A comparative study of dry reforming of methane over nickel catalysts supported on perovskite-type LaAlO3 and commercial α-Al2O3

Figueredo, Gilvan Pereira de; Medeiros, Rodolfo L.B.A.; Macedo, Heloísa P.; Oliveira, Ângelo A.S.; Braga, Renata Martins; Mercury, José Manuel Rivas; Melo, M. A. F.; Melo, D.M.A.

doi:10.1016/j.ijhydene.2018.04.224

Cited by 64 publications

(25 citation statements)

References 66 publications

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“…The weight loss observed over 600 °C may be attributed to the oxidation of carbon. 50,51 For the Ni catalyst, there is about 35% of weight loss. For the Pt catalyst, about 29% of weight loss is observed.…”

Section: Resultsmentioning

confidence: 99%

Experimental Study on Dry Reforming of Biogas for Syngas Production over Ni-Based Catalysts

Chein

Yang

2019

ACS Omega

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Syngas production from dry reforming of biogas (DRB) is studied experimentally in this work. Ni/Al2O3, Pt/Al2O3, and Pt-Ni/Al2O3 are used as catalysts to examine the effect of CO2 content in biogas and H2O addition on DRB performance for reaction temperatures in the 600–800 °C range. It is found that the bimetallic Pt–Ni catalyst exhibits the best activity and thermal stability among the three types of catalysts studied due to better carbon deposition resistance. Because CO2 functions as the oxidant in combustion, CH4 conversion is enhanced when the biogas contains more CO2. One hundred percent CO2 conversion can be reached for biogas containing a less amount of CO2 at high temperatures. With H2O addition in DRB, the steam reforming of methane (SRM) reaction is the dominant reaction, resulting in higher H2 and CO yields with biogas containing lesser amounts of CO2. However, lower CH4 conversion and negative CO2 conversion do result. With higher CO2 content in the biogas, higher CH4 and CO2 conversions can be obtained. Lower yields of H2 and CO are obtained due to less SRM dominance. With H2O addition in biogas, the H2/CO ratio with a value greater than 1 can be obtained from DRB. It is also found that the H2/CO ratio with a value of 2.1 can be obtained for reactant composition with a molar ratio of CH4/CO2/H2O = 1:0.25:1 and reaction temperature of 800 °C.

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Section: Resultsmentioning

confidence: 99%

Experimental Study on Dry Reforming of Biogas for Syngas Production over Ni-Based Catalysts

Chein

Yang

2019

ACS Omega

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“…[7] However, most of the existing catalysts using common oxide supports as well conventional nickel deposition routes face two important drawbacks: firstly metal sintering, which is accentuated by the high temperature at which the reaction has to be carried out due to thermodynamic reasons; [8,9] secondly, important formation of carbon deposits during the course of the reaction, due to the occurrence of CH 4 decomposition as side reaction [10,11] that leads to progressive activity loss by inhibiting the active sites and to plugging of the reactor when carbon nanotubes are formed in big amount. [12,13] In the last decade, numerous attempts like the use of a bimetallic catalyst [14][15][16] or altering the type of support [17,18] have been made to overcome these barriers and design more robust catalysts.…”

Section: Introductionmentioning

confidence: 99%

Porous Nickel‐Alumina Derived from Metal‐Organic Framework (MIL‐53): A New Approach to Achieve Active and Stable Catalysts in Methane Dry Reforming

et al. 2019

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An Al‐containing MIL‐53 metal‐organic framework with very high surface area (SBET=1130 m2.g−1, N2 sorption) was used as sacrificial template to prepare a nickel‐alumina‐based catalyst (Ni0AlMIL) highly active and stable in the reaction of dry reforming of methane (DRM). The procedure consisted in impregnating the activated (solvent free) MIL‐53 sample with a nickel precursor solution, then calcining the material to remove the organic linkers and subsequently reducing it to form the reduced nickel active phase. At the step of calcination, this procedure results in the formation of a porous uniform spinel phase with Ni nanospecies embedded in the alumina‐based matrix, as deduced from XRD, TPR and TEM analyses. This leads after reduction to a porous lamellar γ‐Al2O3 material with small Ni0 nanoparticles homogeneously dispersed and stabilized within the support. The performances of this catalyst in DRM are better than those of two reference Ni/alumina catalysts prepared for comparison by conventional nickel impregnation of two preformed alumina supports: a first one obtained by calcination of MIL‐53 (AlMIL) and a second one consisting of a commercial γ‐Al2O3 batch (AlCOM). Under steady state conditions at a temperature of 650 °C and a pressure of 1 bar, the higher CH4 and CO2 conversions (till 3 times higher than on Ni0/AlCOM), high catalytic stability (no loss of activity after 13–100 h) and higher selectivity towards DRM (H2:CO products ratio remaining at 1) on Ni0AlMIL compared to the other catalysts is believed to come from the particularly strong interaction between the nickel and alumina phases generated by using the unique high specific surface of the parent MOF support to deposit nickel. This creates an intimate mixing favorable to a persisting interaction of the nickel nanoparticles with the alumina support in the reduced material. The lamellar shape of the γ‐Al2O3 composing the catalyst and its remaining high specific surface may also contribute to the excellent Ni resistance to sintering and in turn to the inhibition of carbon nanotubes formation during the reaction.

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“…Carbon nanotube (CNT), well-known as a new nano-carbon catalyst support, possesses many advantages, such as large surface area, unique electronic properties, tubular structure, chemical inertness, thermal stability, and high mechanical strength (Figueira et al, 2018). Therefore, it can effectively improve the dispersion of metal particles and enhance the adsorption of reactants (Figueredo et al, 2018). Ma et al (2013) prepared a series of catalysts for the CRM reaction of Ni nanoparticles loaded inside or outside CNTs and studied the effect of catalytic sites on the surface of CNTs.…”

Section: Carbon Supportsmentioning

confidence: 99%

Recent Progresses in the Design and Fabrication of Highly Efficient Ni-Based Catalysts With Advanced Catalytic Activity and Enhanced Anti-coke Performance Toward CO2 Reforming of Methane

Chen

et al. 2020

Front. Chem.

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CO 2 reforming of methane (CRM) can effectively convert two greenhouse gases (CO 2 and CH 4) into syngas (CO + H 2). This process can achieve the efficient resource utilization of CO 2 and CH 4 and reduce greenhouse gases. Therefore, CRM has been considered as a significantly promising route to solve environmental problems caused by greenhouse effect. Ni-based catalysts have been widely investigated in CRM reactions due to their various advantages, such as high catalytic activity, low price, and abundant reserves. However, Ni-based catalysts usually suffer from rapid deactivation because of thermal sintering of metallic Ni active sites and surface coke deposition, which restricted the industrialization of Ni-based catalysts toward the CRM process. In order to address these challenges, scientists all around the world have devoted great efforts to investigating various influencing factors, such as the option of appropriate supports and promoters and the construction of strong metal-support interaction. Therefore, we carefully summarized recent development in the design and preparation of Ni-based catalysts with advanced catalytic activity and enhanced anti-coke performance toward CRM reactions in this review. Specifically, recent progresses of Ni-based catalysts with different supports, additives, preparation methods, and so on, have been summarized in detail. Furthermore, recent development of reaction mechanism studies over Ni-based catalysts was also covered by this review. Finally, it is prospected that the Ni-based catalyst supported by an ordered mesoporous framework and the combined reforming of methane will become the future development trend.

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A comparative study of dry reforming of methane over nickel catalysts supported on perovskite-type LaAlO3 and commercial α-Al2O3

Cited by 64 publications

References 66 publications

Experimental Study on Dry Reforming of Biogas for Syngas Production over Ni-Based Catalysts

Experimental Study on Dry Reforming of Biogas for Syngas Production over Ni-Based Catalysts

Porous Nickel‐Alumina Derived from Metal‐Organic Framework (MIL‐53): A New Approach to Achieve Active and Stable Catalysts in Methane Dry Reforming

Recent Progresses in the Design and Fabrication of Highly Efficient Ni-Based Catalysts With Advanced Catalytic Activity and Enhanced Anti-coke Performance Toward CO2 Reforming of Methane

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