Activated carbon aerogel supported copper catalysts for the hydrogenation of methyl acetate to ethanol: effect of KOH activation

Hou, Xiaoxiong; Zhao, Jinxian; Liu, Junjie; Han, Yahong; Pei, Yongli; Ren, Jun

doi:10.1039/c9nj01434a

Cited by 19 publications

(8 citation statements)

References 55 publications

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“…11), due to the fact that Cu-based catalysts are active for the hydrogenation of the C=O bond while much less active for the cleavage of the C−C bond. 398,410 Although a Nibased catalyst was also developed, 411 the desired product yield was not high, compared with Cu-based catalysts (Table 11, entry 18). Similar with the situation in oxalate hydrogenation, the valence state of Cu species is one of the most important factors influencing the catalytic performances.…”

Section: Reaction Networkmentioning

confidence: 99%

“…hydrogenation of CO to ethanol, has disadvantages like low CO conversion and low ethanol selectivity, restricting its industrial application. 398 Hence, the indirect route becomes attractive because of its potentially higher yield of ethanol. Here we take methyl acetate as an example to illustrate the reaction network, as described in Scheme 13.…”

Section: Reaction Networkmentioning

confidence: 99%

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Hydrogenation of Carboxylic Acids, Esters, and Related Compounds over Heterogeneous Catalysts: A Step toward Sustainable and Carbon-Neutral Processes

Junge

Beller

2023

Chem. Rev.

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The catalytic hydrogenation of esters and carboxylic acids represents a fundamental and important class of organic transformations, which is widely applied in energy, environmental, agricultural, and pharmaceutical industries. Due to the low reactivity of the carbonyl group in carboxylic acids and esters, this type of reaction is, however, rather challenging. Hence, specifically active catalysts are required to achieve a satisfactory yield. Nevertheless, in recent years, remarkable progress has been made on the development of catalysts for this type of reaction, especially heterogeneous catalysts, which are generally dominating in industry. Here in this review, we discuss the recent breakthroughs as well as milestone achievements for the hydrogenation of industrially important carboxylic acids and esters utilizing heterogeneous catalysts. In addition, related catalytic hydrogenations that are considered of importance for the development of cleaner energy technologies and a circular chemical industry will be discussed in detail. Special attention is paid to the insights into the structure–activity relationship, which will help the readers to develop rational design strategies for the synthesis of more efficient heterogeneous catalysts.

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Section: Reaction Networkmentioning

confidence: 99%

Section: Reaction Networkmentioning

confidence: 99%

Hydrogenation of Carboxylic Acids, Esters, and Related Compounds over Heterogeneous Catalysts: A Step toward Sustainable and Carbon-Neutral Processes

Junge

Beller

2023

Chem. Rev.

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“…Luckily, aerogel‐based graphitics such as graphene or CNTs can be skipped as they are graphitized. Physically or chemically, carbon aerogels with potassium hydroxide (KOH), sodium hydroxide (NaOH), carbon dioxide (CO 2 ), and water (H 2 O) have been activated to produce extra micropores and increase the surface area 51,52 . Furthermore, several parameters, such as surface area, pores, and product pore size distribution, will be controlled by the activation of carbon aerogel 53 …”

Section: Production Methodsmentioning

confidence: 99%

“…Physically or chemically, carbon aerogels with potassium hydroxide (KOH), sodium hydroxide (NaOH), carbon dioxide (CO 2 ), and water (H 2 O) have been activated to produce extra micropores and increase the surface area. 51,52 Furthermore, several parameters, such as surface area, pores, and product pore size distribution, will be controlled by the activation of carbon aerogel. 53 F I G U R E 3 Different procedures to prepare aerogel and aerogel composite-based catalysts 47…”

Section: Carbonizationmentioning

confidence: 99%

Organic aerogel as electro‐catalytic support in low‐temperature fuel cell

Osman

Kamarudin

Basri

et al. 2022

Intl J of Energy Research

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Fuel cells have been developed efficiently in recent years as a secure and highenergy conversion technology. The innovation in electrocatalysis focuses on initiatives to minimize or replace Pt electrodes used. As an alternative, organic aerogel materials are normally used as electrodes in low temperature fuel cells due to their high electronic conducting and electrocatalytic characteristics. These are usually characterized by fundamental functional elements of strong covalent C-C bonds from organic precursors. This review will mainly focus on organic aerogel nanomaterials related to carbon aerogels, carbon nanotube aerogels, and graphene aerogels as electrocatalytic supports by surface modification or structural features in catalysis. In contrast, organic aerogel materials prove to be durable, economical, and active electrocatalysts that can provide outstanding electrocatalytic efficiency in low temperature fuel cell applications. Last, this paper recaps the challenges faced in current fuel cell applications and the use of organic aerogel materials to address these challenges.

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“…On the other hand, subsequent studies considered both Cu + and Cu 0 as active sites in the catalytic hydrogenation of carbon–oxygen bonds. It is widely believed that the synergistic effect of Cu 0 and Cu + could improve the catalytic hydrogenation activity, suggesting Cu 0 activates H 2 and Cu + activates the methoxy (CH 3 O−) and acyl (CH 3 CO−) group. ,,− Some studies reported the synergistic effect of Cu 0 and Cu + on the catalytic hydrogenation of DMO, in which the incorporation of a suitable amount of promoters (La, Ag, Au, B) was reported to enhance the catalytic activity and stability of the Cu/SiO 2 catalyst. It is suggested that the coexistence of Cu + and Cu 0 sites in the proper distribution on the catalyst surfaces is vital for the hydrogenation of C–O bonds.…”

Section: Copper-based Catalysts For Hydrogenation Of Co2-derived Ethy...mentioning

confidence: 99%

Engineered Chemical Utilization of CO₂ to Methanol via Direct and Indirect Hydrogenation Pathways: A Review

Fayisa

Yang

Zhen

et al. 2022

Ind. Eng. Chem. Res.

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Nowadays, more than 80% of the world’s energy supply is provided by nonrenewable fossil fuels (oil, coal, and natural gas), which are the main sources of CO2 emission. The conversion of CO2 into the most useful organic chemicals (methanol and ethylene glycol (EG)) not only effectively mitigates CO2 emissions but also produces value-added chemicals and replaces nonrenewable energy sources. This Review provides a comprehensive view of the significant research progress on indirect CO2 hydrogenation to methanol and EG through the ethylene carbonate intermediate. First, the advances and challenges of direct catalytic hydrogenation of CO2 to methanol are addressed. Subsequently, the advances in CO2 epoxidation to cyclic carbonates, particularly to ethylene carbonate, are summarized. This matured and commercialized ethylene carbonate (EC) production route is vital because of the efficient production of EG and methanol from catalytic hydrogenation of EC and hydrolysis of EC to EG, which replaces the conventional EG production process by hydration of ethylene oxide. Then, the progress on the catalytic hydrogenation of CO2-derived EC is discussed in detail, focusing on Cu-based heterogeneous catalysts. We provided a detailed discussion with emphasis on the nature, evolution, and precise role of active sites in Cu-based catalysts, including other influencing factors such as the preparation method, support, and addition of promoters. Moreover, the possible hydrogenation reaction mechanism, reaction conditions, design optimization, and on-site assessment of Cu-based catalysts for EC hydrogenation are included. Lastly, we provided a summary and outlook.

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Activated carbon aerogel supported copper catalysts for the hydrogenation of methyl acetate to ethanol: effect of KOH activation

Abstract: Methyl acetate (MA) hydrogenation is crucial for indirect ethanol synthesis through syngas (CO + H2).

Cited by 19 publications

References 55 publications

Hydrogenation of Carboxylic Acids, Esters, and Related Compounds over Heterogeneous Catalysts: A Step toward Sustainable and Carbon-Neutral Processes

Hydrogenation of Carboxylic Acids, Esters, and Related Compounds over Heterogeneous Catalysts: A Step toward Sustainable and Carbon-Neutral Processes

Organic aerogel as electro‐catalytic support in low‐temperature fuel cell

Engineered Chemical Utilization of CO₂ to Methanol via Direct and Indirect Hydrogenation Pathways: A Review

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Activated carbon aerogel supported copper catalysts for the hydrogenation of methyl acetate to ethanol: effect of KOH activation

Abstract: Methyl acetate (MA) hydrogenation is crucial for indirect ethanol synthesis through syngas (CO + H2).

Cited by 19 publications

References 55 publications

Hydrogenation of Carboxylic Acids, Esters, and Related Compounds over Heterogeneous Catalysts: A Step toward Sustainable and Carbon-Neutral Processes

Hydrogenation of Carboxylic Acids, Esters, and Related Compounds over Heterogeneous Catalysts: A Step toward Sustainable and Carbon-Neutral Processes

Organic aerogel as electro‐catalytic support in low‐temperature fuel cell

Engineered Chemical Utilization of CO2 to Methanol via Direct and Indirect Hydrogenation Pathways: A Review

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Engineered Chemical Utilization of CO₂ to Methanol via Direct and Indirect Hydrogenation Pathways: A Review