Effects of Na content in Na/Ni/SiO 2 and Na/Ni/CeO 2 catalysts for CO and CO 2 methanation

Le, Thien An; Kim, Tae Wook; Lee, Sae Ha; Park, Eun Duck

doi:10.1016/j.cattod.2017.09.031

Cited by 89 publications

(44 citation statements)

References 31 publications

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“…The main component of natural gas is methane (CH 4 ), which is characterized by cleanliness, a high calorific value, and a high energy efficiency. This is why it is considered to be an ideal energy source [1,2]. In recent years, the cost of natural gas has increased because of an increase in its demand, and many countries have taken a series of measures to deal with its tight supply.…”

Section: Introductionmentioning

confidence: 99%

Highly-Dispersed Ni-NiO Nanoparticles Anchored on an SiO2 Support for an Enhanced CO Methanation Performance

et al. 2019

Catalysts

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Highly-dispersed Ni-NiO nanoparticles was successfully anchored on an SiO2 support via a one-pot synthesis and used as heterogeneous catalysts for CO methanation. The as-obtained Ni-NiO/SiO2 catalyst possessed a high Ni content of 87.8 wt.% and exhibited a large specific surface area of 71 m2g−1 with a main pore diameter of 16.7 nm. Compared with an H2-reduced Ni-NiO/SiO2 (i.e., Ni/SiO2) catalyst, the Ni-NiO/SiO2 displayed a superior CO methanation performance. At the temperature of 350 °C, the Ni-NiO/SiO2 showed a CO conversion of 97.1% and CH4 selectivity of 81.9%, which are much better values than those of Ni/SiO2. After a 50-h stability test, the Ni-NiO/SiO2 catalyst still had an overwhelming stability retention of 97.2%, which was superior to the 72.8% value of the Ni/SiO2 catalyst.

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Section: Introductionmentioning

confidence: 99%

Highly-Dispersed Ni-NiO Nanoparticles Anchored on an SiO2 Support for an Enhanced CO Methanation Performance

et al. 2019

Catalysts

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“…CO 2 + 4H 2 → CH 4 + 2H 2 O ∆H 298 K = −164.6 0 kJ mol −1 To realize low temperature CO 2 methanation, various catalysts have been designed, developed, and tested for their catalytic activity at a low temperature. Many metal catalysts, such as supported Rh [5,6], Ru [7], Pd [8], Co [9][10][11], and Ni [12][13][14] catalysts, have been developed for CO 2 methanation. Among the reported catalysts, supported Ni-based catalysts have been intensively studied due to their low price and high levels of activity.…”

Section: Introductionmentioning

confidence: 99%

Highly Loaded Mesoporous Ni–La2O3 Catalyst Prepared by Colloidal Solution Combustion Method for CO2 Methanation

et al. 2019

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Highly dispersed Ni-based catalysts for CO2 methanation have been extensively studied over the last decade. However, a highly loaded Ni-based catalyst always results in a large Ni particle size and poor CO2 methanation activity. In this work, a colloidal solution combustion method was used to prepare a highly loaded Ni–La2O3 catalyst (50 wt % Ni) with a small Ni particle size and abundant metal–support interface. The characterizations demonstrated that a Ni–La2O3 catalyst prepared in this way has a mesoporous structure and a small Ni particle size. Due to the small Ni particle size and abundant metal–support interface, the highly loaded mesoporous Ni–La2O3 catalyst exhibits higher activity and selectivity in CO2 methanation compared to the Ni–La2O3 catalyst prepared by a conventional solution combustion method.

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“…Thus, possible ways for suppressing carbon deposition would include enhancing the rate of hydrogenation gasification and decreasing the rate of CO disproportionation. Tuning the acidic-basic properties of nickel catalysts with alkali cations like Na + and K + [13,14] and alkaline earth metal oxides like MgO [12] has demonstrated efficiency on improving the anti-coking capability during methanation reaction. Improving the dispersion of nickel with rare earth metal oxide like CeO 2 is also helpful [15] .…”

Section: Introductionmentioning

confidence: 99%

Coke-resistant Au–Ni/MgAl2O4 catalyst for direct methanation of syngas

Wang

Zhang

et al. 2019

Journal of Energy Chemistry

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Effects of Na content in Na/Ni/SiO 2 and Na/Ni/CeO 2 catalysts for CO and CO 2 methanation

Cited by 89 publications

References 31 publications

Highly-Dispersed Ni-NiO Nanoparticles Anchored on an SiO2 Support for an Enhanced CO Methanation Performance

Highly-Dispersed Ni-NiO Nanoparticles Anchored on an SiO2 Support for an Enhanced CO Methanation Performance

Highly Loaded Mesoporous Ni–La2O3 Catalyst Prepared by Colloidal Solution Combustion Method for CO2 Methanation

Coke-resistant Au–Ni/MgAl2O4 catalyst for direct methanation of syngas

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