One-step synthesis of dimethyl ether from syngas on ordered mesoporous copper incorporated alumina

Wang, Qianqian; Chen, Yuexian; Yu, Feng; Pan, Dahai; Fan, Bin; Ma, Jinghong; Li, Ruifeng

doi:10.1016/j.jechem.2016.04.014

Cited by 12 publications

(4 citation statements)

References 24 publications

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“…Apart from the aforementioned hybrid catalysts, the supported bifunctional catalysts were also frequently used in the STD reactions . The supported catalyst can be produced by the coprecipitation, impregnation, sol‐gel, and wet‐chemical ways .…”

Section: Figurementioning

confidence: 99%

“…Apart from the aforementioned hybrid catalysts, the supported bifunctional catalysts were also frequently used in the STD reactions. [2,[51][52][53][54][55][56][57][58][59][60] The supported catalyst can be produced by the coprecipitation, impregnation, sol-gel, and wet-chemical ways. [61][62][63][64][65][66][67][68][69][70] The character and performance of the supported catalysts in the STD reaction strongly depend on their synthesis method.…”

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confidence: 99%

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Ethanol as a Binder to Fabricate a Highly‐Efficient Capsule‐Structured CuO−ZnO−Al₂O₃@HZSM‐5 Catalyst for Direct Production of Dimethyl Ether from Syngas

Guo

Zhao

2020

ChemCatChem

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This work reports a highly efficient capsule‐structured CuO−ZnO−Al2O3@HZSM‐5 (CZA@HZSM‐5‐EtOH) core‐shell catalyst for the direct conversion of syngas to dimethyl ether by a facile physical coating method with ethanol as a binder through coating micrometer‐sized HZSM‐5 shell on the prior‐shaped millimeter‐sized CZA core, it shows 2.9 times higher CO conversion with the 2.7 times higher turnover frequency and 9.2 times higher dimethyl ether space‐time yield of the CZA@HZSM‐5‐SS catalyst prepared by a similar process but with silica sol as a binder (315.5 vs 34.3 gDME kgcat−1 h−1). The relationship between the structure and performance was explored by a variety of characterization techniques including X‐ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X‐ray diffraction (XRD), ammonia temperature programmed desorption (NH3‐TPD), nitrogen adsorption‐desorption, H2‐temperature‐programmed reduction (H2‐TPR) and H2‐TPR after oxidation of the samples by N2O. CZA@HZSM‐5‐EtOH can be considered as a highly efficient and practical catalyst for dimethyl ether synthesis from syngas. This work presents a new avenue to design other bifunctional catalysts for the cascade reactions in which the raw materials can be converted into an intermediate over the core and then the as‐formed intermediate over the core can be subsequently converted into the final product.

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Section: Figurementioning

confidence: 99%

mentioning

confidence: 99%

Ethanol as a Binder to Fabricate a Highly‐Efficient Capsule‐Structured CuO−ZnO−Al₂O₃@HZSM‐5 Catalyst for Direct Production of Dimethyl Ether from Syngas

Guo

Zhao

2020

ChemCatChem

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“…These catalysts are usually synthesized by either coprecipitation or impregnation, dispersing the redox phase onto the surface of a support, which consists of the dehydrating acidic catalyst, such as zeolites [4,5] or disordered mesoporous aluminosilicates [28]. A few cases of bifunctional catalysts consisting in a redox phase dispersed inside mesostructured γ-Al 2 O 3 [29][30][31][32] or mesostructured silica [33] have also been reported.…”

Section: Introductionmentioning

confidence: 99%

Mesostructured γ-Al2O3-Based Bifunctional Catalysts for Direct Synthesis of Dimethyl Ether from CO2

et al. 2023

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In this work, we propose two bifunctional nanocomposite catalysts based on acidic mesostructured γ-Al2O3 and a Cu/ZnO/ZrO2 redox phase. γ-Al2O3 was synthesized by an Evaporation-Induced Self-Assembly (EISA) method using two different templating agents (block copolymers Pluronic P123 and F127) and subsequently functionalized with the redox phase using an impregnation method modified with a self-combustion reaction. These nanocomposite catalysts and their corresponding mesostructured supports were characterized in terms of structural, textural, and morphological features as well as their acidic properties. The bifunctional catalysts were tested for the CO2-to-DME process, and their performances were compared with a physical mixture consisting of the most promising support as a dehydration catalyst together with the most common Cu-based commercial redox catalyst (CZA). The results highlight that the most appropriate Pluronic for the synthesis of γ-Al2O3 is P123; the use of this templating agent allows us to obtain a mesostructure with a smaller pore size and a higher number of acid sites. Furthermore, the corresponding composite catalyst shows a better dispersion of the redox phase and, consequently, a higher CO2 conversion. However, the incorporation of the redox phase into the porous structure of the acidic support (chemical mixing), favoring an intimate contact between the two phases, has detrimental effects on the dehydration performances due to the coverage of the acid sites with the redox nanophase. On the other hand, the strategy involving the physical mixing of the two phases, distinctly preserving the two catalytic functions, assures better performances.

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“…It can be regarded as an alternative technology to Fischer-Tropsch transformation of syngas produced from biomass as a renewable resource. The DME is produced in two steps with CO hydrogenation to methanol over a copper-based catalyst and subsequent dehydration to DME over acid catalysts [17], yet the methanol yield is low due to the thermodynamic limitation, which makes the product expensive [18]. In the direct DME synthesis from syngas the thermodynamic equilibrium is shifted to the target product [19,20].…”

Section: Introductionmentioning

confidence: 99%

Embryonic zeolites for highly efficient synthesis of dimethyl ether from syngas

Palčić

Navarro-Jaén²,

Wu³

et al. 2021

Microporous and Mesoporous Materials

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One-step synthesis of dimethyl ether from syngas on ordered mesoporous copper incorporated alumina

Cited by 12 publications

References 24 publications

Ethanol as a Binder to Fabricate a Highly‐Efficient Capsule‐Structured CuO−ZnO−Al₂O₃@HZSM‐5 Catalyst for Direct Production of Dimethyl Ether from Syngas

Ethanol as a Binder to Fabricate a Highly‐Efficient Capsule‐Structured CuO−ZnO−Al₂O₃@HZSM‐5 Catalyst for Direct Production of Dimethyl Ether from Syngas

Mesostructured γ-Al2O3-Based Bifunctional Catalysts for Direct Synthesis of Dimethyl Ether from CO2

Embryonic zeolites for highly efficient synthesis of dimethyl ether from syngas

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One-step synthesis of dimethyl ether from syngas on ordered mesoporous copper incorporated alumina

Cited by 12 publications

References 24 publications

Ethanol as a Binder to Fabricate a Highly‐Efficient Capsule‐Structured CuO−ZnO−Al2O3@HZSM‐5 Catalyst for Direct Production of Dimethyl Ether from Syngas

Ethanol as a Binder to Fabricate a Highly‐Efficient Capsule‐Structured CuO−ZnO−Al2O3@HZSM‐5 Catalyst for Direct Production of Dimethyl Ether from Syngas

Mesostructured γ-Al2O3-Based Bifunctional Catalysts for Direct Synthesis of Dimethyl Ether from CO2

Embryonic zeolites for highly efficient synthesis of dimethyl ether from syngas

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Ethanol as a Binder to Fabricate a Highly‐Efficient Capsule‐Structured CuO−ZnO−Al₂O₃@HZSM‐5 Catalyst for Direct Production of Dimethyl Ether from Syngas

Ethanol as a Binder to Fabricate a Highly‐Efficient Capsule‐Structured CuO−ZnO−Al₂O₃@HZSM‐5 Catalyst for Direct Production of Dimethyl Ether from Syngas