CO2 reforming of CH4 over ceria-supported metal catalysts

Asami, Kōji; Li, Xiaohong; Fujimoto, Kaoru; Koyama, Yusaku; Sakurama, Akinori; Kometani, Noritsugu; Yonezawa, Yoshiro

doi:10.1016/s0920-5861(03)00297-9

Cited by 63 publications

(31 citation statements)

References 11 publications

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“…LaNi (1)x) Fe x O 3 systems, after the dry reforming of methane reaction were shown to contain metallic Ni, LaFeO 3 and La 2 O 3 [21]. Hence, another possible explanation for the good stability of this system is that the presence of LaFeO 3 and lanthanum oxide in the reaction atmosphere can give an oxidizing character to the neighbourhood of the nickel particles and so contribute to the destabilization of the carbonaceous species on the active nickel sites.…”

Section: Catalytic Activity Measurementsmentioning

confidence: 99%

“…The classical GTL route encloses both the synthesis gas generation from natural gas (methane) and the synthesis gas conversion to liquid fuels [1]. In these processes, the synthesis gas production section is considered to account for around 60% of the total capital cost [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…However, particularly for LaNiO 3 , the thermal stability of the perovskite is low under a reducing atmosphere and coke formation can still be important [16]. A study of LaNi (1)x) Fe x O 3 catalysts to obtain synthesis gas has shown that the addition of iron to the perovskite structure can stabilize the structure under test conditions and limit the mobility of the active nickel [17]. With the aim of stabilizing the perovskite structure under a reducing atmosphere and to test its efficiency in the CO 2 reforming of methane to produce of synthesis gas to the GTL process, the influence of preparation conditions and of the partial substitution of Ni by Fe in the LaNi (1)x) Fe x O 3 structure were investigated in this study.…”

Section: Introductionmentioning

confidence: 99%

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Ni–Fe Catalysts Based on Perovskite-type Oxides for Dry Reforming of Methane to Syngas

Lima

Assaf

2006

Catal Lett

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LaNi (1)x) Fe x O 3 (x=0, 0.2, 0.4 and 0.7) perovskite-type catalysts were modified by the partial substitution of nickel by iron, aiming to increase the stability and resistance to carbon deposition during the methane dry reforming reaction. The results showed that a suitable combination of precipitation and calcination steps could result in oxides with the desired structure and with improved properties from the point of view of heterogeneous catalysis. The partial substitution of Ni by Fe in the perovskite structure resulted in decreasing rates of conversion of both reactants. However, the stability of the catalyst during the reaction was highly increased. These substituted catalysts were shown to be stable and the LaNi 0.8 Fe 0.2 O 3 catalyst, calcined at 800°C for 5 h, was the most active in the reaction conditions.

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Section: Catalytic Activity Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ni–Fe Catalysts Based on Perovskite-type Oxides for Dry Reforming of Methane to Syngas

Lima

Assaf

2006

Catal Lett

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“…CO 2 ) emission. The production of syngas (CO and H 2 ) by CO 2 reforming of methane (CH 4 + CO 2 = 2 H 2 + 2 CO) over a heterogeneous catalyst is one of the routes for the utilization methane and CO 2 resources [1][2][3][4][5][6][7][8][9][10][11]. The product mixture of this reaction from a stoichiometric (1:1) feed has, in comparison with steam reforming and partial oxidation, a low H 2 /CO ratio (1:1) that is preferable for Fischer-Tropsch synthesis because high H 2 /CO ratios favor methanation and suppress chain growth [10].…”

Section: Introductionmentioning

confidence: 99%

Comparative study of atmospheric and high pressure CO2 reforming of methane over Ni/MgO-AN catalyst

Yuhe

2005

Catal Lett

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Catalytic activity of Ni/MgO-AN prepared from alcogel derived MgO was studied for the dry reforming of methane under atmospheric as well as high pressure (1.5 MPa). Different catalytic performances are observed in the atmospheric and high-pressure reactions; while the catalyst was highly active and extremely stable under atmospheric pressure it shows a self-stabilization process under high pressure. The self-stabilization process was characterized initially by a decrease in deactivation rate with increasing the reaction time-on-stream (TOS) up to ca. 12 h and then by a thereafter stabilization during the reaction. Characterizations of the coked catalyst with TPO, TEM, SEM, TPH and XRD techniques detected very little carbon deposits (ca. 0.2 wt% of the catalyst charge) on the used catalyst under atmospheric pressure. In contrast, large amount of whisker carbon deposit (ca. 100 wt% of the catalyst charge) were formed on the used catalyst under high pressure. In the high-pressure reaction, the activity decline during the initial stage was closely related to the amount of carbon deposits on the catalyst, which also became stabilized after the catalyst had served the reaction for ca. 12 h. The carbon deposits on the used catalyst in the high-pressure reaction contained two different components (a-carbon and b-carbon) while the carbon deposits in the atmospheric pressure reaction were in the form of a-carbon. No notable sintering of metallic nickel was detected by XRD on the used catalyst in the reaction under atmospheric pressure whereas unavoidable sintering of metallic Ni particles happened within the very first hours of the high-pressure reaction.

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“…Besides, other conventional metal-based catalysts have been evaluated. Regarding Fe catalysts, they show poorer activity and selectivity [3]. However, substitution of Ni by low contents of Fe (i.e.…”

Section: Ch4 + Co2 ↔ 2h2 + 2co (1)mentioning

confidence: 99%

Mixtures of Steel-Making Slag and Carbons as Catalyst for Microwave-Assisted Dry Reforming of CH4

Bermúdez

Fidalgo

Arenillas

et al. 2012

Chinese Journal of Catalysis

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The use of steel-making slag as catalysts for microwave-assisted dry reforming of CH4 was studied. Carbon materials (an activated carbon and a metallurgical coke), mixtures of carbon materials + Fe-rich slag and mixtures of carbon materials + Ni/Al2O3 were tested as catalysts. Mixtures of slag with carbons gave rise to higher and steadier conversions than those achieved over carbon materials. The case of mixtures with metallurgical coke was remarkably, changing from no conversion when coke was used alone to high values when it was mixed with metal-rich catalysts.

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CO2 reforming of CH4 over ceria-supported metal catalysts

Cited by 63 publications

References 11 publications

Ni–Fe Catalysts Based on Perovskite-type Oxides for Dry Reforming of Methane to Syngas

Ni–Fe Catalysts Based on Perovskite-type Oxides for Dry Reforming of Methane to Syngas

Comparative study of atmospheric and high pressure CO2 reforming of methane over Ni/MgO-AN catalyst

Mixtures of Steel-Making Slag and Carbons as Catalyst for Microwave-Assisted Dry Reforming of CH4

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