Influence of different microstructures of cobalt on the catalytic activity for amination of ethylene glycol: comparison of HCP cobalt and FCC cobalt

Xie, Zhiyong; An, Hualiang; Zhao, Xinqiang; Wang, Yanji

doi:10.1039/d2cy00156j

Cited by 8 publications

(12 citation statements)

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“…Xie et al [9,32] . prepared unsupported monometallic catalysts for catalyzing amination of ethylene glycol; a 33.9 % ethylene glycol conversion, a 28.2 % ethanolamine selectivity and a 15.3 % ethylenediamine selectivity were obtained.…”

Section: Resultsmentioning

confidence: 99%

“…Xie et al [9,32] prepared unsupported monometallic catalysts for catalyzing amination of ethylene glycol; a 33.9 % ethylene glycol conversion, a 28.2 % ethanolamine selectivity and a 15.3 % ethylenediamine selectivity were obtained. In the research of Lei et al, [10] the catalytic activity of CoÀ Ag/γ-Al 2 O 3 was improved by doping a moderate amount of Ag.…”

Section: Effect Of Ammonia/alcohol Molar Ratiomentioning

confidence: 99%

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Amination of Ethylene Glycol to Ethylenediamine Catalyzed by Co‐Cu/γ‐Al₂O₃

Zheng

et al. 2022

ChemistrySelect

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Ethylenediamine is an important organic chemical and commercially produced from non-renewable starting material. In the present work, amination of ethylene glycol to ethylenediamine was studied using an aqueous ammonia as ammonia source. A series of supported bimetallic catalysts were prepared by impregnation method and characterized by means of H 2 -TPR, H 2 -TPD, XRD, XPS and N 2 adsorption-desorption. Their catalytic performance for amination of ethylene glycol was investigated and CoÀ Cu/γ-Al 2 O 3 catalyst exhibited high activity and good selectivity to ethylenediamine. There exists obvious interaction and synergistic effect between Cu and Co in CoÀ Cu/γ-Al 2 O 3 for lowering catalyst reduction temperature and improving catalytic performance separately. The selectivity of ethylenediamine and ethanolamine respectively attained 45.7 % and 23.7 % at an ethylene glycol conversion of 41.5 % under the suitable reaction conditions. On this basis, a majority of by-products in the amination of ethylene glycol were identified by gas chromatography-mass spectrometry analysis and a reaction network was proposed.

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of Ammonia/alcohol Molar Ratiomentioning

confidence: 99%

Amination of Ethylene Glycol to Ethylenediamine Catalyzed by Co‐Cu/γ‐Al₂O₃

Zheng

et al. 2022

ChemistrySelect

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“…In essence, the reductive amination of EG takes place via the so-called borrowing hydrogen methodology , or hydrogen-transfer methodology . On the basis of a few mechanistic studies, the key reaction steps and typical side reactions during the metal-catalyzed amination of EG are illustrated in Scheme . The main reaction steps include (i) the dehydrogenation of the −CH 2 OH group to a carbonyl group, (ii) the condensation of the carbonyl group with NH 3 to form an imine, and (iii) hydrogenation of the imine to produce amine.…”

Section: Direct Synthesis Of Eda From Egmentioning

confidence: 99%

Green Catalytic Synthesis of Ethylenediamine from Ethylene Glycol and Monoethanolamine: A Review

Wu,

2024

ACS Omega

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Ethylenediamine (EDA) is a crucial chemical raw material and fine chemical intermediate. Compared with the industrial approach of ammonolysis of 1,2-dichloroethane, the catalytic amination of ethylene glycol (EG) is an economical and environmentally benign route that will be the future trend for EDA synthesis. Herein, we systemically review the recent progress in direct and indirect catalytic conversion of EG to EDA. Furthermore, different types of catalysts are discussed: (i) supported metal and multimetallic catalysts, (ii) solid acid catalysts, and (iii) other active catalysts (e.g., ionic liquids and metal complexes). Finally, we conclude with the frontiers and future prospects of the catalytic synthesis of EDA from EG and monoethanolamine, providing readers a snapshot of this field.

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“…In addition to the FTS reaction, the crystal phases of Co have a great influence on the selectivity of ethylene glycol amination. 154 It was found that the fcc Co (111) surface is more conducive to the breaking of O−H and C−H bonds, which improves the conversion of ethylene glycol and the yield of primary amine. However, the C−C bond is more easily broken on hcp Co, and the selectivity of ethylene glycol amination toward primary amines is lower than that of fcc Co. 154 Consequently, it is imperative to conduct further reactions to thoroughly assess the impact of cobalt crystal phases, with the aim of improving the performance of cobalt catalysts.…”

Section: Comentioning

confidence: 99%

“…In addition to the FTS reaction, the crystal phases of Co have a great influence on the selectivity of ethylene glycol amination . It was found that the fcc Co (111) surface is more conducive to the breaking of O–H and C–H bonds, which improves the conversion of ethylene glycol and the yield of primary amine.…”

Section: Transition Metals In Phase Engineering In Heterogeneous Cata...mentioning

confidence: 99%

Crystal-Phase Engineering in Heterogeneous Catalysis

Zhao,

Wang,

Feng

et al. 2023

Chem. Rev.

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The performance of a chemical reaction is critically dependent on the electronic and/or geometric structures of a material in heterogeneous catalysis. Over the past century, the Sabatier principle has already provided a conceptual framework for optimal catalyst design by adjusting the electronic structure of the catalytic material via a change in composition. Beyond composition, it is essential to recognize that the geometric atomic structures of a catalyst, encompassing terraces, edges, steps, kinks, and corners, have a substantial impact on the activity and selectivity of a chemical reaction. Crystal-phase engineering has the capacity to bring about substantial alterations in the electronic and geometric configurations of a catalyst, enabling control over coordination numbers, morphological features, and the arrangement of surface atoms. Modulating the crystallographic phase is therefore an important strategy for improving the stability, activity, and selectivity of catalytic materials. Nonetheless, a complete understanding of how the performance depends on the crystal phase of a catalyst remains elusive, primarily due to the absence of a molecular-level view of active sites across various crystal phases. In this review, we primarily focus on assessing the dependence of catalytic performance on crystal phases to elucidate the challenges and complexities inherent in heterogeneous catalysis, ultimately aiming for improved catalyst design.

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Influence of different microstructures of cobalt on the catalytic activity for amination of ethylene glycol: comparison of HCP cobalt and FCC cobalt

Abstract: Non-noble metal Co is an ideal catalyst for ethylene glycol amination due to its excellent dehydrogenation and hydrogenation activity. However, the influence of microstructures of Co on the catalytic activity...

Cited by 8 publications

References 57 publications

Amination of Ethylene Glycol to Ethylenediamine Catalyzed by Co‐Cu/γ‐Al₂O₃

Amination of Ethylene Glycol to Ethylenediamine Catalyzed by Co‐Cu/γ‐Al₂O₃

Green Catalytic Synthesis of Ethylenediamine from Ethylene Glycol and Monoethanolamine: A Review

Crystal-Phase Engineering in Heterogeneous Catalysis

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Influence of different microstructures of cobalt on the catalytic activity for amination of ethylene glycol: comparison of HCP cobalt and FCC cobalt

Abstract: Non-noble metal Co is an ideal catalyst for ethylene glycol amination due to its excellent dehydrogenation and hydrogenation activity. However, the influence of microstructures of Co on the catalytic activity...

Cited by 8 publications

References 57 publications

Amination of Ethylene Glycol to Ethylenediamine Catalyzed by Co‐Cu/γ‐Al2O3

Amination of Ethylene Glycol to Ethylenediamine Catalyzed by Co‐Cu/γ‐Al2O3

Green Catalytic Synthesis of Ethylenediamine from Ethylene Glycol and Monoethanolamine: A Review

Crystal-Phase Engineering in Heterogeneous Catalysis

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Product

Resources

About

Amination of Ethylene Glycol to Ethylenediamine Catalyzed by Co‐Cu/γ‐Al₂O₃

Amination of Ethylene Glycol to Ethylenediamine Catalyzed by Co‐Cu/γ‐Al₂O₃