The role of various fuels on microwave-enhanced combustion synthesis of CuO/ZnO/Al2O3 nanocatalyst used in hydrogen production via methanol steam reforming

Ajamein, Hossein; Alaei, Shervin

doi:10.1016/j.enconman.2017.01.044

Cited by 54 publications

(28 citation statements)

References 49 publications

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“…Therefore, by increasing the amount of active phase in the catalysts, larger and less dispersed crystallites was obtained on the surface. The average sizes obtained for the particles were 21.8 ± 7.1 nm, 30.6 ± 12.8 nm, and 42.1 ± 40.7 nm for catalysts A1, A4, and A5, respectively, all close to that found by Ajamein et al (26.5 nm) in their 30 %CuO‐60 %ZnO‐Al 2 O 3 (% in mol) nano‐catalysts produced by the microwave enhanced combustion method. From Figure , Figure , and Figure it was also observed that the standard deviation increased with increasing the Cu and Zn content, indicating a more heterogeneous particle size distribution.…”

Section: Resultssupporting

confidence: 85%

“…Ajamein et al synthesized a series of 30 %CuO‐60 %ZnO‐10 %Al 2 O 3 nano‐catalysts using the microwave enhanced combustion method to be used in methanol steam reforming. The catalytic experiments showed that, for 400 mg of catalyst, water/methanol molar ratio of 1.5, GHSV = 10 000 h −1 , and reaction temperatures between 160 and 200 °C, there was no CO formation.…”

Section: Introductionmentioning

confidence: 99%

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Utilization of sol‐gel CuO‐ZnO‐Al₂O₃ catalysts in the methanol steam reforming for hydrogen production

et al. 2017

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In this work five CuO‐ZnO‐Al2O3 catalysts were synthesized using the sol‐gel method, with different Cu percentages, for use in the methanol steam reforming reaction, at 300 °C, aiming to generate hydrogen for PEM (Polymer Electrolyte Membrane) fuel cells. The specific area and total pore volume of the materials decreased with increasing Cu content and consequently reduced the alumina content. Also, the area decreased with increasing the calcination temperature, due to the sintering and coalescence of Cu crystals. The metal dispersion decreased (from 32 to 4 %) with increasing the Cu amount (from 8.9 to 48.4 %). For this reaction, the catalyst with the second highest Cu concentration (40.6 %) was the most active and had the higher Cu area (34.8 m2Cu/gcat). Meanwhile, the catalyst with the lowest Cu content (8.9 %) had its active sites better used, presenting the highest turnover frequency, specific area, and metal dispersion. The experimental results indicated that there was an optimum composition for the catalyst, which would provide the best area and dispersion for the reaction, with a view to industrial application. This composition was statistically calculated to be 33 % (g/g) of Cu.

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Section: Resultssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Utilization of sol‐gel CuO‐ZnO‐Al₂O₃ catalysts in the methanol steam reforming for hydrogen production

et al. 2017

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“…Journal of Nanomaterials nanocatalysts rely on size and morphology of the synthesized material. Different methods are available in the literature to describe the synthetic procedures for controlling the size and morphology of the zinc oxide nanocatalysts such as coprecipitation [119], microwave assisted [153], combustion [154], ion exchange, and vapor phase transport [155]. In 2015, Saikia et al reported the synthesis of zinc oxide nanocatalysts through the leaf extract of Carica papaya and its application in the synthesis of oxime derivatives [156].…”

mentioning

confidence: 99%

Recent Developments in Nanostructured Palladium and Other Metal Catalysts for Organic Transformation

Hussain

Kamal

Hossain

2019

Journal of Nanomaterials

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Nanocatalysis is an emerging field of research and is applicable to nearly all kinds of catalytic organic conversions. Nanotechnology is playing an important role in both industrial applications and academic research. The catalytic activities become pronounced as the size of the catalyst reduces and the surface area-to-volume ratio increases which ultimately enhance the activity and selectivity of nanocatalysts. Similarly, the morphology of the particles also has a great impact on the activity and selectivity of nanocatalysts. Moreover, the electronic properties and geometric structure of nanocatalysts can be affected by polar and nonpolar solvents. Various forms of nanocatalysts have been reported including supported nanocatalysts, Schiff-based nanocatalysts, graphene-based nanocatalysts, thin-film nanocatalysts, mixed metal oxide nanocatalysts, magnetic nanocatalysts, and core-shell nanocatalysts. Among a variety of different rare earth and transition metals, palladium-based nanocatalysts have been extensively studied both in academia and in the industry because of their applications such as in carbon-carbon cross-coupling reactions, carbon-carbon homocoupling reactions, carbon-heteroatom cross-coupling reactions, and C-H activation, hydrogenation, esterification, oxidation, and reduction. The current review highlights the recent developments in the synthesis of palladium and some other metal nanocatalysts and their potential applications in various organic reactions.

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“…Ethylene glycol with 2 hydroxyl groups and lower molecular weight had lower copper oxide crystallinity. Dispersion of Cu(1 1 1) − as the most important active site for the methanol steam reforming reaction − on the structure of fabricated nanocatalyst led to better accessibility of reactants to active sites and subsequently higher methanol conversion …”

Section: Hydrogen Production Processesmentioning

confidence: 99%

Review of Recent Studies on Solution Combustion Synthesis of Nanostructured Catalysts

et al. 2018

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Solution combustion synthesis (SCS) is a relatively new method for synthesizing catalytic materials with many distinct advantages: simplicity of method, short reaction times, and the capability to regulate crystal lattice parameters and thereby the activity and selectivity of catalysts. Over the last years, SCS has been used for the production and study of a multitude of new catalytic materials. This review considers and discusses the recent developments and trends in SCS of nanocatalysts, while special attention is paid to the development and applications of nanostructured catalysts.

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The role of various fuels on microwave-enhanced combustion synthesis of CuO/ZnO/Al2O3 nanocatalyst used in hydrogen production via methanol steam reforming

Cited by 54 publications

References 49 publications

Utilization of sol‐gel CuO‐ZnO‐Al₂O₃ catalysts in the methanol steam reforming for hydrogen production

Utilization of sol‐gel CuO‐ZnO‐Al₂O₃ catalysts in the methanol steam reforming for hydrogen production

Recent Developments in Nanostructured Palladium and Other Metal Catalysts for Organic Transformation

Review of Recent Studies on Solution Combustion Synthesis of Nanostructured Catalysts

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The role of various fuels on microwave-enhanced combustion synthesis of CuO/ZnO/Al2O3 nanocatalyst used in hydrogen production via methanol steam reforming

Cited by 54 publications

References 49 publications

Utilization of sol‐gel CuO‐ZnO‐Al2O3 catalysts in the methanol steam reforming for hydrogen production

Utilization of sol‐gel CuO‐ZnO‐Al2O3 catalysts in the methanol steam reforming for hydrogen production

Recent Developments in Nanostructured Palladium and Other Metal Catalysts for Organic Transformation

Review of Recent Studies on Solution Combustion Synthesis of Nanostructured Catalysts

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Product

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Utilization of sol‐gel CuO‐ZnO‐Al₂O₃ catalysts in the methanol steam reforming for hydrogen production

Utilization of sol‐gel CuO‐ZnO‐Al₂O₃ catalysts in the methanol steam reforming for hydrogen production