Non-precious Metal Catalysts for Acetic Acid Reduction

Onyestyák, György

doi:10.3311/ppch.10502

Cited by 5 publications

(10 citation statements)

References 20 publications

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“…G. Onyestyak compared the performance of SiO 2 -supported mono metals (Co, Ni, Cu, Fe, Pt and Zn) in hydrogenation of acetic acid with a fixed bed reactor at high temperatures between 513 and 653 K ( Table 2, entry 3). [54] Co, Ni and Cu catalysts showed higher activity with comparatively high selectivity, while the other metal catalysts showed lower activity and lower selectivity to the alcohol because of hydrodecarbonylation to methane, CO 2 and water. Among these catalysts, Co/SiO 2 showed higher activity, and the selectivity to ethanol is also high (~98%).…”

Section: Monometallic Catalysts With a Non-noble Metal (Cu Ni Co Mo)mentioning

confidence: 98%

“…Among the non‐noble metal catalysts, Co‐based catalysts seem to show higher activity than other non‐noble metal species except above non‐noble metals such as Cu and Ni species. G. Onyestyak compared the performance of SiO 2 ‐supported mono metals (Co, Ni, Cu, Fe, Pt and Zn) in hydrogenation of acetic acid with a fixed bed reactor at high temperatures between 513 and 653 K (Table , entry 3) . Co, Ni and Cu catalysts showed higher activity with comparatively high selectivity, while the other metal catalysts showed lower activity and lower selectivity to the alcohol because of hydrodecarbonylation to methane, CO 2 and water.…”

Section: Heterogeneous Monometallic Catalystsmentioning

confidence: 99%

“…Onyestyák also investigated introduction of In 2 O 3 species to Co/Fumed SiO 2 in hydrogenation of acetic acid (Table , entry 17) . The positive effect was not observed by introduction of In 2 O 3 species, although the Co/Fumed SiO 2 showed high yield and selectivity to ethanol.…”

Section: Heterogeneous Catalysts With Bimetallic Speciesmentioning

confidence: 99%

“…Recently, non‐noble metal‐based catalysts have attracted much attention as the alternatives for noble metals because of the high demand for extrication of use of noble metals. Recently, simple Co catalysts have been developed for the hydrogenation of carboxylic acids (Table , entries 5–7,). Among the non‐noble metal catalysts, Co‐based catalysts seem to show higher activity than other non‐noble metal species except above non‐noble metals such as Cu and Ni species.…”

Section: Heterogeneous Monometallic Catalystsmentioning

confidence: 99%

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Recent Developments of Heterogeneous Catalysts for Hydrogenation of Carboxylic Acids to their Corresponding Alcohols

2020

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Hydrogenation of carboxylic acids is an important organic reaction for the synthesis of alcohols, aldehydes, alkanes, and so on. Selective hydrogenation of carboxylic acids to alcohols is particularly important because alcohols are useful and valuable chemicals. However, the hydrogenation of carboxylic acids is difficult due to the low reactivity of the carboxy group and the acidic property, which require rational design of catalysts. Up to now, various effective homogeneous and heterogeneous catalysts have been intensively developed, and remarkable advances have been made in heterogeneous catalysts. In this minireview, recent progress (2010 and after) on the development of heterogeneous catalysts for hydrogenation of carboxylic acids to alcohols, particularly for monocarboxylic acids to mono primary alcohols, is reviewed. The reported literatures were categorized in terms of catalyst systems, such as monometallic catalysts and bimetallic catalysts. The characteristics, particularly the structure of active sites, reaction mechanism and stability, were introduced.

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Section: Monometallic Catalysts With a Non-noble Metal (Cu Ni Co Mo)mentioning

confidence: 98%

Section: Heterogeneous Monometallic Catalystsmentioning

confidence: 99%

Section: Heterogeneous Catalysts With Bimetallic Speciesmentioning

confidence: 99%

Section: Heterogeneous Monometallic Catalystsmentioning

confidence: 99%

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Recent Developments of Heterogeneous Catalysts for Hydrogenation of Carboxylic Acids to their Corresponding Alcohols

2020

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“…When compared against the parent monometallic catalyst, a systematic suppression of the hydro-decarbonylation reaction was found. [39][40][41] By analogy, we propose that indium poisons the surface of metallic cobalt, hindering its total hydrogenation activity (approximately 80% CO2 conversion on metallic Co vs. 19% on In@Co-1). This surface modification may also prevent methane formation due to a slower hydrogenolysis rate of the C-O bond compared to the desorption rate of the CO and CH3OH intermediates.…”

Section: Figure 4 Adf-stem Imaging and Elemental Mapping Of Metallic mentioning

confidence: 99%

Turning a Methanation Catalyst into a Methanol Producer: In-Co Catalysts for the Direct Hydrogenation of CO2 to Methanol

Bavykina¹,

Yarulina²,

Gevers³

et al. 2018

Preprint

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<div> <div> <div> <p>The direct hydrogenation of CO2 to methanol using green hydrogen is regarded as a potential technology to reduce greenhouse gas emissions and the dependence on fossil fuels. For this technology to become feasible, highly selective and productive catalysts that can operate under a wide range of reaction conditions near thermodynamic conversion are required. Here, we demonstrate that indium in close contact with cobalt catalyses the formation of methanol from CO2 with high selectivity (>80%) and productivity (0.86 gCH3OH.gcatalyst-1.h-1) at conversion levels close to thermodynamic equilibrium, even at temperatures as high as 300 °C and at moderate pressures (50 bar). The studied In@Co system, obtained via co- precipitation, undergoes in situ transformation under the reaction conditions to form the active phase. Extensive characterization demonstrates that the active catalyst is composed of a mixed metal carbide (Co3InC0.75), indium oxide (In2O3) and metallic Co. </p> </div> </div> </div>

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Heterogeneously Catalyzed Carboxylic Acid Hydrogenation to Alcohols

Karam

Neumann

2022

ChemCatChem

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This critical review discusses the synthesis of alcohols via hydrogenation of carboxylic acids promoted by heterogeneous metal catalysis. The introductory chapter rationalizes the comparative reactivity of carboxylic acid derivatives, which is proceeded by a description of different mechanisms for carboxylic acid hydrogenation. Reaction pathways are discussed that give rise to undesired side products, before comparing the reactivity of different classes of carboxylic acid substrates with a focus on biomass‐derived carboxylic acids. The final portion of the review aims to guide researchers in the selection of appropriate reaction conditions, such as the choice of solvent, transition metal, and catalyst support.

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Non-precious Metal Catalysts for Acetic Acid Reduction

Abstract: Acetic acid (AA) hydroconversion was studied over various monometallic (Fe, Co, Ni, Cu, Zn, Pt)

Cited by 5 publications

References 20 publications

Recent Developments of Heterogeneous Catalysts for Hydrogenation of Carboxylic Acids to their Corresponding Alcohols

Recent Developments of Heterogeneous Catalysts for Hydrogenation of Carboxylic Acids to their Corresponding Alcohols

Turning a Methanation Catalyst into a Methanol Producer: In-Co Catalysts for the Direct Hydrogenation of CO2 to Methanol

Heterogeneously Catalyzed Carboxylic Acid Hydrogenation to Alcohols

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