Synthesis and application of Ni-Co bimetallic catalysts supported on hollow sphere Al2O3 in steam methane reforming

Zarei-Jelyani, Fatemeh; Salahi, Fatemeh; Farsi, M.; Rahimpour, Mohammad Reza

doi:10.1016/j.fuel.2022.124785

Cited by 29 publications

(9 citation statements)

References 39 publications

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“…Its use in Ni-based catalysts in SMR can promote carbon gasification due to its high oxygen mobility [112,113]. Another positive aspect is the formation of Ni-Co alloys, which hinder carbon formation [114,115]. Zarei-Jelyani et al [115] tried different Ni/Co mass ratios in bimetallic Ni-Co/Al 2 O 3 .…”

Section: Feed Ratio Tos [H] Space Velocity or Residence Timementioning

confidence: 99%

Catalytic Biomass Gasification in Supercritical Water and Product Gas Upgrading

Vadarlis,

Angeli,

Lemonidou

et al. 2023

ChemBioEng Reviews

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The gasification of biomass with supercritical water, also known as SCWG, is a sustainable method of hydrogen production. The process produces a mixture of hydrogen, carbon oxides, and hydrocarbons. Upgrading this mixture through steam or dry reforming of hydrocarbons to create synthesis gas and then extra hydrogen is a viable way to increase hydrogen production from biomass. This literature review discusses combining these two processes and recent experimental work on catalytic SCWG of biomass and its model compounds and steam/dry reforming of produced hydrocarbons. It focuses on catalysts used in these processes and their key criteria, such as activity, selectivity towards hydrogen and methane, and ability to inhibit carbon formation and deposition. A new criterion is proposed to evaluate catalyst performance in biomass SCWG and the need for further upgrading via reforming, based on the ratio of hydrogen bound in hydrocarbons to total hydrogen produced during SCWG. The review concludes that most catalysts used in biomass SCWG trap a large proportion of hydrogen in hydrocarbons, necessitating further processing of the product stream.

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Section: Feed Ratio Tos [H] Space Velocity or Residence Timementioning

confidence: 99%

Catalytic Biomass Gasification in Supercritical Water and Product Gas Upgrading

Vadarlis,

Angeli,

Lemonidou

et al. 2023

ChemBioEng Reviews

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“…In addition, its primary nature in the catalyst is to work as a stable support for active metal components, providing a strong mechanical strength, large specific surface, and well-developed pore structure. [25,37,[44][45][46][47] catalysts in HOAc steam reforming, and found that the mesoporous γ-Al 2 O 3 support had higher specific surface area and pore volume, and with larger Lewis acidity than those of the MgO support, resulting a higher activity. [25] To the best of our knowledge, there are few studies conducted on HOAc steam reforming using W-doped Co/Al 2 O 3 catalysts.…”

Section: Introductionmentioning

confidence: 99%

“…The ability is affected by the strength of surface acidity and basicity. In addition, its primary nature in the catalyst is to work as a stable support for active metal components, providing a strong mechanical strength, large specific surface, and well‐developed pore structure [25,37,44–47] . Goicoechea et al.…”

Section: Introductionmentioning

confidence: 99%

“…Comparing to the single metal Co, bimetallic CoÀ M based catalysts had been reported to perform better activity in HOAc steam reforming. [35][36][37] Megía et al compared the catalytic activity of Co/SBA-15 and CoÀ Cr/ SBA-15 in HOAc steam reforming, and found that HOAc conversion on the CoÀ Cr/SBA-15 was 90 %, which was significantly higher than that of Co/SBA-15. [38] Hu et al also investigated the effects of Zr, Mg and K additions in Co/Al 2 O 3 on the catalytic performances of HOAc steam reforming.…”

Section: Introductionmentioning

confidence: 99%

“…compared the performance of Co and Ni based catalysts (Co/OXAWSL and Ni/OXAWSL) in toluene steam reforming for H 2 production, and found that the Co‐based catalyst was more active and more stable than the Ni‐based catalysts. Comparing to the single metal Co, bimetallic Co−M based catalysts had been reported to perform better activity in HOAc steam reforming [35–37] . Megía et al.…”

Section: Introductionmentioning

confidence: 99%

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Addition of tungsten in Co/Al₂O₃ to catalyse the production of hydrogen through acetic acid steam reforming

Wang

et al. 2023

ChemistrySelect

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Steam reforming of bio-oil is a promising green hydrogen production technology. Experimental and theoretical calculations have been carried out to study the performance of Co/ Al 2 O 3 catalysts doped with tungsten (1-10 wt%) for bio-oil model compound acetic acid steam reforming. The maximum acetic acid conversion of 95.4 % and H 2 yield of 93.5 % were obtained over the 15Co-5W/Al 2 O 3 catalyst under the optimized reaction conditions of temperature = 550 °C, steam to carbon ratio = 5 and the gas hourly space velocity of 15,780 h À 1 . The feeding capacity of the catalyst was improved by 2.3 times by the addition of 5 wt% W compared to that of the non-W-added Co/Al 2 O 3 catalyst. Catalyst characterizations by BET, XRD, H 2 -TPR, XPS, HRTEM, and SEM were performed. The results showed that high activities were maintained over 20 h on the 15Co-5W/ Al 2 O 3 catalyst. A little filamentous coke was formed on the spent catalyst surface, and the agglomeration rate of active Co was relatively low. Density functional theory calculations confirmed that the adsorptions of CH 3 COOH and H 2 O on the catalyst were enhanced by the addition of W.

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Recent Advances in Bimetallic Catalysts for Methane Steam Reforming in Hydrogen Production: Current Trends, Challenges, and Future Prospects

Yusuf,

Umar,

Kotob

et al. 2023

Chemistry An Asian Journal

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As energy demand continues to rise and the global population steadily grows, there is a growing interest in exploring alternative, clean, and renewable energy sources. The search for alternatives, such as green hydrogen, as both a fuel and an industrial feedstock, is intensifying. Methane steam reforming (MSR) has long been considered a primary method for hydrogen production, despite its numerous advantages, the activity and stability of the conventional Ni catalysts are major concerns due to carbon formation and metal sintering at high temperatures, posing significant drawbacks to the process. In recent years, significant attention has been given to bimetallic catalysts as a potential solution to overcome the challenges associated with methane steam reforming. Thus, this review focuses on the recent advancements in bimetallic catalysts for hydrogen production through methane steam reforming. The review explores various aspects including reactor type, catalyst selection, and the impact of different operating parameters such as reaction temperature, pressure, feed composition, reactor configuration, and feed and sweep gas flow rates. The analysis and discussion revolve around key performance indicators such as methane conversion, hydrogen recovery, and hydrogen yield.

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Synthesis and application of Ni-Co bimetallic catalysts supported on hollow sphere Al2O3 in steam methane reforming

Cited by 29 publications

References 39 publications

Catalytic Biomass Gasification in Supercritical Water and Product Gas Upgrading

Catalytic Biomass Gasification in Supercritical Water and Product Gas Upgrading

Addition of tungsten in Co/Al₂O₃ to catalyse the production of hydrogen through acetic acid steam reforming

Recent Advances in Bimetallic Catalysts for Methane Steam Reforming in Hydrogen Production: Current Trends, Challenges, and Future Prospects

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Synthesis and application of Ni-Co bimetallic catalysts supported on hollow sphere Al2O3 in steam methane reforming

Cited by 29 publications

References 39 publications

Catalytic Biomass Gasification in Supercritical Water and Product Gas Upgrading

Catalytic Biomass Gasification in Supercritical Water and Product Gas Upgrading

Addition of tungsten in Co/Al2O3 to catalyse the production of hydrogen through acetic acid steam reforming

Recent Advances in Bimetallic Catalysts for Methane Steam Reforming in Hydrogen Production: Current Trends, Challenges, and Future Prospects

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Product

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Addition of tungsten in Co/Al₂O₃ to catalyse the production of hydrogen through acetic acid steam reforming