Effect of combining Al, Mg, Ce or La oxides to extracted rice husk nanosilica on the catalytic performance of NiO during COx-free hydrogen production via methane decomposition

Abstract: A growing interest in hydrogen use has been observed due to its environmentally friendlycharacteristics. However, the current methods of hydrogen production from natural gas are based on steammethane reforming, partial oxidation, and autothermal reforming. These processes produce a mixture ofhydrogen and carbon oxides and after water-gas shift reactions, in order to increase the production ofhydrogen, a large amount of CO2 is generated and possibly released in the atmosphere. In this context, thecatalytic methane decomposition has been receiving attention as an alternative route to the production ofCOx-free hydrogen. It has been reported that the appropriate group of catalysts and reactors can lead to aviable process. Current investigations attempt to increase the yield of hydrogen. The present work aims toevaluate the processes currently used for that and to present the preliminary results obtained with cobaltcatalysts for methane decomposition. A comparison between the conventional processes and the suggestedones is made, and the major advantages in the use of methane decomposition are presented.

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A Nanomesoporous Catalyst from Modified Red Mud and Its Application for Methane Decomposition to Hydrogen Production

Journal of Nanomaterials ◽

10.1155/2016/6947636 ◽

2016 ◽

Vol 2016 ◽

pp. 1-8 ◽

Cited By ~ 3

Author(s):

Xiaoke Fang ◽

Quanrun Liu ◽

Peng Li ◽

Haipeng Li ◽

Fenghai Li ◽

...

Keyword(s):

Hydrogen Production ◽

Red Mud ◽

Chemical Structure ◽

Catalytic Performance ◽

Methane Decomposition ◽

Size Distributions ◽

Nanoscale Particles ◽

Modification Process ◽

Pore Size Distributions ◽

Physical And Chemical

A type of nanomesoporous modified red mud (MRM) catalyst was prepared and utilized for catalytic methane decomposition (CMD) to produce hydrogen. The modification process significantly simplified the mineral composition of the red mud (RM); in the meantime, the physical and chemical structure of RM was changed. TEM images suggested that MRM was a kind of nanomesoporous material assembled by a number of uniformly nanoscale particles, BET results showed that the pore size distributions of MRM were ranged from 3 to 12 nm, and the specific surface area and total pore volumes of red mud improved from 8.00 m2/g and 0.08 cm3/g to 190.61 m2/g and 0.39 cm3/g, respectively. The catalytic performance of the catalysts has been tested at 800°C; the results showed that MRM exhibited much higher activity and stability than RM for CMD.

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Transition metal nanoparticles dispersed in an alumina matrix as active and stable catalysts for COx-free hydrogen production from ammonia

Journal of Materials Chemistry A ◽

10.1039/c5ta04179a ◽

2015 ◽

Vol 3 (33) ◽

pp. 17172-17180 ◽

Cited By ~ 24

Author(s):

Ying-Qiu Gu ◽

Zhao Jin ◽

Hu Zhang ◽

Rong-Jie Xu ◽

Ming-Jiang Zheng ◽

...

Keyword(s):

Hydrogen Production ◽

Transition Metal ◽

Catalytic Performance ◽

Precipitation Method ◽

Ni Nanoparticles ◽

Alumina Matrix ◽

Transition Metal Nanoparticles ◽

Free Hydrogen ◽

Co Precipitation ◽

Excellent Catalytic Performance

Transition metal (Fe, Co, and Ni) nanoparticles dispersed in an alumina matrix were synthesized by a facile co-precipitation method and showed excellent catalytic performance for NH3 decomposition.

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