scholarly journals Ni nanocatalysts supported on mesoporous Al2O3–CeO2 for CO2 methanation at low temperature

RSC Advances ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 2067-2072 ◽  
Author(s):  
Yushan Wu ◽  
Jianghui Lin ◽  
Guangyuan Ma ◽  
Yanfei Xu ◽  
Jianli Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Oxygen Vacancies ◽  
Metallic Nickel ◽  
Co2 Methanation ◽  
Composite Catalysts

The addition of CeO2 to form Ni composite catalysts increased the oxygen vacancies and active metallic nickel sites thus improving the low temperature CO2 methanation performance.

Fabrication of surface oxygen vacancies on NiMnAl-LDO catalyst by high-shear mixer-assisted preparation for low-temperature CO2 methanation

Fuel ◽  
2022 ◽  
Vol 309 ◽  
pp. 122099
Author(s):  
Junming Zeng ◽  
Yongkang Sun ◽  
Jie Zhang ◽  
Zhouxin Chang ◽  
Jun Yang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Oxygen Vacancies ◽  
High Shear ◽  
Surface Oxygen ◽  
Co2 Methanation

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%.

scholarly journals Improvement of Ni/Al2O3 Catalysts for Low-Temperature CO2 Methanation by Vanadium and Calcium Oxide Addition

2021 ◽  
Author(s):  
Gabriella Garbarino ◽  
Paweł Kowalik ◽  
Paola Riani ◽  
Katarzyna Antoniak-Jurak ◽  
Piotr Pieta ◽  
...  
Keyword(s):  
Low Temperature ◽  
Calcium Oxide ◽  
Co2 Methanation ◽  
Oxide Addition

scholarly journals Bimetallic Ni-Based Catalysts for CO2 Methanation: A Review

Nanomaterials ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 28
Author(s):  
Anastasios I. Tsiotsias ◽  
Nikolaos D. Charisiou ◽  
Ioannis V. Yentekakis ◽  
Maria A. Goula
Keyword(s):  
Low Temperature ◽  
Noble Metals ◽  
Recent Progress ◽  
Low Cost ◽  
Alloy Formation ◽  
Co2 Methanation ◽  
High Performing ◽  
Mobile Sources ◽  
Low Dispersion ◽  
Made In

CO2 methanation has recently emerged as a process that targets the reduction in anthropogenic CO2 emissions, via the conversion of CO2 captured from point and mobile sources, as well as H2 produced from renewables into CH4. Ni, among the early transition metals, as well as Ru and Rh, among the noble metals, have been known to be among the most active methanation catalysts, with Ni being favoured due to its low cost and high natural abundance. However, insufficient low-temperature activity, low dispersion and reducibility, as well as nanoparticle sintering are some of the main drawbacks when using Ni-based catalysts. Such problems can be partly overcome via the introduction of a second transition metal (e.g., Fe, Co) or a noble metal (e.g., Ru, Rh, Pt, Pd and Re) in Ni-based catalysts. Through Ni-M alloy formation, or the intricate synergy between two adjacent metallic phases, new high-performing and low-cost methanation catalysts can be obtained. This review summarizes and critically discusses recent progress made in the field of bimetallic Ni-M (M = Fe, Co, Cu, Ru, Rh, Pt, Pd, Re)-based catalyst development for the CO2 methanation reaction.

Ceria imparts superior low temperature activity to nickel catalysts for CO2 methanation

2019 ◽  
Vol 9 (20) ◽  
pp. 5636-5650 ◽  
Author(s):  
Xinpeng Guo ◽  
Hongyan He ◽  
Atsadang Traitangwong ◽  
Maoming Gong ◽  
Vissanu Meeyoo ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Low Temperature ◽  
Nickel Catalysts ◽  
Co2 Methanation

Proposed reaction mechanism for CO2 methanation on NiAl-MO/CeO2-x catalysts.

Highly active PdCeOx composite catalysts for low-temperature CO oxidation, prepared by plasma-arc synthesis

2014 ◽  
Vol 147 ◽  
pp. 132-143 ◽  
Author(s):  
R.V. Gulyaev ◽  
E.M. Slavinskaya ◽  
S.A. Novopashin ◽  
D.V. Smovzh ◽  
A.V. Zaikovskii ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Plasma Arc ◽  
Composite Catalysts ◽  
Highly Active ◽  
Low Temperature Co Oxidation
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