The effect of preparation method on Fe/Al/Cu oxide-based catalyst performance for high temperature water gas shift reaction using simulated waste-derived synthesis gas

Na, Hyun Suk; Jeong, Dae-Woon; Jang, Won-Jun; Shim, Jae Oh

doi:10.1016/j.ijhydene.2015.07.060

Cited by 43 publications

(7 citation statements)

References 32 publications

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“…Such improved performance was attributed to better dispersed Cu and more oxygen vacancies which facilitate the redox cycle of HT-WGS reaction. However, Na et al 168 investigated impregnated, sol−gel prepared and coprecipitated Fe/Al/Cu catalysts, and found that the coprecipitated catalyst was stable, possesses a high surface area and highly active for HT-WGS. Jeong et al 169 prepared Fe−Al−Cu catalysts with varying Fe/Cu ratio and fixed Al content, and the catalysts were found to exhibit higher and more stable activity compared to commercial catalysts.…”

Section: Promotion Of Iron Oxide Catalystsmentioning

confidence: 99%

Iron-Based Catalysts for the High-Temperature Water–Gas Shift (HT-WGS) Reaction: A Review

2015

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This article critically reviews the literature on iron-based catalysts for the high-temperature water–gas shift (HT-WGS) reaction. The reaction mechanism, reaction intermediates, rate-determining step, kinetics, active site, and promoters are covered. Unlike the low-temperature water–gas shift (LT-WGS) reaction by Cu/ZnO catalysts that has received intensive analysis with modern in situ and operando spectroscopy and DFT studies, the corresponding HT-WGS reaction by Fe-based catalysts still lacks a fundamental understanding because of the absence of modern catalysis studies of this important catalytic system. Given the role of the WGS catalysts on production of H2 for a hydrogen economy, it is imperative that the fundamental molecular-level understanding of the HT-WGS catalyst be advanced.

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Section: Promotion Of Iron Oxide Catalystsmentioning

confidence: 99%

Iron-Based Catalysts for the High-Temperature Water–Gas Shift (HT-WGS) Reaction: A Review

2015

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“…Many chemical industries and the fuel cell industry utilize hydrogen to provide a pollution-free combustion and high energy density [ 1 , 2 , 3 ]. Hydrogen is a promising fuel for mobile and residential fuel cells.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of hydrogen production using Ni catalysts supported by Gd-doped ceria

Tojira¹,

Lomonaco²,

Sesuk³

et al. 2021

Heliyon

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A redox cycle between Ce 4þ and Ce 3þ is an elementary step in water gas shift (WGS) mechanism. By facilitating the redox cycle between þ4 and þ3 of cerium, a formation of oxygen vacancy can be enhanced. It is considered to be a dominating factor in developing the WGS performance and the stability of ceria in this work. We have facilitated the redox cycle in CeO 2 to enrich the WGS activity. The WGS reaction was carried out on Ni catalyst supported by Gd-doped ceria (GDC) from Daiichi. Ni and Re were added onto GDC by impregnation method to examine the role of Re addition on surface, structural and reducibility, which affected upon their catalytic activities. Rhenium has an influence on increasing the water gas shift performance of Ni/GDC catalysts because it facilitates the redox process at the surface of ceria, disperses Ni particles and enhances oxygen vacancy formation. The results indicate that the water gas shift activity of 1%Re4%Ni/GDC is higher than that of 5%Ni/GDC. The dispersion of active site on the surface of catalyst results in an increase of CO molecule adsorption and acceleration of the redox cycle between Ce 4þ and Ce 3þ of ceria support via oxygen vacancy generation. Therefore, using a combination of these two effects can enhance the WGS performance.

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“…The HT-WGS process is currently carried out on Fe-Cr-Cu catalysts. A typical HT-WGS catalyst consists of: Fe 2 O 3 (80-95 wt.-%), Cr 2 O 3 (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15) wt.-%) and CuO (1-5 wt.-%). [1] HT-WGS catalysts based on this formula are little sensitive to chemical poisons and the main cause of their slow deactivation is the thermal sintering.…”

Section: Introductionmentioning

confidence: 99%

“…[2][3][4] Attempts to substitute chromium (partially or entirely) with non-toxic elements like Ga, Mn, V, Ca, Zr, La and to develop "Cr-free Fe-based catalysts" have been undertaken. [5][6][7][8][9][10] Chances for addressing this problem are seen mainly in modification of the conventional FeO x -based catalysts by substitution of chromium oxide with alumina [11][12][13] or cerium, [14,15] vanadium, [5] molybdenum [16] oxides or the application of other catalyst with different formula e.g. alkali-promoted catalysts.…”

Section: Introductionmentioning

confidence: 99%

Quaternary Fe‐Cu‐Cr‐Al HT‐WGS Catalysts – Effect of Al Substitution on the Efficiency at Steam‐Lean Process Gas

et al. 2020

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In the present work, we report on Fe–Cu–Cr–Al systems with various Cr/Al substitution as catalysts for high‐temperature water‐gas shift (HT‐WGS) to evaluate the possibility of Cr elimination and usability for carrying out the HT‐WGS process at steam‐lean process gas. The set of Fe–Cu–Cr–Al catalysts with the same Fe/Cu molar ratio and different Cr/Al molar ratio (0/∞) were prepared by the precursors' co‐precipitation and thermal treatment. The catalysts were investigated by XRF, DTG/MS, XRD, N2 sorption, H2‐TPR methods and activity tests. A relationship between Cr/Al ratio and physicochemical parameters and HT‐WGS activity, selectivity and stability of the catalysts have been estimated. Experimental results demonstrated that complete elimination of Cr from the Fe–Cu–Cr–Al catalyst is unfavorable, and it would lead to negative consequences as Cr enhances the catalyst activity and improve its durability.

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The effect of preparation method on Fe/Al/Cu oxide-based catalyst performance for high temperature water gas shift reaction using simulated waste-derived synthesis gas

Cited by 43 publications

References 32 publications

Iron-Based Catalysts for the High-Temperature Water–Gas Shift (HT-WGS) Reaction: A Review

Iron-Based Catalysts for the High-Temperature Water–Gas Shift (HT-WGS) Reaction: A Review

Enhancement of hydrogen production using Ni catalysts supported by Gd-doped ceria

Quaternary Fe‐Cu‐Cr‐Al HT‐WGS Catalysts – Effect of Al Substitution on the Efficiency at Steam‐Lean Process Gas

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