Coke Deposition on a Commercial Nickel Oxide Catalyst During the Steam Reforming of Methane

The aim of this work is to evaluate the catalytic performance in steam reforming of methane of the NiAl2O4catalysts prepared by combustion reaction with different urea levels. The catalysts were prepared with urea in the stoichiometric proportion, and with excess of 10% and 20%. The samples were characterized by DRX, textural analysis by nitrogen adsorption, SEM, TPR, and then, catalytically evaluated in the methane reforming reaction. The results showed the presence of NiAl2O4and traces of NiO for all the samples. The increase of the urea content caused an increase in the particle size and a reduction in the surface area, from 171 to 35 m2/g. All the samples presented irregular morphology. The TPR curves showed peaks of reduction of the NiO species, and reduction of nickel present in the NiAl2O4. Regarding the conversion of methane to synthesis gas, it was observed that the increase of the urea content allowed obtaining higher conversion. However, it was also observed a rapid deactivation of these catalysts due to high coke deposition on the active phases surfaces.

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Sustainable Hydrogen Production by Ethanol Steam Reforming using a Partially Reduced Copper-Nickel Oxide Catalyst

ChemSusChem ◽

10.1002/cssc.201403433 ◽

2015 ◽

Vol 8 (10) ◽

pp. 1787-1793 ◽

Cited By ~ 22

Author(s):

Li-Chung Chen ◽

Hongkui Cheng ◽

Chih-Wei Chiang ◽

Shawn D. Lin

Keyword(s):

Hydrogen Production ◽

Nickel Oxide ◽

Steam Reforming ◽

Oxide Catalyst ◽

Ethanol Steam Reforming ◽

Copper Nickel ◽

Ethanol Steam

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Evaluation of Glycine Excess over NiAl2O4 Catalysts Prepared by Combustion Reaction for Steam Methane Reforming

Materials Science Forum ◽

10.4028/www.scientific.net/msf.660-661.916 ◽

2010 ◽

Vol 660-661 ◽

pp. 916-921 ◽

Cited By ~ 1

Author(s):

Elvia Leal ◽

Laédna Souto Neiva ◽

Jean Pierre La Martini Lima Sousa ◽

Fábio Argolo ◽

Heloysa Martins Carvalho Andrade ◽

...

Keyword(s):

Steam Reforming ◽

Nitrogen Adsorption ◽

Active Surface ◽

Combustion Reaction ◽

Coke Deposition ◽

Stoichiometric Ratio ◽

Content Increase ◽

Steam Methane ◽

Steam Reforming Of Methane ◽

Glycine Content

The aim of this work is to evaluate the catalytic activity of NiAl2O4 powders, prepared by combustion reaction with different glycine contents, for the steam reforming of methane. The NiAl2O4 powders were prepared according to the theory of propellants and explosives, using glycine reductant in stoichiometric ratio (Φe = 1) and in excess of 10% and 20% (Φe < 1). During the synthesis, parameters such as flame combustion temperature and time were measured. The samples were characterized by XRD, textural analysis by nitrogen adsorption (BET/BJH), TPR and evaluated as catalysts for the steam reforming of methane. The XRD results showed the presence of NiAl2O4 as major phase and traces of NiO and Ni in all the samples. The glycine content increase caused a decrease of crystallite size and an increase of surface area, from 29 to 39 m2/g. The TPR profiles showed reduction peaks of NiO species in weak interaction with the support, and reduction of nickel present in the NiAl2O4. It was observed that higher methane conversions were obtained in the presence of NiAl2O4 samples prepared using glycine excess. However, it was also observed a rapid deactivation of these catalysts due to high coke deposition onto the active surface phases.

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Carbon monoxide formation as an intermediate product in photocatalytic steam reforming of methane with lanthanum-doped sodium tantalate

Catalysis Science & Technology ◽

10.1039/d1cy00264c ◽

2021 ◽

Author(s):

Wirya Sarwana ◽

Akihiko Anzai ◽

Daichi Takami ◽

Akira Yamamoto ◽

Hisao Yoshida

Keyword(s):

Carbon Monoxide ◽

Solar Energy ◽

Steam Reforming ◽

Intermediate Product ◽

Room Temperature ◽

Carbon Monoxide Formation ◽

Steam Reforming Of Methane

Photocatalytic steam reforming of methane (PSRM) has been studied as an attractive method to produce hydrogen by utilizing photoenergy like solar energy around room temperature with metal-loaded photocatalysts, where methane...

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