Ni/zeolite X derived from fly ash as catalysts for CO2 methanation

Czuma, Natalia; Zarębska, Katarzyna; Motak, Monika; Gálvez, María Elena; Costa, Patrick Da

doi:10.1016/j.fuel.2020.117139

Cited by 72 publications

(35 citation statements)

References 33 publications

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“…Out of all proposed CO 2 hydrogenation reactions, e.g., methanol synthesis, higher hydrocarbons or methanation, the most developed one methanation (CO 2 + 4H 2 = CH 4 + 2H 2 O), with a few plants already operational in European Union [8,9]. The most widely studied catalysts for Sabatier's reaction in literatures are those based on group 8, 9, 10 metals-Fe, Ru, Rh, Co, Ni, or Pt [3,6,[10][11][12][13][14][15][16][17][18][19][20][21][22]. However, the most active and selective catalysts towards methane were found to be those based on Rh, Ru and Ni [6,9,10,19,[22][23][24].…”

Section: Introductionmentioning

confidence: 99%

On the effect of yttrium promotion on Ni-layered double hydroxides-derived catalysts for hydrogenation of CO2 to methane

Sun

Świrk

Wierzbicki

et al. 2021

International Journal of Hydrogen Energy

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Ni-containing mixed oxides derived from layered double hydroxides with various amounts of yttrium were synthesized by a co-precipitation method at constant pH and then obtained by thermal decomposition. The characterization techniques of XRD, elemental analysis, low-temperature N 2 sorption, H 2 -TPR, CO 2 -TPD, TGA and TPO were used on the studied catalysts. The catalytic activity of the catalysts was evaluated in the CO 2 methanation reaction performed at atmospheric pressure. The obtained results confirmed the formation of nano-sized mixed oxides after the thermal decomposition of hydrotalcites. The introduction of yttrium to Ni/Mg/Al layered double hydroxides led to a stronger interaction between nickel species and the matrix support and decreased nickel particle size as compared to the yttrium-free catalyst.The modification with Y (0.4 and 2 wt.%) had a positive effect on the catalytic performance in the moderate temperature region (250-300 °C), with CO 2 conversion increasing from 16 % for MO-0Y to 81% and 40% for MO-0.4Y and MO-2.0Y at 250 °C, respectively. The improved activity may be correlated with the increase of percentage of medium-strength basic sites, the stronger metal-support interaction, as well as decreased crystallite size of metallic nickel. High selectivity towards methane of 99% formation at 250 °C was registered for all the catalysts.

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Section: Introductionmentioning

confidence: 99%

On the effect of yttrium promotion on Ni-layered double hydroxides-derived catalysts for hydrogenation of CO2 to methane

Sun

Świrk

Wierzbicki

et al. 2021

International Journal of Hydrogen Energy

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“…Moreover, the properties of support play an important role in catalytic performance including the surface properties, the ability to disperse the active phase, and metal-support interaction. It is crucial to choose an appropriate support in preparing effective catalysts [26,27]. Many different metal oxides, such as CeO 2 [28], MgO [29], Al 2 O 3 [30], TiO 2 [31,32], SiO 2 [9,33], ZrO 2 [34][35][36][37][38], and Y 2 O 3 [39], have been used as support to promote CO 2 methanation.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Si on CO2 Methanation over Ni-xSi/ZrO2 Catalysts at Low Temperature

Wang

Zhao

et al. 2021

Catalysts

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A series of Ni-xSi/ZrO2 (x = 0, 0.1, 0.5, 1 wt%, the controlled contents of Si) catalysts with a controlled nickel content of 10 wt% were prepared by the co-impregnation method with ZrO2 as support and Si as a promoter. The effect of different amounts of Si on the catalytic performance was investigated for CO2 methanation with the stoichiometric H2/CO2 molar ratio (4/1). The catalysts were characterized by BET, XRF, H2-TPR, H2-TPD, H2-chemisorption, CO2-TPD, XRD, TEM, XPS, and TG-DSC. It was found that adding the appropriate amount of Si could improve the catalytic performance of Ni/ZrO2 catalyst at a low reaction temperature (250 °C). Among all the catalysts studied, the Ni-0.1Si/ZrO2 catalyst showed the highest catalytic activity, with H2 and CO2 conversion of 73.4% and 72.5%, respectively and the yield of CH4 was 72.2%. Meanwhile, the catalyst showed high stability and no deactivation within a 10 h test. Adding the appropriate amount of Si could enhance the interaction between Ni and ZrO2, and increase the Ni dispersion, the amounts of active sites including surface Ni0, oxygen vacancies, and strong basic sites on the catalyst surface. These might be the reasons for the high activity and selectivity of the Ni-0.1Si/ZrO2 catalyst.

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“…The performance is mainly affected by conditions such as active components and preparation methods. [19] The active component is the main reaction site in the catalytic process of the catalyst, which plays a key role in the electron transfer and the absorption and desorption of the reaction component. [20] At present, metals and metal oxides are commonly used active components.…”

Section: Introductionmentioning

confidence: 99%

“…And it shows better denitration activity after being loaded with metal active components. The performance is mainly affected by conditions such as active components and preparation methods [19] . The active component is the main reaction site in the catalytic process of the catalyst, which plays a key role in the electron transfer and the absorption and desorption of the reaction component [20] .…”

Section: Introductionmentioning

confidence: 99%

Shear Stress on the Structure Control of a Supported Fly Ash‐Based Catalyst and Its Application in SCR* Denitration

2021

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Nitrogen oxides (NOx) are one of the air pollutants, mainly from coal‐fired power plants, industrial furnaces, etc. In order to control NOx, reduce the preparation cost of denitration catalyst. Selective catalytic reduction is currently the most effective and mature technology for removing NOx. In this paper, solid waste fly ash was used as catalyst carrier, shear reactor was used to prepare Mn−Ce/FA catalyst, and successfully applied to SCR denitration. The catalyst was characterized by SEM, XRD, FTIR, XPS. The results showed that the catalyst prepared by shearing had more dispersed active components. When the power was 80 W, time was 20 min, rotation speed was 120 r/min, and the molar ratio of Mn−Ce was 1 : 1, the optimal catalyst was prepared. Under these conditions, the catalyst had the best activity and strong stability, the denitration performance was the best, up to 82.6 % within 30 min. The introduction of SO2 still showed high catalytic activity and stability, and the removal rate reduced to 73.21 %. After SO2 was stopped, the removal rate rebounded to 77.89 %. Also, Mn−Ce/FA catalyst had good cyclability and stability in the denitration process.

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Ni/zeolite X derived from fly ash as catalysts for CO2 methanation

Cited by 72 publications

References 33 publications

On the effect of yttrium promotion on Ni-layered double hydroxides-derived catalysts for hydrogenation of CO2 to methane

On the effect of yttrium promotion on Ni-layered double hydroxides-derived catalysts for hydrogenation of CO2 to methane

The Effect of Si on CO2 Methanation over Ni-xSi/ZrO2 Catalysts at Low Temperature

Shear Stress on the Structure Control of a Supported Fly Ash‐Based Catalyst and Its Application in SCR* Denitration

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