(Ni,Cu)/hexagonal BN nanohybrids – New efficient catalysts for methanol steam reforming and carbon monoxide oxidation

Kovalskii, Andrey M.; Matveev, Andrei T.; Попов, Захар И.; Volkov, Ilia N.; Sukhanova, Ekaterina V.; Лыткина, А. А.; Yaroslavtsev, A. B.; Konopatsky, Anton S.; Leybo, Denis V.; Бондарев, А.В.; Щетинин, И. В.; Firestein, Konstantin L.; Shtansky, Dmitry V.; Golberg, Dmitri

doi:10.1016/j.cej.2020.125109

Cited by 45 publications

(22 citation statements)

References 76 publications

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“…The catalyst showed excellent performance with no CO formation during the entire reaction. 102 To enhance the activity and overcome the disadvantages, stabilizers and promoters are very commonly used for copper zinc catalysts. When Al is not added to Cu/Zn and the catalyst containing 40Cu-60Zn wt % is used, it starts to deactivate at 230 °C after 20 h. The addition of Al in the Cu/Zn catalyst, containing 40Cu-55Zn-5Al wt %, showed considerable improvement in stability up to 110 h and selectivity for hydrogen and carbon dioxide.…”

Section: Cu-based Catalystsmentioning

confidence: 99%

Steam Reforming of Methanol for Hydrogen Production: A Critical Analysis of Catalysis, Processes, and Scope

Ranjekar

Yadav

2021

Ind. Eng. Chem. Res.

198

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The hydrogen economy is being pursued quite vigorously since hydrogen is an important and green energy source with a variety of applications as fuel for transportation, fuel cell, feedstock, energy vector, reforming in refineries, carbon dioxide valorization, biomass conversion, etc. Steam reforming of alcohols is a well-established technique to obtain syngas. Methanol is viewed to be a lucrative alternative for fossil fuels, due to its flexibility in being generated from multiple sources, high energy density, and low operating temperatures. The catalysts used for reforming govern the methanol conversion rate and the ratio of gaseous products, i.e., H2, CO, and CO2. Group VIII–XII metals have been widely utilized for methanol steam reforming as they have a higher hydrogen yield. Several other catalysts and novel techniques have been developed and used to date. Quite a few strategies to enhance the performance of catalysts and reduce deactivation have been discussed. This review focuses on the metallic catalysts, mainly Cu, Pd, Zn, with different formulations and compositions for steam reforming of methanol (SRM). Active catalyst components, supports, and their interactions, along with different promoters, are reviewed, and their performances are critically analyzed. The various reaction mechanisms and reaction pathways have been identified and elaborated. A fundamental understanding of the functionality and structure of catalysts is required no matter which alcohol is used as a feedstock, and some general inferences can be obtained from polyhydroxyl feed for the steam reforming of methanol, which is the subject matter of this review. Particularly, the role of copper as a component in mono and multimetallic systems and the nature of support must be studied fundamentally to get high hydrogen yields. It is important to determine how metal support interactions, including oxygen transfer from reducible oxides to the metal site, influence the catalyst activity, selectivity, and stability. Further, the mechanism by which alloying affects the selectivity in multimetallic catalysts must be understood by using high-end characterizations.

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Section: Cu-based Catalystsmentioning

confidence: 99%

Steam Reforming of Methanol for Hydrogen Production: A Critical Analysis of Catalysis, Processes, and Scope

Ranjekar

Yadav

2021

Ind. Eng. Chem. Res.

198

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“…CuO/ZnO was successfully loaded onto a metal-organic framework material (Cu-BTC), thus improving the stability [37]. (Ni 0.2 Cu 0.8 )/boron nitride nanohybrids have been studied, showing high catalytic stability and high CO 2 selectivity, moreover no carbon monoxide was detected during the full methanol conversion [38].…”

Section: Methanol Steam Reformingmentioning

confidence: 99%

Main Hydrogen Production Processes: An Overview

et al. 2021

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Due to its characteristics, hydrogen is considered the energy carrier of the future. Its use as a fuel generates reduced pollution, as if burned it almost exclusively produces water vapor. Hydrogen can be produced from numerous sources, both of fossil and renewable origin, and with as many production processes, which can use renewable or non-renewable energy sources. To achieve carbon neutrality, the sources must necessarily be renewable, and the production processes themselves must use renewable energy sources. In this review article the main characteristics of the most used hydrogen production methods are summarized, mainly focusing on renewable feedstocks, furthermore a series of relevant articles published in the last year, are reviewed. The production methods are grouped according to the type of energy they use; and at the end of each section the strengths and limitations of the processes are highlighted. The conclusions compare the main characteristics of the production processes studied and contextualize their possible use.

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“…In case of methanol In accordance with thermodynamics, reaction (1) dominates at low temperatures that in many cases make it possible to obtain products with low CO content. For this, it is necessary to carry out the process using catalysts based on copper, nickel, or noble metals [17][18][19][20][21][22][23]. In particular, high catalytic activity of nickel-copper and platinum-rhodium alloys has been shown [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Methanol Steam Reforming on Bimetallic Catalysts Based on In and Nb Doped Titania or Zirconia: A Support Effect

2021

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Methanol steam reforming (MSR) is considered an effective method for hydrogen storage and to generate high-quality hydrogen for fuel cells. In this work, a comprehensive investigation of the methanol steam reforming process using a bimetallic Pt–Rh and Cu–Ni based on different oxide supports is presented. Highly dispersed titania and zirconia doped with indium and niobium ions were synthesized by sol–gel method. The effect of the nature and quantity of the dopant cation (In, Nb) on the catalytic performance of titania supported metal catalysts was investigated. The conclusions obtained show a significant effect of both the metal alloy and the oxide support nature on the activity and selectivity of the methanol steam reforming process. Pt–Rh alloy catalyst shows higher hydrogen yield, but its selectivity in the MSR process is lower than for the catalysts containing the Cu0.8-Ni0.2 alloy. Heterovalent indium doping of titania leads to the catalytic activity increase. It was suggested that this is due to the defects formation in the oxygen TiO2 sublattice. On the contrary, the use of niobium oxide as a dopant decreases the catalyst activity in the methanol steam reforming process but leads to the selectivity increase in the studied process.

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(Ni,Cu)/hexagonal BN nanohybrids – New efficient catalysts for methanol steam reforming and carbon monoxide oxidation

Cited by 45 publications

References 76 publications

Steam Reforming of Methanol for Hydrogen Production: A Critical Analysis of Catalysis, Processes, and Scope

Steam Reforming of Methanol for Hydrogen Production: A Critical Analysis of Catalysis, Processes, and Scope

Main Hydrogen Production Processes: An Overview

Methanol Steam Reforming on Bimetallic Catalysts Based on In and Nb Doped Titania or Zirconia: A Support Effect

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