briefly covered the hydrogenation of CO2, a model reaction for the utilization of CO2 containing in syngas, to produce DME and thereby significantly mitigate its environmental impacts. Furthermore, the catalytic performances of the direct synthesis of DME by hydrogenation of carbon oxides were explained in terms of the acid sites of the solid acid catalysts and surface area of metallic copper nanoparticles in the hybridized bifunctional catalysts with their preparation protocols.
ISSN:0926-3373
1873-3883
DOI:10.1016/j.apcatb.2017.05.085