Investigation of the role of Nb on Pd−Zr−Zn catalyst in methanol steam reforming for hydrogen production

Cai, Fufeng; Lu, Peipei; Ibrahim, Jessica Juweriah; Fu, Yu; Zhang, Jun; Sun, Yuhan

doi:10.1016/j.ijhydene.2019.03.125

Cited by 52 publications

(19 citation statements)

References 52 publications

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“…As seen from Fig. 7, For the CZA catalysts, the CH3OH conversion increased with increasing temperature and the highest conversion was obtained at 320℃, which is consistent with results reported in the literature [22,23]. In the case of CZA-500, the lowest catalytic performance was obtained at 200-320℃ compared to the CZA-400 and CZA-450 catalysts, which may be due to the larger particle size, smaller surface area and lower dispersion of Cu The CZA-400 catalyst had higher conversion under 280℃ than other samples, which could be due to its higher dispersion of Cu and larger surface area.…”

Section: H2-tprsupporting

confidence: 90%

Influence of the Preparation Conditions on the Reaction Performance on Steam Reforming of Methanol in a Cu/Zn/Al model catalyst

Yao

et al. 2021

Preprint

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The model Cu/Zn/Al catalysts with different calcination temperature were prepared by hydrothermal method. The catalysts were characterized by XRD, BET, SEM, CO2-TPD, H2-TPR, TG, CH3OH-TPD and CO2+H2-TPSR. The effect of different calcination temperature on structure, stability and catalytic performance for methanol steam reforming at the conditions of 200-320℃ was also represented. The results of present study show that the different calcination temperature of Cu/Zn/Al catalysts had an obvious influence on the physical characteristics and catalytic performance of the methanol steam reforming.

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Section: H2-tprsupporting

confidence: 90%

Influence of the Preparation Conditions on the Reaction Performance on Steam Reforming of Methanol in a Cu/Zn/Al model catalyst

Yao

et al. 2021

Preprint

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“…Furthermore, the addition of Nb to Pd−Zr−Zn led to the fusion of Pd in ZnO lattices, leading to decreased CO selectivity. 233 Table 1 Summarizes Pd-based catalysts used in SRM.…”

Section: Cu-based Catalystsmentioning

confidence: 99%

“…This leads to an enhanced interaction between Pt active sites and α-MoC 1−x , promoting catalytic performance; 0.5Zn−Pt/MoC catalyst showed exceptional performance with a lower carbon monoxide selectivity at lower temperatures (120−200 °C). 233 Lytkina et al studied various supports for Ru−Rh-based catalysts and compared their performance in conventional and The reduced selectivity for CO was attributed to the development of more oxygen vacancies due to a smaller particle size, more scattered dispersion of Pt, and the presence of SMSI. Pt/In 2 O 3 catalyst supported on CeO 2 exhibited prolonged stability with the least CO selectivity for steam reforming up to 100 h. Thus, the role of support remains to be an important factor in catalytic reactions (Figure 10).…”

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.

201

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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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“…Bulk catalyst refers to the whole catalyst particle, its external surface, and internal components, where almost all of them are active substances. Some examples of bulk catalysts are silica-aluminum catalysts for catalytic cracking and ammonia synthesis, zinc-chromium oxide or copper-zinc-aluminum catalysts for hydrogen production, and iron molybdate catalysts for methanol oxidation [4][5][6][7]. The main chemical processes for the preparation of such catalysts are precipitation, gelation, and crystallization.…”

Section: Bulk Catalystsmentioning

confidence: 99%

Heterogeneous Catalytic Process for Wastewater Treatment

Zhang¹

2020

Advanced Oxidation Processes - Applications, Trends, and Prospects

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This chapter introduced heterogeneous catalysis and described diverse heterogeneous catalytic processes for wastewater treatment. The main advantages of heterogeneous catalysis were explained compared with homogeneous catalysis. The methods of synthesis and characterization of heterogeneous catalysts with some examples were then elaborated. The principle of heterogeneous catalytic treatment process of refractory wastewater was analyzed, and several different types of heterogeneous catalytic oxidation processes, technical progresses, and application examples were presented. The mechanisms of heterogeneous catalytic oxidation degradation of pollutants in wastewater were also discussed. According to the review, the heterogeneous catalytic oxidation technology was considered having a good application prospect, and the further research directions of heterogeneous catalysis were proposed.

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Investigation of the role of Nb on Pd−Zr−Zn catalyst in methanol steam reforming for hydrogen production

Cited by 52 publications

References 52 publications

Influence of the Preparation Conditions on the Reaction Performance on Steam Reforming of Methanol in a Cu/Zn/Al model catalyst

Influence of the Preparation Conditions on the Reaction Performance on Steam Reforming of Methanol in a Cu/Zn/Al model catalyst

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

Heterogeneous Catalytic Process for Wastewater Treatment

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