Performance of Ni/CeO2 catalysts for selective CO methanation in hydrogen-rich gas

Zyryanova, M. M.; Snytnikov, P.V.; Gulyaev, R. V.; Amosov, Yu. I.; Boronin, A. I.; Sobyanin, V. A.

doi:10.1016/j.cej.2013.07.034

Cited by 86 publications

(34 citation statements)

References 21 publications

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“…This Cl component suppressed unfavorable CO2 methanation via the RWGS 7), 21) . This phenomenon has been reported by other groups as well 10) ,22) 26) . Many studies have investigated the activity and selectivity of CO methanation over Cl-modified catalysts, but little is known about the cause of catalyst deterioration.…”

Section: Introductionsupporting

confidence: 65%

Degradation Factors of Ni/TiO<sub>2</sub> Catalysts for Selective CO Methanation: Effect of Loss of Residual Cl on Catalyst

Tada

Yanagita

Shimoda

et al. 2018

J. Jpn. Petrol. Inst.

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Accelerated deterioration tests for selective CO methanation over Ni/TiO2 catalysts were performed to investigate the catalyst degradation factors. The accelerated deterioration test treated the catalyst in the reaction gas flow at the specified temperature (200, 250 or 300 ) for 24 h. After the accelerated deterioration test, the Ni/TiO2 selectivity in CO methanation was reduced due to the enhancement of an undesirable reverse water-gas shift reaction. Powder X-ray diffraction found no change in the TiO2 structure between the fresh and spent catalysts. In-situ X-ray absorption spectroscopy demonstrated that the Ni species reduced by H2 were present as metallic Ni and remained unchanged in the fresh and spent catalysts. The number of surface Cl species for the spent catalyst was much smaller than that for the fresh catalyst. Therefore, disappearance of surface Cl components during the accelerated deterioration test caused the degradation of Ni/TiO2 catalysts for selective CO methanation.

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Section: Introductionsupporting

confidence: 65%

Degradation Factors of Ni/TiO<sub>2</sub> Catalysts for Selective CO Methanation: Effect of Loss of Residual Cl on Catalyst

Tada

Yanagita

Shimoda

et al. 2018

J. Jpn. Petrol. Inst.

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“…Djinović [69], Miyao [21,22], and Zyryanove [70] have studied on the chlorine effect over Ru/ Table 3. After the activity test, anatase and rutile phases of TiO 2 and metallic Ni phase were observed in all the spent catalysts, giving close agreement with the results of the spent Ni(0:10)/TiO 2 -500, -water, and -as catalysts shown in Fig.…”

Section: 2 Effect Of Chlorine Content In Ni/tio 2 Catalystmentioning

confidence: 99%

“…Consequently, we have revealed that the Ni/TiO 2 prepared from Ni nitrates exhibited high activity and high selectivity, but the one prepared from Ni chlorides exhibited much higher reaction selectivity of CO/CO 2 although its activity of CO methanation was slightly inferior [64]. in high CO/CO 2 selectivity possibly because the catalytic activity for the methanation of CO and CO 2 is modified in a different manner by the presence of the chlorine species [70].…”

Section: Introductionmentioning

confidence: 97%

Role of trace chlorine in Ni/TiO2 catalyst for CO selective methanation in reformate gas

Shimoda

Shoji

Tani

et al. 2015

Applied Catalysis B: Environmental

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“…The peak at ca. 854 eV is usually assigned to NiO, whereas the higher BE peak at 855-856 eV to Ni bonded with OH groups, i.e., Ni(OH) 2 and/or NiOOH [63,64]. It should be noted, however, the difficulty of unambiguously assigning the different chemical states of Ni oxides due to the complexity of Ni 2p spectra arising from multiplet splitting, shake-up satellites, and plasmon loss structures [65].…”

Section: Surface Characterization (Xps Analysis)mentioning

confidence: 99%

Hydrogen Production by Ethanol Steam Reforming (ESR) over CeO2 Supported Transition Metal (Fe, Co, Ni, Cu) Catalysts: Insight into the Structure-Activity Relationship

et al. 2016

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Abstract:The aim of the present work was to investigate steam reforming of ethanol with regard to H 2 production over transition metal catalysts supported on CeO 2 . Various parameters concerning the effect of temperature (400-800˝C), steam-to-carbon (S/C) feed ratio (0.5, 1.5, 3, 6), metal entity (Fe, Co, Ni, Cu) and metal loading (15-30 wt.%) on the catalytic performance, were thoroughly studied. The optimal performance was obtained for the 20 wt.% Co/CeO 2 catalyst, achieving a H 2 yield of up to 66% at 400˝C. In addition, the Co/CeO 2 catalyst demonstrated excellent stability performance in the whole examined temperature range of 400-800˝C. In contrast, a notable stability degradation, especially at low temperatures, was observed for Ni-, Cu-, and Fe-based catalysts, ascribed mainly to carbon deposition. An extensive characterization study, involving N 2 adsorption-desorption (BET), X-ray diffraction (XRD), Scanning Electron Microscopy (SEM/EDS), X-ray Photoelectron Spectroscopy (XPS), and Temperature Programmed Reduction (H 2 -TPR) was undertaken to gain insight into the structure-activity correlation. The excellent reforming performance of Co/CeO 2 catalysts could be attributed to their intrinsic reactivity towards ethanol reforming in combination to their high surface oxygen concentration, which hinders the deposition of carbonaceous species.

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Performance of Ni/CeO2 catalysts for selective CO methanation in hydrogen-rich gas

Cited by 86 publications

References 21 publications

Degradation Factors of Ni/TiO<sub>2</sub> Catalysts for Selective CO Methanation: Effect of Loss of Residual Cl on Catalyst

Degradation Factors of Ni/TiO<sub>2</sub> Catalysts for Selective CO Methanation: Effect of Loss of Residual Cl on Catalyst

Role of trace chlorine in Ni/TiO2 catalyst for CO selective methanation in reformate gas

Hydrogen Production by Ethanol Steam Reforming (ESR) over CeO2 Supported Transition Metal (Fe, Co, Ni, Cu) Catalysts: Insight into the Structure-Activity Relationship

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