scholarly journals Study Ni Nanoparticles on Reducible Metal Oxides (Sm2O3, CeO2, ZnO) as Catalysts for CO2 Methanation

2021 ◽  
Vol 16 (3) ◽  
pp. 641-650
Author(s):  
Athirah Ayub ◽  
Hasliza Bahruji ◽  
Abdul Hanif Mahadi
Keyword(s):  
Oxygen Vacancies ◽  
Interfacial Interaction ◽  
Co2 Conversion ◽  
Ni Nanoparticles ◽  
Co2 Methanation ◽  
Methanation Reaction ◽  
Metal Support ◽  
Reducing Environment ◽  
Open Access Article ◽  
Catalytic Performances

The activity of reducible metal oxide Sm2O3, CeO2, and ZnO as Ni nanoparticles support was investigated for CO2 methanation reaction. CO2 methanation was carried out between 200 °C to 450 °C with the optimum catalytic activity was observed at 450 °C. The reducibility of the catalysts has been comparatively studied using H2-Temperature Reduction Temperature (TPR) method. The H2-TPR analysis also elucidated the formation of surface oxygen vacancies at temperature above 600 °C for 5Ni/Sm2O3 and 5Ni/CeO2. The Sm2O3 showed superior activity than CeO2 presumably due to the transition of the crystalline phases under reducing environment. However, the formation of NiZn alloy in 5Ni/ZnO reduced the ability of Ni to catalyze methanation reaction. A highly dispersed Ni on Sm2O3 created a large metal/support interfacial interaction to give 69% of CO2 conversion with 100% selectivity at 450 °C. The 5Ni/Sm2O3 exhibited superior catalytic performances with an apparent phase transition from cubic to a mixture of cubic and monoclinic phases over a long reaction, presumably responsible for the enhanced conversion after 10 h of reaction. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 

scholarly journals Role of oxide support in Ni based catalysts for CO2 methanation

RSC Advances ◽  
2021 ◽  
Vol 11 (29) ◽  
pp. 17648-17657
Author(s):  
Ye Hwan Lee ◽  
Jeong Yoon Ahn ◽  
Dinh Duc Nguyen ◽  
Soon Woong Chang ◽  
Sung Su Kim ◽  
...  
Keyword(s):  
Co2 Methanation ◽  
Methanation Reaction ◽  
Support Interaction ◽  
Oxide Support ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Catalytic Performances

The effect of metal–support interaction and role of support on catalytic performances during Ni based CO2 methanation reaction were investigated.

scholarly journals Comparative analysis of carbon dioxide methanation technologies for low carbon society development

2020 ◽  
Author(s):  
Gheorghe Lazaroiu ◽  
Dana-Alexandra Ciupageanu ◽  
Lucian Mihaescu ◽  
Rodica-Manuela Grigoriu
Keyword(s):  
Carbon Dioxide ◽  
Conversion Rate ◽  
Renewable Energy Sources ◽  
Clean Energy ◽  
Detailed Comparison ◽  
Co2 Conversion ◽  
Low Carbon ◽  
Co2 Methanation ◽  
Synthetic Natural Gas ◽  
Methanation Reaction

Conversion technologies able to transform renewable energy sources (RES) based electricity in gaseous fuels, which can be stored over long timeframes, represent a key focus point considering the low carbon society development. Thus, Power-to-Gas technologies emerge as a viable solution to mitigate the variability of RES power generation, enabling spatial and temporal balancing of production vs. demand mismatches. An additional benefit in this context is brought by the decarbonization facilities, employing polluting carbon dioxide (CO2) emissions and RES-based electricity to produce synthetic natural gas with high methane (CH4) concentration. The fuel obtained can be stored or injected in the gas distribution infrastructure, becoming a clean energy vector. This paper investigates the functional parameters of such technologies, aiming to comparatively analyze their suitability for further integration in hybrid and ecofriendly energy systems. Given the stability of CO2 molecule, a catalyst must be used to overcome the methanation reaction kinetics limitations. Therefore, the required conditions (in terms of pressure and temperature) for CO2 methanation reaction unfolding are analyzed first. Further, CO2 conversion rate and CH4 selectivity are investigated in order to provide a detailed comparison of available technologies in the field, addressing moreover the particularities of catalyst preparation processes. It is found that Nickel (Ni) based catalysts are performing well, achieving good performances even at atmospheric pressure and low temperatures. It is remarkable that, within a [300,500]℃ temperature range, Ni-based catalysts enable a CO2 conversion rate over 78% with a CH4 selectivity of up to 100%. Last, integration perspectives and benefits are discussed, highlighting the crucial importance of the results presented in this paper.

scholarly journals Investigation on the Suitability of Engelhard Titanium Silicate as a Support for Ni-Catalysts in the Methanation Reaction

Catalysts ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1225
Author(s):  
Patrizia Frontera ◽  
Mariachiara Miceli ◽  
Francesco Mauriello ◽  
Pierantonio De Luca ◽  
Anastasia Macario
Keyword(s):  
Catalytic Performance ◽  
Titanium Content ◽  
Low Grade ◽  
Ni Catalysts ◽  
Titanium Silicate ◽  
Co2 Methanation ◽  
Methanation Reaction ◽  
Titanium Silicates ◽  
Adsorption Desorption ◽  
Catalytic Performances

Methanation reaction of carbon dioxide is currently envisaged as a facile solution for the storage and transportation of low-grade energies, contributing at the same time to the mitigation of CO2 emissions. In this work, a nickel catalyst impregnated onto a new support, Engelhard Titanium Silicates (ETS), is proposed, and its catalytic performance was tested toward the CO2 methanation reaction. Two types of ETS material were investigated, ETS-4 and ETS-10, that differ from each other in the titanium content, with Si/Ti around 2 and 3% by weight, respectively. Catalysts, loaded with 5% of nickel, were tested in the CO2 methanation reaction in the temperature range of 300–500 °C and were characterized by XRD, SEM–EDX, N2 adsorption–desorption and H2-TPR. Results showed an interesting catalytic activity of the Ni/ETS catalysts. Particularly, the best catalytic performances are showed by Ni/ETS-10: 68% CO2 conversion and 98% CH4 selectivity at T = 400 °C. The comparison of catalytic performance of Ni/ETS-10 with those obtained by other Ni-zeolites catalysts confirms that Ni/ETS-10 catalyst is a promising one for the CO2 methanation reaction.

scholarly journals Mn Modified Ni/Bsentonite for CO2 Methanation

Catalysts ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 646 ◽  
Author(s):  
Yuexiu Jiang ◽  
Tongxia Huang ◽  
Lihui Dong ◽  
Tongming Su ◽  
Bin Li ◽  
...  
Keyword(s):  
Low Temperature ◽  
Atmospheric Pressure ◽  
Oxygen Vacancies ◽  
Active Component ◽  
Average Pore Size ◽  
Space Velocity ◽  
Co2 Conversion ◽  
Co2 Methanation ◽  
Average Pore ◽  
Gas Space

To enhance the low-temperature catalytic activity and stability of Ni/bentonite catalyst, Ni-Mn/bentonite catalyst was prepared by introducing Mn into Ni/bentonite catalyst and was used for CO2 methanation. The results indicated that the addition of Mn enhanced the interaction between the NiO and the bentonite carrier, increased the dispersion of the active component Ni and decreased the grain size of the active component Ni, increased the specific surface area and pore volume of the Ni/bentonite catalyst, and decreased the average pore size, which suppressed the aggregation of Ni particles grown during the CO2 methanation process. At the same time, the Mn addition increased the amount of oxygen vacancies on the Ni/bentonite catalyst surface, which promoted the activation of CO2 in the methanation reaction, increasing the low-temperature activity and stability of the Ni/bentonite catalyst. Under the reaction condition of atmospheric pressure, 270 °C, V(H2):V(CO2) = 4, and feed gas space velocity of 3600 mL·gcat−1·h−1, the CO2 conversion on the Ni-Mn/bentonite catalyst with 2wt% Mn was 85.2%, and the selectivity of CH4 was 99.8%. On the other hand, when Mn was not added, the CO2 conversion reached 84.7% and the reaction temperature only raised to 300 °C. During a 150-h stability test, the CO2 conversion of Ni-2wt%Mn/bentonite catalyst decreased by 2.2%, while the CO2 conversion of the Ni/bentonite catalyst decreased by 6.4%.

Effects of rare earth metal doping on Au/ReZrO2 catalysts for efficient hydrogen generation from formic acid

2021 ◽  
Vol 45 (12) ◽  
pp. 5704-5711
Author(s):  
Luming Wu ◽  
Yu Hao ◽  
Shaohua Chen ◽  
Rui Chen ◽  
Pingchuan Sun ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Rare Earth ◽  
Rare Earth Metal ◽  
Oxygen Vacancies ◽  
Hydrogen Generation ◽  
Earth Metal ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Metal Doped

Rare earth metal doped ZrO2 can promote the formation of oxygen vacancies in zirconia, which enhances the metal–support interaction, finally promoting catalytic activity of FA dehydrogenation.

Modulating electrocatalytic CO2 reduction performances of bismuth nanoparticles with carbon substrates of controlled oxidation degrees

Nanoscale ◽  
2021 ◽  
Author(s):  
Si-Qian Wu ◽  
Yuchen Hao ◽  
Li-Wei Chen ◽  
Jiani Li ◽  
Zilong Yu ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Co2 Reduction ◽  
Reduction Reaction ◽  
Bismuth Nanoparticles ◽  
Carbon Substrates ◽  
Metal Support ◽  
Metal Support Interactions ◽  
Co2 Reduction Reaction ◽  
Catalytic Performances

The catalytic performances of metal nanoparticles can be widely tuned and promoted by the metal-support interactions. Here, we report that the morphologies and electrocatalytic CO2 reduction reaction (CO2RR) properties of...

Engineering the geometric and electronic structure of Ru via Ru-TiO2 interaction for enhanced selective hydrogenation

2022 ◽  
Author(s):  
Jian-guo Wang ◽  
Qiang Zhou ◽  
Zijiang Zhao ◽  
Zihao Yao ◽  
Zhongzhe Wei ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Chemical Reactions ◽  
Selective Hydrogenation ◽  
Oxygen Vacancies ◽  
Reduction Method ◽  
Support Interaction ◽  
Important Chemical ◽  
Metal Support Interaction ◽  
Metal Support

Modulation of the metal-support interaction plays a key role in many important chemical reactions. Here, by adjusting the reduction method of the catalyst and introducing oxygen vacancies in TiO2 to...

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