Hydrogen Production from Methane and Carbon Dioxide by Catalyst-Assisted Chemical Looping

Galvita, Vladimir; Poelman, Hilde; Marin, Guy

doi:10.1007/s11244-011-9709-7

Cited by 35 publications

(22 citation statements)

References 27 publications

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“…Based on this concept, catalyst-assisted chemical looping dry reforming (CCDR) was recently proposed as an intensified process with the goal of maximum utilization of two main greenhouse gases, CH 4 and CO 2 , in terms of CO yield. This process is generally implemented over a bifunctional reactor bed, composed of either a physical mixture of a reforming catalyst and a metal oxide looping material, or a bifunctional looping material [15,23,30]. The entire CCDR process yields the dry reforming of CH 4 into CO as an overall reaction, being a strongly endothermic process.…”

Section: Introductionmentioning

confidence: 99%

Advanced Chemical Looping Materials for CO2 Utilization: A Review

Galvita

Poelman

et al. 2018

Materials

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Combining chemical looping with a traditional fuel conversion process yields a promising technology for low-CO2-emission energy production. Bridged by the cyclic transformation of a looping material (CO2 carrier or oxygen carrier), a chemical looping process is divided into two spatially or temporally separated half-cycles. Firstly, the oxygen carrier material is reduced by fuel, producing power or chemicals. Then, the material is regenerated by an oxidizer. In chemical looping combustion, a separation-ready CO2 stream is produced, which significantly improves the CO2 capture efficiency. In chemical looping reforming, CO2 can be used as an oxidizer, resulting in a novel approach for efficient CO2 utilization through reduction to CO. Recently, the novel process of catalyst-assisted chemical looping was proposed, aiming at maximized CO2 utilization via the achievement of deep reduction of the oxygen carrier in the first half-cycle. It makes use of a bifunctional looping material that combines both catalytic function for efficient fuel conversion and oxygen storage function for redox cycling. For all of these chemical looping technologies, the choice of looping materials is crucial for their industrial application. Therefore, current research is focused on the development of a suitable looping material, which is required to have high redox activity and stability, and good economic and environmental performance. In this review, a series of commonly used metal oxide-based materials are firstly compared as looping material from an industrial-application perspective. The recent advances in the enhancement of the activity and stability of looping materials are discussed. The focus then proceeds to new findings in the development of the bifunctional looping materials employed in the emerging catalyst-assisted chemical looping technology. Among these, the design of core-shell structured Ni-Fe bifunctional nanomaterials shows great potential for catalyst-assisted chemical looping.

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Section: Introductionmentioning

confidence: 99%

Advanced Chemical Looping Materials for CO2 Utilization: A Review

Galvita

Poelman

et al. 2018

Materials

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“…Both CO 2 in the feed and product have this retarding effect on the metal oxide reduction rate. This limitation can be overcome if a physical mixture of a Nibased catalyst and iron oxide [33] or a bifunctional material [19,34] is used as oxygen storage material. During the first step, a mixed feed of CH 4 and CO 2 is then converted over the catalyst into syngas:…”

Section: Introductionmentioning

confidence: 99%

CO2 conversion to CO by auto-thermal catalyst-assisted chemical looping

Buelens

Theofanidis

et al. 2016

Journal of CO2 Utilization

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“…Chemical looping partial oxidation (CLPO) is particularly suited to generate high quality syngas with tunable H 2 :CO ratio. Perovskites and metal oxides, such as SrFeO 3−δ /CaO•MnO [129], Mo-Fe2O3-CeZrO2 [130], and LaFeO3 [131], have been reported to yield a H 2 :CO ratio of 2. The syngas formed can be further utilized separately to produce methanol.…”

Section: Beyond Catalysis: Chemical Loopingmentioning

confidence: 99%

Approaches for Selective Oxidation of Methane to Methanol

et al. 2020

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Methane activation chemistry, despite being widely reported in literature, remains to date a subject of debate. The challenges in this reaction are not limited to methane activation but extend to stabilization of the intermediate species. The low C-H dissociation energy of intermediates vs. reactants leads to CO2 formation. For selective oxidation, nature presents methane monooxygenase as a benchmark. This enzyme selectively consumes methane by breaking it down into methanol. To assemble an active site similar to monooxygenase, the literature reports Cu-ZSM-5, Fe-ZSM-5, and Cu-MOR, using zeolites and systems like CeO2/Cu2O/Cu. However, the trade-off between methane activation and methanol selectivity remains a challenge. Density functional theory (DFT) calculations and spectroscopic studies indicate catalyst reducibility, oxygen mobility, and water as co-feed as primary factors that can assist in enabling higher selectivity. The use of chemical looping can further improve selectivity. However, in all systems, improvements in productivity per cycle are required in order to meet the economical/industrial standards.

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Hydrogen Production from Methane and Carbon Dioxide by Catalyst-Assisted Chemical Looping

Cited by 35 publications

References 27 publications

Advanced Chemical Looping Materials for CO2 Utilization: A Review

Advanced Chemical Looping Materials for CO2 Utilization: A Review

CO2 conversion to CO by auto-thermal catalyst-assisted chemical looping

Approaches for Selective Oxidation of Methane to Methanol

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