Direct Synthesis of Dimethyl Ether from CO2: Recent Advances in Bifunctional/Hybrid Catalytic Systems

Mota, N.; Ordóñez, Elena Millán; Pawelec, B.; Fierro, J.L.G.; Navarro, R.M.

doi:10.3390/catal11040411

Cited by 61 publications

(71 citation statements)

References 152 publications

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“…(2) Associative mechanism: multi-site adsorption of reagents, chain initiation, chain growth and termination and desorption of the final product (Equation ( 3)). In this mechanism, the association of hydrogen with CO 2 leads to the formation of different intermediate surface species, such as formate, carbonate or carboxylic species, which decompose into final products [26].…”

Section: Modified Fischer-tropsch To Olefins (Fto)mentioning

confidence: 99%

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Catalysts for the Conversion of CO2 to Low Molecular Weight Olefins—A Review

et al. 2021

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There is a large worldwide demand for light olefins (C2=–C4=), which are needed for the production of high value-added chemicals and plastics. Light olefins can be produced by petroleum processing, direct/indirect conversion of synthesis gas (CO + H2) and hydrogenation of CO2. Among these methods, catalytic hydrogenation of CO2 is the most recently studied because it could contribute to alleviating CO2 emissions into the atmosphere. However, due to thermodynamic reasons, the design of catalysts for the selective production of light olefins from CO2 presents different challenges. In this regard, the recent progress in the synthesis of nanomaterials with well-controlled morphologies and active phase dispersion has opened new perspectives for the production of light olefins. In this review, recent advances in catalyst design are presented, with emphasis on catalysts operating through the modified Fischer–Tropsch pathway. The advantages and disadvantages of olefin production from CO2 via CO or methanol-mediated reaction routes were analyzed, as well as the prospects for the design of a single catalyst for direct olefin production. Conclusions were drawn on the prospect of a new catalyst design for the production of light olefins from CO2.

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Section: Modified Fischer-tropsch To Olefins (Fto)mentioning

confidence: 99%

“…We dedicate this work to the recently deceased Professor José Luis García Fierro, whose research group investigated the catalytic aspects of the Fischer-Tropsch synthesis process for more than two decades [1,9,[19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Catalysts for the Conversion of CO2 to Low Molecular Weight Olefins—A Review

et al. 2021

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“…Developing and using a suitable catalyst in the gas supply stage can be one way to minimize the concentration of these gases. Another solution could be to design and develop a bifunctional catalyst [58] that could control higher concentrations of these toxic gases. Therefore finding the right formulation for a bifunctional catalyst is also important for better process performance.…”

Section: Catalysts For Dme Productionmentioning

confidence: 99%

Direct catalytic production of dimethyl ether from CO and CO2: A review

Akhoondi

Osman

Eslami³

2021

Synth. Sinter.

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Dimethyl ether (DME) is a synthetically produced alternative fuel to diesel-based fuel and could be used in ignition diesel engines due to increasing energy demand. DME is considered extremely clean transportation and green fuel because it has a high cetane number (around 60), low boiling point (−25 °C), and high oxygen amount (35 wt%) which allow fast evaporation and higher combustion quality (smoke-free operation and 90% fewer NOx emissions) than other alternative CO2-based fuels. DME can be synthesized from various routes such as coal, petroleum, and bio-based material (i.e., biomass and bio-oil). Dimethyl ether can be produced from CO2 to prevent greenhouse gas emissions. This review aims to summarize recent progress in the field of innovative catalysts for the direct synthesis of dimethyl ether from syngas (CO+H2) and operating conditions. The problems of this process have been raised based on the yield and selectivity of dimethyl ether. However, regardless of how syngas is produced, the estimated total capital and operating costs in the industrial process depend on the type of reactor and the separation method.

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“…On the other hand, methanol dehydration reaction takes place rapidly over a solid acid component. Thus, due to the high activity and easy preparation of the Cu-ZnO-based systems, bifunctional catalysts for directly converting CO 2 into DME can be obtained by combining such redox systems with solid acid catalysts [14], among which H-ZSM-5 [8,[15][16][17][18][19][20][21][22], ferrierite [17,19,20,23,24], mordenite [17,19,20], and γ-Al 2 O 3 [25,26].…”

Section: Introductionmentioning

confidence: 99%

Ex-LDH-Based Catalysts for CO2 Conversion to Methanol and Dimethyl Ether

Mureddu¹,

Lai²,

Atzori

et al. 2021

Catalysts

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CO2-derived methanol and dimethyl ether can play a very important role as fuels, energy carriers, and bulk chemicals. Methanol production from CO2 and renewable hydrogen is considered to be one of the most promising pathways to alleviate global warming. In turn, methanol could be subsequently dehydrated into DME; alternatively, one-step CO2 conversion to DME can be obtained by hydrogenation on bifunctional catalysts. In this light, four oxide catalysts with the same Cu and Zn content (Cu/Zn molar ratio = 2) were synthesized by calcining the corresponding CuZnAl LDH systems modified with Zr and/or Ce. The fresh ex-LDH catalysts were characterized in terms of composition, texture, structure, surface acidity and basicity, and reducibility. Structural and acid–base properties were also studied on H2-treated samples, on which specific metal surface area and dispersion of metallic Cu were determined as well. After in situ H2 treatment, the ex-LDH systems were tested as catalysts for the hydrogenation of CO2 to methanol at 250 °C and 3.0 MPa. In the same experimental conditions, CO2 conversion into dimethyl ether was studied on bifunctional catalysts obtained by physically mixing the exLDH hydrogenation catalysts with acid ferrierite or ZSM-5 zeolites. For both processes, the effect of the Al/Zr/Ce ratio on the products distribution was investigated.

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Direct Synthesis of Dimethyl Ether from CO2: Recent Advances in Bifunctional/Hybrid Catalytic Systems

Cited by 61 publications

References 152 publications

Catalysts for the Conversion of CO2 to Low Molecular Weight Olefins—A Review

Catalysts for the Conversion of CO2 to Low Molecular Weight Olefins—A Review

Direct catalytic production of dimethyl ether from CO and CO2: A review

Ex-LDH-Based Catalysts for CO2 Conversion to Methanol and Dimethyl Ether

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