SMSI-like behavior and Ni promotion effect on NiZnAl catalysts in steam reforming of methanol

Men, Yongfeng; Yang, Mei

doi:10.1016/j.catcom.2012.02.012

Cited by 32 publications

(9 citation statements)

References 30 publications

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“…The reaction is characterized by strong metal support interaction (SMSI). 246 Lu et al studied the effect of adding La on various Ni on Al 2 O 3 , MgO, and SiO 2 catalysts for hydrogen production via SRM. The results indicated that selectivity for CO decreased after the addition of La.…”

Section: Cu-based Catalystsmentioning

confidence: 99%

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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%

“…The presence of Ni and Zn at the same time results in better catalytic activity and a higher yield of hydrogen than single metal catalysts. The reaction is characterized by strong metal support interaction (SMSI) …”

Section: Group Viii–xii 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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“…ZnO as a support promoter gives special physico‐chemical properties to Ni/Al 2 O 3 catalyst. Employing Ni/ZnO–Al 2 O 3 catalysts in methanol and ethanol steam reforming, ethanol partial oxidation, and oleic acid deoxygenation into alkanes has been widely reported. Chen et al .…”

Section: Introductionmentioning

confidence: 99%

“…[14][15][16][17] ZnO as a support promoter gives special physico-chemical properties to Ni/Al 2 O 3 catalyst. Employing Ni/ZnO-Al 2 O 3 catalysts in methanol and ethanol steam reforming, [18][19][20][21][22][23] ethanol partial oxidation, 22 and oleic acid deoxygenation into alkanes 24 has been widely reported. Chen et al 24 showed that higher Zn/Al ratio improves Ni reducibility by weakening the interaction between active phase and support.…”

Section: Introductionmentioning

confidence: 99%

Catalytic performance of Ni supported on ZnO‐Al₂O₃ composites with different Zn content in methane dry reforming

Nataj

Alavi

Mazloom

2019

J of Chemical Tech & Biotech

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BACKGROUND Because of increasing environmental contaminations, hydrogen has attracted much attention as an effective and clean energy source. In addition, hydrogen and syngas are raw materials used in the production of valuable compounds. Methane dry reforming is one common method for syngas production. In this work, Ni catalysts supported on different ZnO–Al2O3 composite oxides were prepared. The effects of variation in Zn/Al ratio (Zn/Al = 0, 0.33, 0.5, 1, 2 and 3) on physico‐chemical properties and their activity and stability in methane dry reforming were investigated. RESULTS The results indicated that Zn addition led to decreasing surface area, weakening the interaction between active phase and support, improving Ni reduction and therefore enhancing initial activity. CONCLUSION When Zn content was low or just enough to produce ZnAl2O4 phase, only metallic Ni particles were detected after reaction which led to carbon filaments formation and deactivation of catalysts. Increasing Zn content formed NiZn alloy that played essential roles in activity and stability. High amounts of Zn (Zn/Al = 3) did not favor promoting effects due to the increasing active phase sizes and decreasing contact area. Ni/ZnO–Al2O3 with Zn/Al = 2 exhibited the highest activity and stability in methane dry reforming. © 2018 Society of Chemical Industry

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“…58 Some of the common catalysts are alkaline earth catalysts (e.g., KOH, KHCO 3 , Na 3 PO 4 , MgO, and NaOH), 26,59 metal-based catalysts (e.g., Ni/Al 2 O 3 . Ni/Al, Ni/Zn/Al, Cu/Zn/Zr, Rh/Zr/Ce, Pt/Co/CeO 2 , and Ru/SrO-Al 2 O 3 ), [60][61][62][63][64][65][66][67] and mineral catalysts (dolomite and olivine). 68,69 The activity of the metal-based catalysts supported on Al 2 O 3 -MgO is in an order of Ru > Rh > Ir > Ni > Pt.…”

Section: Making Hydrogen From Biomassmentioning

confidence: 99%

Renewable hydrogen for the chemical industry

Rambhujun

Salman

Wang

et al. 2020

MRS Energy & Sustainability

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SMSI-like behavior and Ni promotion effect on NiZnAl catalysts in steam reforming of methanol

Cited by 32 publications

References 30 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

Catalytic performance of Ni supported on ZnO‐Al₂O₃ composites with different Zn content in methane dry reforming

Renewable hydrogen for the chemical industry

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SMSI-like behavior and Ni promotion effect on NiZnAl catalysts in steam reforming of methanol

Cited by 32 publications

References 30 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

Catalytic performance of Ni supported on ZnO‐Al2O3 composites with different Zn content in methane dry reforming

Renewable hydrogen for the chemical industry

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Product

Resources

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Catalytic performance of Ni supported on ZnO‐Al₂O₃ composites with different Zn content in methane dry reforming