Selective methanation of CO in hydrogen-rich gases involving large amounts of CO2 over Ru-modified Ni-Al mixed oxide catalysts

Kimura, Masae; Miyao, Toshihiro; Komori, Shingo; Chen, Aihua; Higashiyama, Kazutoshi; Yamashita, Hisao; Watanabe, Masahiro

doi:10.1016/j.apcata.2010.03.021

Cited by 69 publications

(38 citation statements)

References 17 publications

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“…A satisfactory methanation catalyst should be excellent, coking-resistant, and possess high thermal stability at high temperature and pressure [6][7][8]. The target of this work is to develop a nickel-based catalyst.…”

Section: Introductionmentioning

confidence: 99%

Effect of reaction variables on CO methanation process over NiO–La2O3–MgO/Al2O3 catalyst for coal to synthetic natural gas

Wang

Gao

et al. 2015

Appl Petrochem Res

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Reaction variables for methanation process were investigated using self-independently developed NiO-La 2 O 3 -MgO/Al 2 O 3 catalyst in a big lab scale reactor. The effects of reaction parameters, such as temperature, pressure, H 2 /CO flow ratio and space velocity on the activity of methanation catalyst were studied. 100 % CO conversion and 95 % of selectivity of methane can be achieved at 400°C and 3 MPa with the feed ratio of H 2 / CO as 3.25:1 and space velocity of 12,000 h -1 .The optimization reaction parameters were suggested on the basis of this work for the further development and commercialization of methanation catalyst.

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Section: Introductionmentioning

confidence: 99%

Effect of reaction variables on CO methanation process over NiO–La2O3–MgO/Al2O3 catalyst for coal to synthetic natural gas

Wang

Gao

et al. 2015

Appl Petrochem Res

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“…In 2009, a 1 kW-class residential PEFC system (ENE·FARM ® ) was the first such system to be commercialized in Japan, and the total number of systems installed had exceeded 150,000 by the end of 2015. In the fuel processing system (FPS) for such a residential PEFC, hydrogen-rich gas (reformate) is produced by steam-reforming of raw hydrocarbon fuels (CH 4 or C 3 H 8 ), followed by the water-gas-shift reaction to reduce the concentration of CO to a level of several thousand ppm. The CO concentration in the reformate must be reduced further, down to ≤10 ppm, by the preferential oxidation (PROX) of CO.…”

Section: Introductionmentioning

confidence: 99%

“…It is quite essential to develop potential anode catalysts with higher CO tolerance, which would make it possible to simplify the FPS and, thus, reduce the cost. For example, if the PROX unit were excluded or replaced with one for the selective methanation of CO, a complicated sub-system (air supply, cooling system, mixer for fuel and air) could be removed from the FPS [4].…”

Section: Introductionmentioning

confidence: 99%

Effect of an Sb-Doped SnO2 Support on the CO-Tolerance of Pt2Ru3 Nanocatalysts for Residential Fuel Cells

et al. 2016

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Abstract:We prepared monodisperse Pt 2 Ru 3 nanoparticles supported on carbon black and Sb-doped SnO 2 (denoted as Pt 2 Ru 3 /CB and Pt 2 Ru 3 /Sb-SnO 2 ) with identical alloy composition and particle size distribution by the nanocapsule method. The activities for the hydrogen oxidation reaction (HOR) of these anode catalysts were examined in H 2 -saturated 0.1 M HClO 4 solution in both the presence and absence of carbon monoxide by use of a channel flow electrode at 70 • C. It was found that the CO-tolerant HOR mass activity at 0.02 V versus a reversible hydrogen electrode (RHE) on the Pt 2 Ru 3 /Sb-SnO 2 electrode was higher than that at the Pt 2 Ru 3 /CB electrode in 0.1 M HClO 4 solution saturated with 1000 ppm CO (H 2 -balance). The CO tolerance mechanism of these catalysts was investigated by in situ attenuated total reflection Fourier transform infrared reflection-adsorption spectroscopy (ATR-FTIRAS) in 1% CO/H 2 -saturated 0.1 M HClO 4 solution at 60 • C. It was found, for the Pt 2 Ru 3 /Sb-SnO 2 catalyst, that the band intensity of CO linearly adsorbed (CO L ) at step/edge sites was suppressed, together with a blueshift of the CO L peak at terrace sites. On this surface, the HOR active sites were concluded to be more available than those on the CB-supported catalyst surface. The observed changes in the adsorption states of CO can be ascribed to an electronic modification effect by the Sb-SnO 2 support.

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“…The mixture was stirred for 12 h under ambient conditions and the resultant solid material was separated by filtration and washed with distilled water. The solid material was put into a certain volume of water (20 cm 3 ), of which the pH was 7.34, and the slurry obtained was put into a stainless steel autoclave (100 cm 3 ). After a heat treatment at 150 ºC for 2 h, the solid material produced was separated by filtration and washed with distilled water, dried at 80 ºC overnight, and calcined at 300 ºC for 1 h. Platinum was loaded to the nickel-containing smectite material prepared: an aqueous solution of H2PtCl6·H2O (Wako) was impregnated at 70 ºC under reduced pressure and the material obtained was dried at 110 ºC overnight and calcined at 300 ºC for 3 h. The nickel-containing smectite sample will be abbreviated as SM(Ni) in the following.…”

Section: Catalyst Preparationmentioning

confidence: 99%

“…After the review of Park et al [1] in 2009, several authors further investigated the selective methanation of CO in H2-rich gases using Ru [2][3][4][5] and Ni [3] catalysts. Kimura et al prepared Ru/NiAlxOy catalysts by spray plasma and reported their good performance [3]. The content CO was reduced to 13 ppm from 1% CO (H2 79%, CO2 20% (dry basis), H2O/CO = 15) over 3% Ru/NiAlxOy at 230 ºC.…”

Section: Introductionmentioning

confidence: 99%

Selective methanation of CO in H 2 -rich gas stream by synthetic nickel-containing smectite based catalysts

Yoshida¹,

Watanabe²,

Iwasa³

et al. 2015

Applied Catalysis B: Environmental

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The selective methanation of CO in a H2-rich gas stream has been investigated with nickel catalysts including synthetic nickel-containing smectite (SM(Ni)) catalysts undoped and doped with platinum in small quantities and conventional nickel catalysts on SiO2, Al2O3, ZrO2, and MgO. The nickel content in SM(Ni) and the nickel loading in the other catalysts were the same, being 35 wt.-%. The CO conversion with SM(Ni) was smaller than those with the conventional supported nickel catalysts at temperatures of 150 ºC -300 ºC. However, the former showed the higher selectivity to the methanation of CO of > 95% at 250 ºC or below compared to the latter catalysts. The low activity of SM(Ni) was ascribed to a small area of exposed nickel species. The area of exposed nickel species was improved by doping a reduction promoter of platinum to SM(Ni), resulting in an increase in the activity while keeping the high selectivity to the CO methanation. The influence of reduction temperature and platinum loading on the activity and selectivity was investigated.

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Selective methanation of CO in hydrogen-rich gases involving large amounts of CO2 over Ru-modified Ni-Al mixed oxide catalysts

Cited by 69 publications

References 17 publications

Effect of reaction variables on CO methanation process over NiO–La2O3–MgO/Al2O3 catalyst for coal to synthetic natural gas

Effect of reaction variables on CO methanation process over NiO–La2O3–MgO/Al2O3 catalyst for coal to synthetic natural gas

Effect of an Sb-Doped SnO2 Support on the CO-Tolerance of Pt2Ru3 Nanocatalysts for Residential Fuel Cells

Selective methanation of CO in H 2 -rich gas stream by synthetic nickel-containing smectite based catalysts

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