Hydrogen production by the steam reforming of ethanol over K-promoted Co/Al2O3–CaO xerogel catalysts

Yoo, Sangbeom; Park, Seungwon; Song, Ji Hwan; Kim, Do Heui

doi:10.1016/j.mcat.2020.110980

Cited by 21 publications

(9 citation statements)

References 42 publications

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“…As the content of Ca is ≤4 wt %, the peak intensity of Ni at 2θ = 52.2° decreases gradually, which may be attributed to the introduction of Ca, inhibiting the crystallization of the active component. As the content of Ca is >4 wt %, the diffraction peak of Ni becomes sharper, which might be ascribed to the agglomeration of Ni due to the excessive content of Ca, not conducive to the improvement of the dispersion of active component …”

Section: Resultsmentioning

confidence: 99%

Effect of Ca Promoter on the Structure, Performance, and Carbon Deposition of Ni-Al₂O₃ Catalyst for CO₂-CH₄ Reforming

Wang

et al. 2020

ACS Omega

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Ni-Al2O3 catalyst with different Ca abundance for CO2-CH4 reforming was prepared by the solution combustion method. By some mature characterization methods, such as XRD, H2-TPR, EDX mapping, TEM, TPH and TG-DTG technologies, and the reforming experiment, the effect of Ca content on the structure, reforming performance, and carbon deposition of Ni-Al2O3 catalyst was investigated. Results showed that the grain size of active component Ni on the 4 wt % Ca-modified catalyst (Ni-Ca-4) was small (13.67 nm), presenting good dispersion, and that Ni and Ca elements were well distributed on the support, which was more conducive to the CO2-CH4 reforming. Evaluation results showed that activity of Ni-Ca-4 was higher than the others, with CH4 and CO2 conversions of 52.0 and 96.7%, respectively, and H2/CO ratio close to unit. Carbon deposition proposed that the amount of carbon deposited on the surface of Ni-Ca-4 was lower (18%), and the type of carbon was attributed to amorphous carbon, indicating that 4 wt % Ca-promoted catalyst presented better anticarbon deposition performance.

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Section: Resultsmentioning

confidence: 99%

Effect of Ca Promoter on the Structure, Performance, and Carbon Deposition of Ni-Al₂O₃ Catalyst for CO₂-CH₄ Reforming

Wang

et al. 2020

ACS Omega

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“…Potassium has been successfully used as promoter of Co/Al 2 O 3 -CaO catalysts. The K-promoted catalysts showed higher hydrogen yield and lower methane selectivity than the unpromoted catalysts, mainly due to the suppression of methanation reaction [46]. On the other hands, sodium doping decreases the catalytic activity, but significantly increases the CO 2 selectivity, improving the H 2 selectivity, in Pt/m-ZrO 2 catalysts [47].…”

Section: Ethanol 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 order of importance, Rh, Pt, Pd, Ru, Ir, and Ag as active phases, as well as bimetallic catalysts, have been explored. [53][54][55] Noble metals have been supported over a wide variety of supports (Al 2 O 3 , CeO 2 , ZrO 2 , CeÀ Zr solid solutions, SiO 2 , Y 2 O 3 , Nb 2 O 5 , MgO, TiO 2 ) and it has been found that the metal-support interaction has been found to suppress metal sintering and minimize coke formation. However, due to the high cost of noble metal catalysts, Ni-based materials are being explored the most for the ESR route's ability to produce hydrogen.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Steam Reforming of Ethanol to Produce Hydrogen: Modern and Efficient Catalyst Modification Strategies

El‐Salamony

2023

ChemistrySelect

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Hydrogen is regarded as one of the most promising renewable energy that carriers with a high heating value for replacing fossil fuels and meeting clean energy requirements. Steam reforming has shown considerable promises in the creation of hydrogen. Many studies on catalytic steam reforming of ethanol have been published. Hence, developing efficient and stable catalysts capable of producing large H2 yields and ethanol conversion is a crucial step. Nickel is an essential industrial catalyst because it enhances hydrogenation and dehydrogenation reactions by promoting the scission of C−C bonds. Many studies have been conducted by employing noble metal‐based catalysts to reduce coke deposition and enhance metal stability against sintering since they are known to successfully break the C−C bond, resulting in less carbonaceous deposits and hence more stable catalysts. To avoid carbon production, alkaline promoters, and bimetallic heterogeneous catalysts are commonly utilized in catalysis. However, because huge amounts of by‐product CO2 produced by SRE courses are usually regarded as the primary cause of hydrogen purity degradation, it is recommended to remove CO2 in‐situ to achieve high hydrogen production.

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Hydrogen production by the steam reforming of ethanol over K-promoted Co/Al2O3–CaO xerogel catalysts

Cited by 21 publications

References 42 publications

Effect of Ca Promoter on the Structure, Performance, and Carbon Deposition of Ni-Al₂O₃ Catalyst for CO₂-CH₄ Reforming

Effect of Ca Promoter on the Structure, Performance, and Carbon Deposition of Ni-Al₂O₃ Catalyst for CO₂-CH₄ Reforming

Main Hydrogen Production Processes: An Overview

Catalytic Steam Reforming of Ethanol to Produce Hydrogen: Modern and Efficient Catalyst Modification Strategies

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Hydrogen production by the steam reforming of ethanol over K-promoted Co/Al2O3–CaO xerogel catalysts

Cited by 21 publications

References 42 publications

Effect of Ca Promoter on the Structure, Performance, and Carbon Deposition of Ni-Al2O3 Catalyst for CO2-CH4 Reforming

Effect of Ca Promoter on the Structure, Performance, and Carbon Deposition of Ni-Al2O3 Catalyst for CO2-CH4 Reforming

Main Hydrogen Production Processes: An Overview

Catalytic Steam Reforming of Ethanol to Produce Hydrogen: Modern and Efficient Catalyst Modification Strategies

Contact Info

Product

Resources

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Effect of Ca Promoter on the Structure, Performance, and Carbon Deposition of Ni-Al₂O₃ Catalyst for CO₂-CH₄ Reforming

Effect of Ca Promoter on the Structure, Performance, and Carbon Deposition of Ni-Al₂O₃ Catalyst for CO₂-CH₄ Reforming