Effects of alkaline earth promoters on the catalytic performance of the nickel catalysts supported on high surface area mesoporous magnesium silicate in dry reforming reaction

Ghods, Bahare; Meshkani, Fereshteh; Rezaei, Mehran

doi:10.1016/j.ijhydene.2016.10.020

Cited by 37 publications

(10 citation statements)

References 43 publications

(52 reference statements)

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“…The SBET decreased to 198, 193, and 193 m 2 g -1 and the pore volume was reduced to 0.63, 0.53, and 0.56 cm 3 g -1 after modification with Na2CO3, NaHCO3, and NaOH, respectively (Table 2, entries 2-4). It can be explained by the fact that the addition of Na species occupied a small number of pores [50]. In summary, the diversification in these structural parameters was too little to be considered as the factor deciding the catalytic performance.…”

Section: Analysis Of Catalytic Activity Differencesmentioning

confidence: 99%

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Study of the role of alkaline sodium additive in selective hydrogenation of phenol

Chen

Kong

Mao

et al. 2019

Chinese Journal of Catalysis

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Section: Analysis Of Catalytic Activity Differencesmentioning

confidence: 99%

“…Second, the addition of promoters affects the acid-base sites of the supports, and thus changes the adsorption/desorption equilibrium of the reaction species [6,18,[46][47][48][49]. Third, they enhance the dispersion of active components and stability of the catalysts [7,46,50,72,73].…”

Section: Introductionmentioning

confidence: 99%

Study of the role of alkaline sodium additive in selective hydrogenation of phenol

Chen

Kong

Mao

et al. 2019

Chinese Journal of Catalysis

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“…Besides Al 2 O 3 , other supports were also explored. As an inert support, SiO 2 has a weak interaction with Ni, leading to relatively weak metal‐support interaction and are less stable and less active compared to mildly acidic (Al 2 O 3 ) and basic (La 2 O 3 , CeO 2 ) supports . However, the high dispersion of Ni nanoparticles in nanochannels of cerium‐modified silica aerogels or in mesoporous silica can improve the catalytic activity and thermal stability .…”

Section: Dry Reforming Of Methanementioning

confidence: 99%

Advances in catalytic conversion of methane and carbon dioxide to highly valuable products

Cai

2019

Energy Science & Engineering

121

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Two typical processes have been developed for the conversion of methane and carbon dioxide to higher valuable products: dry reforming of methane (DRM) and CO2‐oxidative coupling of methane (CO2‐OCM). Numerous articles reviewed progresses in either DRM or CO2‐OCM, but no one covers both processes. In this review article, we systematically evaluated progresses in both DRM and CO2‐OCM processes for conversion of methane and CO2 to highly valuable products. Critical issues, which are carbon deposition and high energy cost for DRM and the contradiction between large activity and high selectivity for CO2‐OCM, were emphasized. Strategies to develop effective catalysts were evaluated, including the enhancement of metal‐support interactions, the introduction of promotors, the formation of solid solutions, and the construction of core‐shell structures. Plasma and photocatalysis were discussed as new promising technologies for DRM and CO2‐OCM.

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“…The application of chromium compounds for environmentally friendly selective oxidation reactions in the liquid or gas phases depends on the adhesion to specific catalyst supports. In addition, the nature of the catalyst support affects the performance, application, and properties of catalysts [ 22 , 23 ]. There are a lot of requirements for catalyst supports, but the high surface area and thermal stability are some of the most important ones.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, Thermal Stability, and Catalytic Activity of Compounds Formed in CaO-SiO2-Cr(NO3)3-H2O System

et al. 2020

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In this work, the thermal stability, microstructure, and catalytic activity in oxidation reactions of calcium silicate hydrates formed in the CaO-SiO2-Cr(NO3)3-H2O system under hydrothermal conditions were examined in detail. Dry primary mixture with a molar ratio of CaO/SiO2 = 1.5 was mixed with Cr(NO3)3 solution (c = 10 g Cr3+/dm3) to reach a solution/solid ratio of the suspension of 10.0:1. Hydrothermal synthesis was carried out in unstirred suspensions at 175 °C for 16 h. It was determined that, after treatment, semicrystalline calcium silicate hydrates C-S-H(I) and/or C-S-H(II) with incorporated Cr3+ ions (100 mg/g) were formed. The results of in situ X-ray diffraction and simultaneous thermal analyses showed that the products were stable until 500 °C, while, at higher temperatures, they recrystallized to calcium chromate (CaCrO4, 550 °C) and wollastonite (800–850 °C). It was determined that both the surface area and the shape of the dominant pore changed during calcination. Propanol oxidation experiments showed that synthetic semicrystalline calcium silicate hydrates with intercalated chromium ions are able to exchange oxygen during the heterogeneous oxidation process. The obtained results were confirmed by XRD, STA, FT-IR, TEM, SEM, and BET methods, and by propanol oxidation experiments.

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Effects of alkaline earth promoters on the catalytic performance of the nickel catalysts supported on high surface area mesoporous magnesium silicate in dry reforming reaction

Abstract: 10% Ni-MgSiO 3 10% Ni/1% MgO-MgSiO 3 10% Ni/3% MgO-MgSiO 3 10% Ni/6% MgO-MgSiO 3 TPO analysis MgO promoted catalysts exhibited higher catalytic activity and lower carbon formation compared to unpromoted catalyst in dry reforming reaction

Cited by 37 publications

References 43 publications

Study of the role of alkaline sodium additive in selective hydrogenation of phenol

Study of the role of alkaline sodium additive in selective hydrogenation of phenol

Advances in catalytic conversion of methane and carbon dioxide to highly valuable products

Microstructure, Thermal Stability, and Catalytic Activity of Compounds Formed in CaO-SiO2-Cr(NO3)3-H2O System

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