Effect of Copper as a Dopant on the Water Gas Shift Activity of Fe/Ce and Fe/Cr Modified Ferrites

Reddy, Gunugunuri K.; Smirniotis, Panagiotis G.

doi:10.1007/s10562-010-0465-2

Cited by 26 publications

(27 citation statements)

References 15 publications

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“…The bands corresponding to the CeO 2 and rutile phases were found in the XRD pattern. It is known that FeO is an inactive phase for the WGS reaction . Consequently, the formation of FeO over the activation sites could limit the WGS reaction.…”

Section: Resultsmentioning

confidence: 57%

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Ethanol Steam Reforming Followed by Water‐Gas Shift Reaction over Ce‐Ni/MCM‐41 and Fe‐Based Catalysts

Rahmanzadeh

Taghizadeh

2019

Chem Eng & Technol

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Current research focuses on hydrogen production from ethanol steam reforming (ESR) followed by water-gas shift (WGS) reaction. Ce-Ni/MCM-41 and Fe/Ce/M (where M = K, La, Ti) catalysts were prepared by the wet-impregnation technique and used for the ESR and WGS reactions, respectively. All experiments were carried out at 600°C. The effects of the reduction time, the ratio of the two catalysts, and their arrangement were also investigated. The best results were obtained using Fe/Ce/Ti as WGS catalyst and with a separate array because the H 2 production and CO 2 level in the product gas were improved while that of CO was reduced. To generate high-purity hydrogen, the CaO-based adsorbent was used as a third layer to adsorb CO 2 from the gaseous products.

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Section: Resultsmentioning

confidence: 57%

“…In the case of the reduced Fe/Ce/Ti catalyst, the diffraction lines are strong at 35.5, 43.11, 47.6, 53.51, 57, 62.58, and 72.57°. These correspond to the Fe 3 O 4 (magnetite) inverse cubic spinel phase (PDF‐ICDD 26‐1136) , . On the other hand, the catalyst shows a few extra diffraction bands at 2 θ = 36, 41, 60, and 76°.…”

Section: Resultsmentioning

confidence: 99%

Ethanol Steam Reforming Followed by Water‐Gas Shift Reaction over Ce‐Ni/MCM‐41 and Fe‐Based Catalysts

Rahmanzadeh

Taghizadeh

2019

Chem Eng & Technol

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“…Then we incorporated Cu into the Fe/M catalysts (M ¼ Cr, Mn, Co, Ni, Cu, Zn and Ce) since Cu is a promoter for the Fe/Cr catalysts for the high-temperature WGS reaction in the industries [3][4][5]. Interestingly, Cu acts as a promoter for all the modified ferrite catalysts except Fe/Ce catalyst.…”

Section: Role Of Cumentioning

confidence: 99%

Ultra High Temperature WGS Reaction

Reddy

Smirniotis²

2015

Water Gas Shift Reaction

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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%

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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Effect of Copper as a Dopant on the Water Gas Shift Activity of Fe/Ce and Fe/Cr Modified Ferrites

Abstract: The role of copper as a dopant on the WGS activity of Fe/Cr and Fe/Ce catalysts has been investigated. Our catalysts were synthesized via simultaneous precipitation of substituent metal cation/s (Cu 2? /M n?

Cited by 26 publications

References 15 publications

Ethanol Steam Reforming Followed by Water‐Gas Shift Reaction over Ce‐Ni/MCM‐41 and Fe‐Based Catalysts

Ethanol Steam Reforming Followed by Water‐Gas Shift Reaction over Ce‐Ni/MCM‐41 and Fe‐Based Catalysts

Ultra High Temperature WGS Reaction

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

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