Utilizing carbon dioxide as a regenerative agent in methane dry reforming to improve hydrogen production and catalyst activity and longevity

Alenazey, Feraih

doi:10.1016/j.ijhydene.2014.02.148

Cited by 21 publications

(13 citation statements)

References 35 publications

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“…To handle the coking difficulties, various options are being evaluated [39][40][41]. These include new catalyst design (including promotion, deposition, support variation, and structural designs), varying reaction conditions (such as temperature, pressure, and reactant ratios), and reactor design [42][43][44][45][46][47][48]. Catalyst preparation conditions can also have dramatic effects [49][50][51].…”

Section: Nature Of Coke Depositsmentioning

confidence: 99%

A review on coke management during dry reforming of methane

Muraza

Galadima

2015

Int. J. Energy Res.

302

139

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Summary The dry (CO2) reforming of methane is a great promising technology, particularly because of its dual advantages of natural gas valorization and mitigating global warming via carbon dioxide sequestration. However, coke management is the most difficult problem in commercialization of the process. We have therefore examined in this paper the various catalytic systems being evaluated for the dry reforming with emphasis on operating parameters, activity, and coke deposition. Other factors such as the catalyst promoter, the reactor system, and the periodical regeneration were also critically reviewed. The benefits of utilizing methane from natural gas and other sources, where carbon dioxide is considered as an impurity component, are emphasized. Structured basic catalysts, with periodic regeneration certainties, are strong candidates for industrial applications. Therefore, efforts to build commercial scales for the benefit of global energy industries were highlighted. Copyright © 2015 John Wiley & Sons, Ltd.

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Section: Nature Of Coke Depositsmentioning

confidence: 99%

A review on coke management during dry reforming of methane

Muraza

Galadima

2015

Int. J. Energy Res.

302

139

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“…Coke formation on the catalyst is one of the main disadvantages of this process and thus many researchers have aimed to obtain catalysts that would reduce the activity loss by coke. Reaction (3) is thermodynamically favored at high temperatures, while carbon generation is fostered at low temperatures in (4) and (5) [2].…”

Section: Introductionmentioning

confidence: 99%

“…An intense work focused on the development of catalysts capable of maintaining a good level of activity during a sufficiently long operating time, by decreasing coke formation rate [3]. Although catalysts based on noble metals such as Pd, Pt, Rh and Ru have been proposed [4,5], their high price makes their industrial use unprofitable.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Study of Dry Reforming of Methane Over Ni–Ce/Al2O3 Catalyst with Deactivation

et al. 2019

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A kinetic study for dry reforming of methane over Ni-Ce/Al 2 O 3 catalyst was performed, taking into account both the main reactions and the catalyst deactivation. The catalyst was prepared by a sequential wet impregnation process, with loadings of 5 wt.% Ni and 10 wt.% Ce. Experimental tests were carried out in a fixed bed reactor between 475 and 550 °C and several spatial times, using nitrogen as diluent. Several kinetic equations were compared. The best fit of experimental data was achieved using a Langmuir-Hinshelwood mechanism which takes into account the presence of two active sites. Preexponential factor and activation energy were calculated. the kinetics of deactivation was also determined. The relationship between catalyst activity and coke concentration was also studied. Several deactivation equations were considered in order to choose the best fit with experimental data.

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“…-Dry reforming of methane (DRM) CH 4 þ CO 2 In this case the reverse water gas shift reaction would be undesirable, since it would consume the target product (H 2 ). Reactions 3 and 4 are also undesirable, since they would cause a loss of catalyst activity by coke deposition over its surface.…”

Section: Introductionmentioning

confidence: 99%

Dry reforming of biogas in fluidized bed: Process intensification

Ugarte

Durán

Lasobras

et al. 2017

International Journal of Hydrogen Energy

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Available online xxxKeywords: Biogas Dry reforming Hydrogen Membranes Fluidized bed a b s t r a c t Biogas is a renewable resource obtained mainly from the anaerobic fermentation of agroindustrial and anthropogenic residues. The production of hydrogen by dry reforming of methane represents a potential application for this renewable energy carrier. This could play a positive contribution towards meeting the challenge of providing a global supply of energetically sustainable and environmentally friendly energy. This work combines a catalytic reaction, a separation and the catalyst regeneration in a single reactor. To this end, a two zone fluidized bed reactor (TZFBR) with hydrogen selective membranes has been employed (TZFBR þ MB). The operating conditions for the process of dry reforming of biogas have been optimized experimentally, both in TZFBR and TZFBR þ MB. Several catalysts were prepared (Ni/Al 2 O 3 , NieCe/Al 2 O 3 , NieCo/Al 2 O 3 ), characterized and tested in reactions in both TZFBR and in TZFBR þ MB. Finally, the influence of using oxygen or carbon dioxide as regenerating gases in the process has been studied. Experimental results show the feasibility of using CO 2 for in situ catalyst regeneration, avoiding the potential problems associated with the use of O 2 .ScienceDirect j o urn al h om epa ge: www.elsev ier.com/locate/he i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y x x x ( 2 0 1 7 ) 1 e9 http://dx.

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Utilizing carbon dioxide as a regenerative agent in methane dry reforming to improve hydrogen production and catalyst activity and longevity

Cited by 21 publications

References 35 publications

A review on coke management during dry reforming of methane

A review on coke management during dry reforming of methane

Kinetic Study of Dry Reforming of Methane Over Ni–Ce/Al2O3 Catalyst with Deactivation

Dry reforming of biogas in fluidized bed: Process intensification

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