Synthesis of highly coke resistant Ni nanoparticles supported MgO/ZnO catalyst for reforming of methane with carbon dioxide

Singha, Rajib Kumar; Yadav, Aditya; Agrawal, Ayush; Shukla, Anurag; Adak, Shubhadeep; Sasaki, Takehiko; Bal, Rajaram

doi:10.1016/j.apcatb.2016.03.029

Cited by 150 publications

(71 citation statements)

References 87 publications

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“…In our recent report, we have explored high catalytic activity of MgO promoted Ni‐ZnO catalyst for DRM. Here, we are reporting a comparative study of CeO 2 and MgO promoted Ni‐ZnO catalyst for DRM, prepared by modifying two reported methods . for BET‐surface area of the prepared catalysts was measured and is shown in Table .…”

Section: Resultsmentioning

confidence: 71%

“…The nickel dispersion also found to be increased after CeO 2 or MgO doping. The reason may be that the formation of smaller catalyst particles increased the surface area of the CeO 2 or MgO promoted Ni‐ZnO catalysts, which was also evident from the SEM and TEM analysis (discussed latter). Nickel dispersion measured by H 2 ‐chemisorption method showed high dispersion of CeO 2 and MgO promoted Ni‐ZnO catalyst, which is also a very good indication of high metal support interaction .…”

Section: Resultsmentioning

confidence: 71%

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Promoting Effect of CeO₂and MgO for CO₂Reforming of Methane over Ni-ZnO Catalyst

et al. 2016

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The purpose of this study was to find out the effect of CeO2 and MgO (as a promoter) on CO2 reforming of methane or dry reforming of methane (DRM) for the production of synthesis gas. In this aspect, CeO2 and MgO promoted Ni‐nanoparticles supported ZnO catalyst was prepared by surfactant induced hydrothermal method, using cetyltrimethylammonium bromide (CTAB) as surfactant, morphology controlling agent and polyvinylpyrrolidone (PVP) as size controlling agent. The prepared catalysts were characterized by BET‐Surface area, X‐ray diffraction study (XRD), Scanning Electron Microscropy (SEM), Transmission Electron Microscopy (SEM), Inductively coupled plasma atomic emission spectroscopy (ICPAES), Temperature Programmed Reduction (TPR), X‐ray Photoelectron Spectroscopy (XPS) and Thermogravimetric Analysis (TGA) techniques. Highly basic nature of MgO and excellent redox properties of CeO2 increased nickel dispersion and created strong metal‐support interaction, which effectively reduced the coke deposition on the catalyst surface. MgO promoted Ni‐ZnO catalyst showed better low temperature activity compared to CeO2 promoted Ni‐ZnO catalyst for DRM and Ni‐MgO/ZnO catalyst also exhibited better coke resistivity, because of comparatively smaller nickel nanoparticles. Both the promoted catalysts showed more than 24 h of time on stream (TOS) stability at 800 °C without any significant deactivation of the catalysts. The catalysts produced H2/CO ratio 0.99 at 800 °C during the TOS.

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Section: Resultsmentioning

confidence: 71%

Section: Resultsmentioning

confidence: 71%

Promoting Effect of CeO₂and MgO for CO₂Reforming of Methane over Ni-ZnO Catalyst

et al. 2016

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“…10). The conversion of reactants and selectivity of the products was dependent on number of active sites, size of the active metal (Ni) and the reducibility of the active (Ni) species [59,60,66,[73][74][75][76]. With increasing wt% of Ni loading Ni dispersion was increased upto 3.0 wt% Ni but above that the Ni dispersion was found to be decreasing.…”

Section: Effect Of Ni Loadingmentioning

confidence: 99%

Energy efficient methane tri-reforming for synthesis gas production over highly coke resistant nanocrystalline Ni–ZrO2 catalyst

et al. 2016

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“…It has been reported previously that the metallic Ni dispersion extent of a supported Ni catalyst generally determines its reaction performance . Therefore, the active metallic Ni surface areas of the fresh and spent Ni/La 2 O 3 samples were determined by H 2 adsorption‐desorption after reduction.…”

Section: Resultsmentioning

confidence: 99%

Ni/La₂O₃ Catalysts for Dry Reforming of Methane: Insights into the Factors Improving the Catalytic Performance

Liu

Zhang

et al. 2019

ChemCatChem

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To understand the structure‐reactivity relationship of Ni/La2O3, and eventually get more applicable catalysts for DRM, glycine nitrate combustion (GNC), precipitation (PP) and thermal decomposition (TD) methods have been used to prepare La2O3 supports. Although all the supports possess a hexagonal La2O3 phase, their bulk and surface properties are significantly changed. By using them as supports, the interactions between NiO/Ni and La2O3 are varied, thus achieving Ni/La2O3 catalysts with different activity, stability and anti‐coking ability, which follow the order of 5Ni/La2O3‐GNC>5Ni/La2O3‐PP>5Ni/La2O3‐TD. On La2O3 having a higher surface area, a catalyst with a higher active metallic Ni surface area can be achieved. Therefore, the interfaces between Ni and La2O2CO3 can be enlarged, which effectively facilitates the reaction between carbon deposits and the La2O2CO3 formed during the DRM, thus preventing the accumulation of both and keeping the catalyst surface clean, active and stable. In addition, the amount of surface alkaline and active oxygen sites of the reduced catalysts obey the order of 5Ni/La2O3‐GNC>5Ni/La2O3‐PP>5Ni/La2O3‐TD, which is well consistent with the reaction performance. Therefore, these two factors are also believed to be critical to decide the reaction performance. It is concluded that Ni/La2O3 catalysts with high activity, stability and potent anti‐coking ability for DRM can be achieved by preparing catalysts with high Ni dispersion.

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Synthesis of highly coke resistant Ni nanoparticles supported MgO/ZnO catalyst for reforming of methane with carbon dioxide

Cited by 150 publications

References 87 publications

Promoting Effect of CeO₂and MgO for CO₂Reforming of Methane over Ni-ZnO Catalyst

Promoting Effect of CeO₂and MgO for CO₂Reforming of Methane over Ni-ZnO Catalyst

Energy efficient methane tri-reforming for synthesis gas production over highly coke resistant nanocrystalline Ni–ZrO2 catalyst

Ni/La₂O₃ Catalysts for Dry Reforming of Methane: Insights into the Factors Improving the Catalytic Performance

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Synthesis of highly coke resistant Ni nanoparticles supported MgO/ZnO catalyst for reforming of methane with carbon dioxide

Cited by 150 publications

References 87 publications

Promoting Effect of CeO2and MgO for CO2Reforming of Methane over Ni-ZnO Catalyst

Promoting Effect of CeO2and MgO for CO2Reforming of Methane over Ni-ZnO Catalyst

Energy efficient methane tri-reforming for synthesis gas production over highly coke resistant nanocrystalline Ni–ZrO2 catalyst

Ni/La2O3 Catalysts for Dry Reforming of Methane: Insights into the Factors Improving the Catalytic Performance

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Product

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Promoting Effect of CeO₂and MgO for CO₂Reforming of Methane over Ni-ZnO Catalyst

Promoting Effect of CeO₂and MgO for CO₂Reforming of Methane over Ni-ZnO Catalyst

Ni/La₂O₃ Catalysts for Dry Reforming of Methane: Insights into the Factors Improving the Catalytic Performance