Mixed Oxides Confined and Tailored Cobalt Nanocatalyst for Direct Ethanol Synthesis from Syngas: A Catalyst Designing by Using Perovskite-Type Oxide as the Precursor

Guo, Shaoxia; Li, Shuangshuang; Zhong, Huixian; Gong, Dandan; Wang, Jiaming; Kang, Noeul; Zhang, Lihong; Liu, Guilong; Liu, Yuan

doi:10.1021/acs.iecr.7b04336

Cited by 14 publications

(4 citation statements)

References 54 publications

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“…Co-based bimetallic catalysts have gained increasing attention because of their relatively high HA selectivity and low cost and the wide availability of the precursors. A wide selection of second metals for Co bimetallic catalysts have been reported, including Ga, − La, − Ca, Ce, and Mn, − because of their strong interaction with Co, which influences the electronic properties of the active sites.…”

Section: Bimetallic Catalystsmentioning

confidence: 99%

Active Centers of Catalysts for Higher Alcohol Synthesis from Syngas: A Review

et al. 2018

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The gradual depletion of oil resources and the necessity to reduce greenhouse gas emissions portray a concerning image of our contemporary security of liquid transportation fuels in the event of a global crisis. Despite a vast amount of natural gas resources that we have and the huge economic incentive, the conversion of gas to liquid fuels or chemicals is still very limited because of the high technological complexity and capital cost for facilities. However, with the anticipated depletion of liquid petroleum and the soaring price of crude oil, the conversion of natural gas to liquid feedstock or fuels will become more and more important. Higher alcohols are important feedstocks for the chemical and pharmaceutical industries and have wide applications as potential fuel additives or hydrogen carriers for fuel cells for clean energy delivery. There is a long-standing interest in the synthesis of higher alcohols from syngas, an important Fischer–Tropsch technology for natural gas conversion. The purpose of this review is to provide readers with an extensive account of catalytic synthesis of higher alcohols from syngas using various catalysts reviewed from a unique perspective: clarification of the active centers and reaction pathways. In light of the different sources providing the active centers, three major classes of catalysts in terms of monometallic, bimetallic, and trimetallic/multimetallic catalysts are systematically reviewed, and their respective performances are carefully compared. Finally, future works proposed to improve the catalyst design are described.

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Section: Bimetallic Catalystsmentioning

confidence: 99%

Active Centers of Catalysts for Higher Alcohol Synthesis from Syngas: A Review

et al. 2018

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“…However, the unsatisfied catalytic performance of the catalyst for DES restricted its industrial process. [ 1–4 ]…”

Section: Introductionmentioning

confidence: 99%

Highly Dispersed Ni–Fe Alloy Catalysts on MgAl₂O₄ Derived from Hydrotalcite for Direct Ethanol Synthesis from Syngas

Liu

Wang

et al. 2020

Energy Tech

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In view of the dual active sites mechanism of direct ethanol synthesis and the excellent catalytic performance of bimetallic catalysts, a series of Ni–Fe alloy catalysts with different Ni/Fe molar ratios derived from layered double hydroxides (LDHs) precursors are synthesized. During the calcination and reduction process of LDHs precursors, the Ni–Fe alloy is obtained, and attributed to all the elements being evenly dispersed at the atomic level in the LDHs precursors; meanwhile, a strong interaction between Ni–Fe alloy and MgAl2O4 support exists. As a result, Ni–Fe alloy nanoparticles are highly dispersed on the MgAl2O4 surface. The high CO adsorption ability on the Ni–Fe alloy and synergism catalysis between Ni and Fe result in excellent catalytic activity and high selectivity to ethanol on the bimetallic Ni–Fe alloy. In addition, the strong antisintering ability and stable alloy structure bring about a good catalytic stability. This research proposes a new catalytic system for direct ethanol synthesis from syngas.

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“…The H 2 -TPR thermograms of the 8Cu/(Mn–Al), 8Co/(Mn–Al), and different Cu–Co/(Mn–Al) precursors are displayed in Figure . The peaks located at 250–350 °C can be assigned to the H 2 consumptions of CuO to Cu and Co 2 O 3 to CoO. , The peaks at 450–750 °C are assigned to the remaining CoO to Co . It is obvious that the H 2 consumption peaks of Co 3+ and Co 2+ shifted to lower temperatures for Cu–Co/(Mn–Al) catalysts with increasing Cu content.…”

Section: Resultsmentioning

confidence: 93%

“…The peaks located at 250−350 °C can be assigned to the H 2 consumptions of CuO to Cu and Co 2 O 3 to CoO. 39,40 The peaks at 450−750 °C are assigned to the remaining CoO to Co. 41 It is obvious that the H 2 consumption peaks of Co 3+ and Co 2+ shifted to lower temperatures for Cu−Co/(Mn−Al) catalysts with increasing Cu content. The reduction of Co oxide was most probably promoted by Cu species and shifted to a lower temperature range that overlapped with the Cu 2+ reduction temperature range.…”

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

Preparation, Structural Characteristics, and Catalytic Performance of Cu–Co Alloy Supported on Mn–Al Oxide for Higher Alcohol Synthesis via Syngas

Zhao

Duan

Zhang

et al. 2018

Ind. Eng. Chem. Res.

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A series of Mn−Al oxide supported Cu−Co alloy catalysts having various molar ratios of Cu/Co were prepared using the facile sol−gel synthesis, with the aim of investigating the effects of the chemical, physical properties in the catalytic behavior on higher alcohol synthesis (HAS). The as-prepared samples were characterized through utilizing XRD, BET, TEM, XPS, H 2 -TPD/TPR, CO-TPD, in-situ CO adsorption DRIFTS, and CO-TPSR techniques. The study suggests that the proper ratio of Cu/Co could adjust the amount of adsorbed hydrogen and nondissociatively adsorbed CO at the surface of catalyst on CO hydrogenation and insertion, improve the reducibility, and ameliorate the catalytic behavior for HAS. Especially, the 3Cu−5Co/(Mn−Al) catalyst showed the best catalytic behavior with a CO conversion of 33.4%, total alcohol selectivity of 39.7%, C 2+ alcohol selectivity in the total alcohols of 57.3% at GHSV of 5000 h −1 , 260 °C, and 5 MPa.

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Mixed Oxides Confined and Tailored Cobalt Nanocatalyst for Direct Ethanol Synthesis from Syngas: A Catalyst Designing by Using Perovskite-Type Oxide as the Precursor

Cited by 14 publications

References 54 publications

Active Centers of Catalysts for Higher Alcohol Synthesis from Syngas: A Review

Active Centers of Catalysts for Higher Alcohol Synthesis from Syngas: A Review

Highly Dispersed Ni–Fe Alloy Catalysts on MgAl₂O₄ Derived from Hydrotalcite for Direct Ethanol Synthesis from Syngas

Preparation, Structural Characteristics, and Catalytic Performance of Cu–Co Alloy Supported on Mn–Al Oxide for Higher Alcohol Synthesis via Syngas

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Mixed Oxides Confined and Tailored Cobalt Nanocatalyst for Direct Ethanol Synthesis from Syngas: A Catalyst Designing by Using Perovskite-Type Oxide as the Precursor

Cited by 14 publications

References 54 publications

Active Centers of Catalysts for Higher Alcohol Synthesis from Syngas: A Review

Active Centers of Catalysts for Higher Alcohol Synthesis from Syngas: A Review

Highly Dispersed Ni–Fe Alloy Catalysts on MgAl2O4 Derived from Hydrotalcite for Direct Ethanol Synthesis from Syngas

Preparation, Structural Characteristics, and Catalytic Performance of Cu–Co Alloy Supported on Mn–Al Oxide for Higher Alcohol Synthesis via Syngas

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Highly Dispersed Ni–Fe Alloy Catalysts on MgAl₂O₄ Derived from Hydrotalcite for Direct Ethanol Synthesis from Syngas