Reaction and characterization studies of an industrial Cr-free iron-based catalyst for high-temperature water gas shift reaction

Liu, Quansheng; Ma, Wanhong; He, Rong; Zhan-jun, MU

doi:10.1016/j.cattod.2005.07.150

Cited by 51 publications

(22 citation statements)

References 21 publications

(35 reference statements)

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“…Moreover, it has been known that chromium in the iron-chromium catalysts include Cr 6? , which is toxic to humans and the environment [11]. Therefore, recent studies of HTS catalysts have been categorized into two groups [12].…”

Section: Introductionmentioning

confidence: 99%

Effect of Loading Potassium and Palladium over Iron-Based Catalyst for Low Temperature Water–Gas Shift Reaction

et al. 2010

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We investigated the effect of loading potassium over iron-based catalysts for water-gas shift (WGS) reaction at 573 K. The iron-based water-gas shift catalyst has been known as a redox-mechanism catalyst. Therefore, to promote the redox reaction over iron oxide, we impregnated a small amount of Pd on various iron oxides. Results revealed that coexisting potassium and palladium accelerated the WGS reaction over iron-oxide catalyst. We examined the optimum amount of potassium over Pd/iron catalyst, and we found that the optimum molar ratio was about 2 (K/Pd molar ratio). From the viewpoint of reducibility of the catalyst, the addition of small amount of Pd onto iron oxide promotes reduction from Fe 2 O 3 to Fe 3 O 4 . However, impregnation of potassium on iron oxide makes the catalyst structure robust. The promotion effect of Pd and potassium was not observed on SiO 2 support. We therefore concluded that the synergetic effect among Pd, K, and iron oxide, was important for the WGS reaction.

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Section: Introductionmentioning

confidence: 99%

Effect of Loading Potassium and Palladium over Iron-Based Catalyst for Low Temperature Water–Gas Shift Reaction

et al. 2010

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“…So, for many applications, the protection of the naked magnetic particle, including grafting or coating with new organic or inorganic layers, is crucial, [2] and permits their further functionalization. [3] Among the different magnetic nanoparticles, Fe 3 O 4 is the most important one, and although naked magnetite seems to play a capital role in pre-biotic chemistry, [4] its use as a catalyst has been quite limited to only a few examples, including carbon-carbon double bond isomerization, [5] modified FischerTropsch reaction, [6] water-gas shift reaction, [7] dehydrogenation [8] and epoxidation [9] processes, many of them performed under very extreme reaction conditions.…”

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confidence: 99%

Unmodified Nano‐Powder Magnetite Catalyzes a Four‐ Component Aza‐Sakurai Reaction

2008

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A new catalyst for an old material: magnetite is an excellent Lewis acid catalyst for the four-component aza-Sakurai reaction. The process could be repeated up to 15-times without losing effectiveness, with the catalyst recycling being as easy as the use of a simple magnet. The catalyst is selective and could discriminate between aldehyde and ketone functionalities, catalyzing first the reaction with the higher electrophilic aldehyde.

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“…1 For example, potential promotional roles of Co, Bu, Ag, Ba, Ce for Fe-Cr-O catalysts were examined. [2][3][4][5][6][7][8][9][10] Fe-Cu-Al-O catalysts 2,3,9 reported recently exhibit a comparable catalytic performance to Fe-Cr-O and other Fe-based catalysts. 8 Cu is considered as a promoter for the high temperature WGS catalysts, Fe-Cu-Al-O.…”

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confidence: 99%

The role of copper in catalytic performance of a Fe–Cu–Al–O catalyst for water gas shift reaction

Wang

Zhang

et al. 2013

Chem. Commun.

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A Fe-Cu-Al-O water gas shift catalyst with a Fe : Cu atomic ratio of 4 : 1 upon pretreatment at 350 8C in H 2 exhibits a conversion higher than a physical mixture of Fe-Al-O and Cu-Al-O by B40% over a temperature range of 300 8C-450 8C. In situ ambient pressure X-ray photoelectron spectroscopy studies suggest that the surface region of Fe-Cu-Al-O was restructured into a double-layer structure consisting of a surface layer of

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Reaction and characterization studies of an industrial Cr-free iron-based catalyst for high-temperature water gas shift reaction

Cited by 51 publications

References 21 publications

Effect of Loading Potassium and Palladium over Iron-Based Catalyst for Low Temperature Water–Gas Shift Reaction

Effect of Loading Potassium and Palladium over Iron-Based Catalyst for Low Temperature Water–Gas Shift Reaction

Unmodified Nano‐Powder Magnetite Catalyzes a Four‐ Component Aza‐Sakurai Reaction

The role of copper in catalytic performance of a Fe–Cu–Al–O catalyst for water gas shift reaction

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