Decomposition of hydrocarbons to hydrogen and carbon

Ahmed, Shakeel; Aitani, Abdullah M.; Rahman, Faizur; Aldawood, Ali; Al‐Muhaish, Fahad

doi:10.1016/j.apcata.2009.02.038

Cited by 222 publications

(104 citation statements)

References 115 publications

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“…Other than using alternate energies for electrolysis of water or the biological methods, no techniques are available to produce carbon emission free H 2 from fossil fuels. Many researchers worldwide have realized the need to produce H 2 without any CO 2 emission [1,[6][7][8][9][10][11][12][13][14]. Carbon monoxide (CO) is a toxic gas emitted by power plants and blast furnaces with a severe impact on global warming.…”

Section: Open Accessmentioning

confidence: 99%

Catalytic Studies of Sodium Hydroxide and Carbon Monoxide Reaction

2012

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Abstract:We have studied the effect of ball milling on alumina mixed nickel, magnetite and Raney nickel on the reaction: 2NaOH(s) + CO (g) = Na 2 CO 3 (s) + H 2 (g) and determined the optimum particle size for the catalysts. The best performance was shown by a 2 h ball milled Raney nickel with average crystallite size of 209 Å. This reaction serves the dual purpose of carbon sequestration and yielding hydrogen gas.

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Section: Open Accessmentioning

confidence: 99%

Catalytic Studies of Sodium Hydroxide and Carbon Monoxide Reaction

2012

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“…Two aqueous solutions (0.5 M) of Cu(NO 3 ) 2 and Ce(NO 3 ) 3 were mixed under vigorous stirring, to get 9:1 Ce(OH) 3 :Cu(OH) 2 weight ratio, then a NaOH solution (2 M) was added dropwise until a stable pH of 9 was reached. A precipitate with the mixture of Cu and Ce hydroxides was generated.…”

Section: Synthesis and Characterization Of The Cuo X /Ceo 2 Powder Camentioning

confidence: 99%

“…This is an attractive process especially from a environmental point of view, however the real ecologic impact of H 2 as an energy carrier is in the processes involved in its production. Considering that hydrogen is not an isolated element, it has to be extracted from organic molecules such as hydrocarbons, alcohols or ethers through reforming processes and consequently CO 2 , H 2 O and CO are also produced [2,3].…”

Section: Introductionmentioning

confidence: 99%

Preferential oxidation of CO (CO-PROX) over CuOx/CeO2 coated microchannel reactor

et al. 2012

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The general aspects of the synthesis and characterization results of a CuO x /CeO 2 catalyst were presented. In addition the principal steps for manufacturing a microchannel reactor and for the coating of the CuO x /CeO 2 catalyst onto the microchannels walls, were also summarized. The catalytic activity of this microchannel reactor during the preferential oxidation of CO (CO-PROX) was evaluated employing a feed-stream that simulates a reformate off-gas after the WGS unit. Two activation atmospheres were studied (H 2 /N 2 and O 2 /N 2 ). The reducing pretreatment improved the resistance to deactivation by formation of carbonaceous species over the catalyst surface at high temperatures. The presence of H 2 O and CO 2 in the feed-stream was also analyzed indicating that the adsorption of CO 2 inhibited the conversion of CO at lower temperatures because these compounds modified the active sites through the formation of carbonaceous species on the catalyst surface. Finally, the experimental results of the microreactor performance were compared with CFD simulations that were carried out using a kinetic for the CuO x /CeO 2 powder catalyst. The experimental results were reasonably well described by the model, thus confirming its validity.

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“…However, Ni and Co-based catalysts suffered from rapid deactivation when used at temperatures higher than ca. 650 ºC due to metal particle encapsulation by carbon [12][13][14][15][16]. Fe-based catalysts can operate at higher temperatures than Co or Ni based catalysts without suffering from deactivation, resulting in higher methane conversions due to the positive shift of the thermodynamic equilibrium.…”

Section: Introductionmentioning

confidence: 99%