NiO CaO materials as promising catalysts for hydrogen production through carbon dioxide capture and subsequent dry methane reforming

Cruz-Hernández, Alejandra; Mendoza-Nieto, J. Arturo; Pfeiffer, Heriberto

doi:10.1016/j.jechem.2017.07.002

Cited by 38 publications

(29 citation statements)

References 43 publications

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“…Accompanying the discussions on the reduction of greenhouse gas emissions, the dry reforming reaction (cf. Equation (2)) has increasingly attracted attention as an option to convert carbon dioxide into a useful product [4,5 (2) In the published works, carbon formation and the development of catalysts for carbon free operation in dry-or mixed reforming processes is usually the focus of attention. In dry or mixed reforming reactions, the risk of formation of solid carbon is increased due to the lower H/C and O/C ratio.…”

Section: Introductionmentioning

confidence: 99%

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(Solar) Mixed Reforming of Methane: Potential and Limits in Utilizing CO2 as Feedstock for Syngas Production—A Thermodynamic Analysis

2018

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The reforming of natural gas with steam and CO2 is commonly referred to as mixed reforming and considered a promising route to utilize CO2 in the production of synthetic fuels and base chemicals such as methanol. In the present study, the mixed reforming reaction is assessed regarding its potential to effectively utilize CO2 in such processes based on simple thermodynamic models. Requirements for the mixed reforming reactions based on process considerations are defined. These are the avoidance of carbon formation in the reactor, high conversion of the valuable inlet streams CH4 and CO2 as well as a suitable syngas composition for subsequent synthesis. The syngas composition is evaluated based on the module M = ( z H 2 − z CO 2 ) / ( z CO 2 + z CO ) , which should assume a value close to 2. A large number of different configurations regarding CO2/H2O/CH4 at the reactor inlet, operating pressure and outlet temperature are simulated and evaluated according to the defined requirements. The results show that the actual potential of the mixed reforming reaction to utilize CO2 as feedstock for fuels and methanol is limited to approximately 0.35 CO2/CH4, which is significantly lower than suggested in literature. At 900 °C and 7 bar at the reactor outlet, which is seen suitable for solar reforming, a ratio of H2O/CH4 of 1.4 can be set and the resulting value of M is 1.92 (CO2/CO/H2 = 0.07/0.4/1).

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Section: Introductionmentioning

confidence: 99%

“…Zhang, et al [7] investigated catalyst samples with mesoporous structures to reduce the rate of carbon formation. The relevant carbon formation routes for a reforming process are the methane cracking reaction-Equation 3, the Boudouard reaction-Equation 4and the carbon monoxide reduction-Equation (5).…”

Section: Introductionmentioning

confidence: 99%

(Solar) Mixed Reforming of Methane: Potential and Limits in Utilizing CO2 as Feedstock for Syngas Production—A Thermodynamic Analysis

2018

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“…14 (a), limited the concentration of CH 4 to 40% would result in important amount of syngas production while increased CO 2 concentration led to the increase in syngas production. Thus, the concentration of CO 2 in the process is crucial to determining syngas yield [9,23,29,35,45] .…”

Section: Effects Of Co 2 and Ch 4 Concentration On The Process Performentioning

confidence: 99%

“…This may be due to the possible side reactions such as CH 4 combustion or CH 4 partial oxidation in the system [10] . Cruz-Hernández [9] reported that syngas produced at the highest temperature was not produced by the CH 4 reforming, but by the CH 4 partial oxidation. However, the decrease in H 2 O would be attributed to carbon gasification into CO and H 2 since, at high temperatures (950 °C and above), H 2 O can react with a layer of coal to produce carbon CO and H 2 [52] .…”

Section: Effect Of Catalyst Ni/al 2 O 3 On Syngas Productionmentioning

confidence: 99%

“…Utilizing CO 2 captured, for example, to produce syngas suitable for dimethyl carbonate (DMC) synthesis can reduce the GWP by 4.3 times and ozone layer depletion by 13 times compared to the conventional DMC process [4] . However, solar thermochemical fuel production processes generally aimed at producing syngas (CO and H 2 ) are the most attractive ways for CO 2 utilization as a feedstock to produce carbon-neutral fuels [8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

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Analysis of CO2 utilization into synthesis gas based on solar thermochemical CH4-reforming

Lougou

Shuai

Chaffa

et al. 2019

Journal of Energy Chemistry

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Boosting the Catalytic Performance of CuO_x in CO₂ Hydrogenation by Incorporating CeO₂ Promoters

Pan

Wang

et al. 2022

Advanced Sustainable Systems

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the selective hydrogenation route is more attractive, because the CO 2 can be converted to value-added chemicals and fuels. [2] Through delicately designing the catalysts and accurately controlling the reaction conditions, various products, including olefins, gasoline, aromatics, ethanol, and the platform compounds (CO and methanol) can be produced. [3,4] Specifically, the selective conversion of CO 2 to CO is one of the most important ones, this is because CO can be used to transform to long-chain hydrocarbons via the Fischer-Tropsch process. [3b,4] Although great achievements have been made, many challenges still remain, especially the low-temperature CO 2 activation as well as the wide temperature-range CO selectivity due to the formation of by-product CH 4 . [5] More recently, transition metal Cu has received more attention as the active sites for CO 2 hydrogenation. Cu-based catalysts have some distinguished features, such as high selectivity toward CO, low cost, and unique electronic properties. [6] However, they are also facing problems in their poor activity. [6b,7] Therefore, it is pressing for seeking feasible route to overcome the natural limitation of Cu elements in CO 2 hydrogenation. Previous reports provide a potential solution by integrating CeO 2 as the promoters. CeO 2 is considered to be an ideal active material for CO 2 activation because of the existence of large amounts of oxygen vacancies on its surface, who possess powerful capability in CO 2 adsorption and activation. [8] However, CeO 2 is very difficult to activate hydrogen directly. Therefore, it is generally to combine CeO 2 with a component that can activate hydrogen to build an effective catalyst, the core of which is the precise control of the interface. [8,9] The interface can not only promote the activation of reactants by the multiple catalytic sites provided, [10] but also adjust the reaction pathways by the strong electronic interaction induced. [11] So far, many works have been reported based on Cu-CeO 2 catalysts for CO 2 hydrogenation, [7,8,12] however, it still lacks effective methods to achieve the goal of precisely controlling the Cu-CeO 2 interface, [13] as well as the deep understanding of its unique reactivity.Herein, we developed a facile and effective strategy to integrate CeO 2 nanoparticles (NPs) on Cu 2 O nanocubes (NCs) in a controllable way (the obtained sample denoted as CuO x -XCeO 2 , X refers to the feed amount of Ce(NO 3 ) 3 , x represents Cu 2 O and CuO compound). When utilized as the catalysts for CO 2 hydrogenation, they present good catalytic performance. Among the Copper is one of the most promising components in CO 2 hydrogenation reactions, however, it still seriously suffers from the lower capability in CO 2 activity, as well as poor durability. Herein, a novel copper-cerium mixed metal oxide is fabricated via a controllable surface deposition route, showing excellent catalytic performance in CO 2 hydrogenation. Of particular note, among the various samples with tunable Cu/Ce molar ratios, t...

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NiO CaO materials as promising catalysts for hydrogen production through carbon dioxide capture and subsequent dry methane reforming

Cited by 38 publications

References 43 publications

(Solar) Mixed Reforming of Methane: Potential and Limits in Utilizing CO2 as Feedstock for Syngas Production—A Thermodynamic Analysis

(Solar) Mixed Reforming of Methane: Potential and Limits in Utilizing CO2 as Feedstock for Syngas Production—A Thermodynamic Analysis

Analysis of CO2 utilization into synthesis gas based on solar thermochemical CH4-reforming

Boosting the Catalytic Performance of CuO_x in CO₂ Hydrogenation by Incorporating CeO₂ Promoters

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NiO CaO materials as promising catalysts for hydrogen production through carbon dioxide capture and subsequent dry methane reforming

Cited by 38 publications

References 43 publications

(Solar) Mixed Reforming of Methane: Potential and Limits in Utilizing CO2 as Feedstock for Syngas Production—A Thermodynamic Analysis

(Solar) Mixed Reforming of Methane: Potential and Limits in Utilizing CO2 as Feedstock for Syngas Production—A Thermodynamic Analysis

Analysis of CO2 utilization into synthesis gas based on solar thermochemical CH4-reforming

Boosting the Catalytic Performance of CuOx in CO2 Hydrogenation by Incorporating CeO2 Promoters

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Boosting the Catalytic Performance of CuO_x in CO₂ Hydrogenation by Incorporating CeO₂ Promoters