A highly active and stable Co4N/γ-Al2O3 catalyst for CO and CO2 methanation to produce synthetic natural gas (SNG)

Razzaq, Rauf; Li, Chunshan; Usman, Muhammad; Suzuki, Kenzi; Zhang, Suojiang

doi:10.1016/j.cej.2014.10.073

Cited by 122 publications

(56 citation statements)

References 45 publications

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“…It was reported that the activity of the Fe catalyst was greater than for Mo. According to experiments performed by Razzaq et al in a fixed bed quartz reactor, the most effective catalytic activity was shown by a Co‐Al 2 O 3 catalyst at a lower temperature range (200–250 °C) along with the formation of higher hydrocarbons. But, with the increase in temperature to 350 °C, CH 4 yield and the formation of other hydrocarbons was suppressed.…”

Section: Resultsmentioning

confidence: 97%

Parametric Study of CO₂ Methanation for Synthetic Natural Gas Production

2019

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The production of methane by carbon dioxide hydrogenation through optimization of the operating parameters to enhance methane yield and carbon dioxide conversion in a two‐stage fixed bed reactor is investigated. The influence of temperature, gas hourly space velocity (GHSV), and H2:CO2 ratio on the production of methane is studied. In addition, different methanation catalysts in terms of metal promoters and support materials are investigated to maximize methane production. The results show that the maximum methane yield and maximum carbon dioxide conversion are obtained at a catalyst temperature of 360 °C with a H2:CO2 ratio of 4:1 and total GHSV of 6000 mL h−1 g−1catalyst and reactant GHSV of 3000 mL h−1 g−1catalyst. The optimum metal‐alumina catalyst investigated for CO2 conversion and methane yield is the 10 wt%‐Ni‐Al2O3 catalyst. However, reduction in the methane yield is observed with the addition of Fe and Co promoters because of catalyst sintering and nonuniform dispersion of metals on the support. Among the different catalyst support materials studied, i.e., Al2O3, SiO2 and MCM‐41, the highest catalytic activity is shown by the Al2O3 catalyst with 83 mol% CO2 conversion, producing 81 mol% CH4 with 98% CH4 selectivity.

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Section: Resultsmentioning

confidence: 97%

Parametric Study of CO₂ Methanation for Synthetic Natural Gas Production

2019

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“…In some cases methanation of syngas containing both carbon oxides has been investigated with the aim of selectively hydrogenating CO [7,10,13,[17][18][19]. However, a still limited number of papers deal with catalytic co-methanation of carbon oxides [43][44][45][46][47][48][49][50][51][52].…”

Section: Introductionmentioning

confidence: 99%

CO and CO2 Co-Methanation on Ni/CeO2-ZrO2 Soft-Templated Catalysts

et al. 2019

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Supported nickel catalysts were synthesized, characterized, and employed in the carbon oxides co-methanation process. Five NiO/CeO2-ZrO2 mixed oxides, with the same Ni content and different Ce/Zr molar ratios, were prepared by the soft-template method. They were characterized through ICP-AES, N2 adsorption, XRD, and TPR. Reduced Ni/CeO2-ZrO2 catalysts were obtained by submitting the oxide systems to reduction treatment in H2 at 400 °C. They were characterized by XRD, H2-TPD, and CO2 adsorption microcalorimetry and their catalytic performances in the carbon oxides co-methanation were investigated. Catalytic tests were performed in a fixed-bed continuous-flow microreactor at atmospheric pressure. The effect of experimental conditions (reaction temperature, space velocity, reactants molar ratio) was also studied. Almost complete CO conversion was obtained on any catalyst, whereas CO2 conversion was much lower and increased with Ce content, at least up to Ce/Zr = 1. The beneficial effect of the Ce content could be related to the increased NiO reducibility and to the higher ability to adsorb and activate CO2. However, at high Ce/Zr ratios, it is probably counterbalanced by an interplay of reactions involving CO and CO2.

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“…The commonly used acid catalysts are vanadiumĲV) oxide, phosphorus pent oxide (P 2 O 5 ), niobium pent oxide, tungsten trioxide, zirconium dioxide (ZrO 2 ) and tantalum pent oxide 2-7 and the base catalysts often used are sodium (Na), potassium (K), cesium (Cs), strontium, lithium (Li) and magnesium (Mg) oxides or hydroxides on appropriate supports. [21][22][23][24][25][26] Yan et al 27 used an SBA-15 mesoporous molecular support impregnated with cesium oxide (Cs 2 O) to catalyze the reaction. Using solid vanadium dioxide pyrophosphate [V 2 O 2 (P 2 O 7 )] demonstrated a higher catalyst performance among the previously mentioned acid catalysts and was later improved to form V-Si-P by combining V 2 O 2 (P 2 O 7 ) with silica gel.…”

Section: Introductionmentioning

confidence: 99%

Catalysts, kinetics and process optimization for the synthesis of methyl acrylate over Cs–P/γ-Al₂O₃

Zhang

Yang

et al. 2016

Catal. Sci. Technol.

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Bifunctional catalysts Cs-P/γ-Al 2 O 3 were developed and firstly applied in a one-step synthesis of methyl acrylate using methyl acetate (Ma) and formaldehyde (FA). The catalysts were prepared using impregnation and characterized with X-ray diffraction, transmission electron microscopy, thermogravimetry and differential thermal analysis, nitrogen adsorption-desorption, ammonia-and carbon dioxide-temperature programmed desorption methods. The catalytic performance was evaluated using a fixed-bed microreactor. Experimental results indicated that the P loading had significant influence on the catalytic activity by modifying the acid-base surface properties of the catalyst. The process optimization using response surface methodology was performed and the interactions of operational variables including the Ma/FA molar ratio, reaction time and temperature were elucidated. Then the kinetics of the aldol condensation reaction was studied using a pseudo-homogeneous kinetic model. In addition, the lifetime of optimum Cs10%-P5%/γ-Al 2 O 3 catalyst was evaluated over a continuous period of 400 h, and did not exhibit an obvious decrease in efficiency.Catal. Sci. Technol. This journal is

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A highly active and stable Co4N/γ-Al2O3 catalyst for CO and CO2 methanation to produce synthetic natural gas (SNG)

Cited by 122 publications

References 45 publications

Parametric Study of CO₂ Methanation for Synthetic Natural Gas Production

Parametric Study of CO₂ Methanation for Synthetic Natural Gas Production

CO and CO2 Co-Methanation on Ni/CeO2-ZrO2 Soft-Templated Catalysts

Catalysts, kinetics and process optimization for the synthesis of methyl acrylate over Cs–P/γ-Al₂O₃

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A highly active and stable Co4N/γ-Al2O3 catalyst for CO and CO2 methanation to produce synthetic natural gas (SNG)

Cited by 122 publications

References 45 publications

Parametric Study of CO2 Methanation for Synthetic Natural Gas Production

Parametric Study of CO2 Methanation for Synthetic Natural Gas Production

CO and CO2 Co-Methanation on Ni/CeO2-ZrO2 Soft-Templated Catalysts

Catalysts, kinetics and process optimization for the synthesis of methyl acrylate over Cs–P/γ-Al2O3

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Product

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About

Parametric Study of CO₂ Methanation for Synthetic Natural Gas Production

Parametric Study of CO₂ Methanation for Synthetic Natural Gas Production

Catalysts, kinetics and process optimization for the synthesis of methyl acrylate over Cs–P/γ-Al₂O₃