Activated carbon supported Ni–Ca: Influence of reaction parameters on activity and stability of catalyst on methane reformation

Díaz, Karina; García, Víctor Jiménez; Matos, Juan

doi:10.1016/j.fuel.2006.05.011

Cited by 50 publications

(31 citation statements)

References 22 publications

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“…It was also reported [11] that *Address correspondence to this author at the Engineering of Materials and Nanotechnology Centre, Venezuelan Institute for Scientific Research, I.V.I.C., 20632, Caracas 1020-A, Venezuela; Tel/Fax: +58-212-5041922; E-mail: jmatos@ivic.gob.ve NiCa/AC catalyst pre-treated under helium flow at temperatures from 550 up to 800ºC showed higher methane conversions than those obtained after pre-treatment under H 2 flow. However, contrary to our preliminary work [11], Chen and co-workers [7] reported that in absence of carbon dioxide or steam an activated carbon-supported nickel-based catalyst was deactivated by Ni 3 C formed during methane decomposition. Li and co-workers [12] found that the catalytic activity of pure Ni catalyst for methane decomposition was related to the crystalline size of reduced Ni.…”

Section: Introductionmentioning

confidence: 72%

“…Ni(5wt%)-Ca(1wt%) catalyst was prepared by incipient wetness impregnation with nickel and calcium nitrate solutions on a commercial activated carbon (AC) purchased from Merck [Langmuir surface area 907m 2 g -1 , 22Å mean pore width, ash content <1wt%] following the procedure described in previous works [10,11]. Impregnation order is given by the sequence of elements, i.e., Ni followed by Ca.…”

Section: Methodsmentioning

confidence: 99%

“…(3A, B) present the Gaussian analysis of carbon main peak after He pre-treatment at 650ºC by 1h and after 90min reaction, respectively. After helium pretreatment, besides a signal about 286.4eV attributed to cyclic ether groups (-C-O-C-) on the surface of activated carbons [11], another signal about 283.9eV was also detected (Fig. 3A).…”

Section: Methane Conversion and Xps Analysismentioning

confidence: 99%

“…However, activated carbon is not a common catalytic support for methane reforming reactions [10] because it can suffer gasification by steam or by CO 2 . Both reactions are spontaneous at about 700ºC but in a preliminary study of dry methane reforming on a carbon-supported Ni-Ca catalyst [11] we showed CO 2 can help control excess of carbon deposits without any detrimental effect on carbon supports after 5h reaction at 650ºC. It was also reported [11] that *Address correspondence to this author at the Engineering of Materials and Nanotechnology Centre, Venezuelan Institute for Scientific Research, I.V.I.C., 20632, Caracas 1020-A, Venezuela; Tel/Fax: +58-212-5041922; E-mail: jmatos@ivic.gob.ve NiCa/AC catalyst pre-treated under helium flow at temperatures from 550 up to 800ºC showed higher methane conversions than those obtained after pre-treatment under H 2 flow.…”

Section: Introductionmentioning

confidence: 99%

“…Both reactions are spontaneous at about 700ºC but in a preliminary study of dry methane reforming on a carbon-supported Ni-Ca catalyst [11] we showed CO 2 can help control excess of carbon deposits without any detrimental effect on carbon supports after 5h reaction at 650ºC. It was also reported [11] that *Address correspondence to this author at the Engineering of Materials and Nanotechnology Centre, Venezuelan Institute for Scientific Research, I.V.I.C., 20632, Caracas 1020-A, Venezuela; Tel/Fax: +58-212-5041922; E-mail: jmatos@ivic.gob.ve NiCa/AC catalyst pre-treated under helium flow at temperatures from 550 up to 800ºC showed higher methane conversions than those obtained after pre-treatment under H 2 flow. However, contrary to our preliminary work [11], Chen and co-workers [7] reported that in absence of carbon dioxide or steam an activated carbon-supported nickel-based catalyst was deactivated by Ni 3 C formed during methane decomposition.…”

Section: Introductionmentioning

confidence: 99%

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Changes on Texture and Crystalline Phase of Activated Carbon-Supported Ni-Ca Catalyst During Dry Methane Reforming

Matos¹,

Rosales²,

González³

et al. 2010

TOMSJ

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Changes on texture and crystalline phase of AC-supported Ni-Ca catalyst during dry methane reforming were verified. Characterization by N 2 adsorption, XPS, XRD, TEM and HR-TEM was performed. XPS and XRD analysis suggest that the initial activity can be attributed to a nickel reduced phase formed during helium pre-treatment. TEM showed that a homogeneous distribution of Ni nanoparticles between 10-20nm at the tip of multi-walled carbon nanotubes is formed during reaction. HR-TEM showed diffusion of Ni nanoparticles and the formation of carbon-like nano onions with an interlayer separation of 0.5nm suggesting the formation of a ultra-microporous carbon structure. An increase in surface area from 231m 2 .g -1 to 2405m 2 .g -1 after 90min reaction was found and attributed to an in situ activation of carbon deposits by CO 2 gasification. The present results suggest that introducing CO 2 pulses during reaction carbon-supported Ni-Ca could be employed as potential catalysts for methane and other hydrocarbon reforming reactions at mild experimental conditions.

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Section: Introductionmentioning

confidence: 72%

Section: Methodsmentioning

confidence: 99%

Section: Methane Conversion and Xps Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Changes on Texture and Crystalline Phase of Activated Carbon-Supported Ni-Ca Catalyst During Dry Methane Reforming

Matos¹,

Rosales²,

González³

et al. 2010

TOMSJ

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The Influence of High‐Energy Faceted TiO₂ Supports on Co and Co−Ru Catalysts for Dry Methane Reforming

Wasantwisut

Xiao

Feng

et al. 2022

Chemistry An Asian Journal

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The reforming of methane from biogas has been proposed as a promising method of CO2 utilization. Co‐based catalysts are promising candidates for dry methane reforming. However, the main constraints limiting the large‐scale use of Co‐based catalysts are deactivation through carbon deposition (coking) and sintering due to weak metal‐support interaction. We studied the structure‐function properties and catalytic behavior of Co/TiO2 and Co−Ru/TiO2 catalysts using two different types of TiO2 supports, commercial TiO2 and faceted non‐stoichiometric rutile TiO2 crystals (TiO2*). The Co and Ru metal particles were deposited on TiO2 supports using a wet‐impregnation method with the percentage weight loading of Co and Ru of 5% and 0.5%, respectively. The materials were characterized using SEM, STEM‐HAADF, XRD, XPS and BET. The catalytic performance was studied using the CH4 : CO2 ratio of 3 : 2 to mimic the methane‐rich biogas composition. Our results indicate that the addition of Ru to Co catalysts supported on TiO2* reduces carbon deposition and influences oxygen mobility. Co and Co−Ru catalysts supported on TiO2* has superior activity with the highest conversion of CO2 and CH4 of 34.7% and 23.5%, respectively. Despite the improved performance, the Co−Ru/TiO2* catalyst has limited stability due to the proliferation of nanoparticle growth and TiOx layers on the surface of the nanoparticles indicating the prevalence of the strong‐metal support interaction.

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Catalytic Technology for Carbon Dioxide Reforming of Methane to Synthesis Gas

2009

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The mitigation and utilization of greenhouse gases, such as carbon dioxide and methane, are among the most important challenges in the area of energy research. Dry reforming of CH4 (DRM), which uses both CO2 and CH4 as reactants, is a potential method to utilize the greenhouse gases in the atmosphere. Natural gas containing high concentrations of CO2 and CH4 could therefore be utilized for hydrogen and synthesis gas (syngas) production in the near future, without need for the removal of CO2 from the source gas. Thus, the DRM reaction is a suitable process to convert CH4 and CO2 to syngas, which is a raw material for liquid fuel production, through the Fischer–Tropsch process. Herein, the development of CO2 reforming for syngas production is reviewed, covering process chemistry, catalyst development, and process technologies as well as the potential future direction for this process.

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Activated carbon supported Ni–Ca: Influence of reaction parameters on activity and stability of catalyst on methane reformation

Cited by 50 publications

References 22 publications

Changes on Texture and Crystalline Phase of Activated Carbon-Supported Ni-Ca Catalyst During Dry Methane Reforming

Changes on Texture and Crystalline Phase of Activated Carbon-Supported Ni-Ca Catalyst During Dry Methane Reforming

The Influence of High‐Energy Faceted TiO₂ Supports on Co and Co−Ru Catalysts for Dry Methane Reforming

Catalytic Technology for Carbon Dioxide Reforming of Methane to Synthesis Gas

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Activated carbon supported Ni–Ca: Influence of reaction parameters on activity and stability of catalyst on methane reformation

Cited by 50 publications

References 22 publications

Changes on Texture and Crystalline Phase of Activated Carbon-Supported Ni-Ca Catalyst During Dry Methane Reforming

Changes on Texture and Crystalline Phase of Activated Carbon-Supported Ni-Ca Catalyst During Dry Methane Reforming

The Influence of High‐Energy Faceted TiO2 Supports on Co and Co−Ru Catalysts for Dry Methane Reforming

Catalytic Technology for Carbon Dioxide Reforming of Methane to Synthesis Gas

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The Influence of High‐Energy Faceted TiO₂ Supports on Co and Co−Ru Catalysts for Dry Methane Reforming