scholarly journals Controlling the Reconstruction of Ni/CeO2 Catalyst during Reduction for Enhanced CO Methanation

Engineering ◽  
2021 ◽  
Author(s):  
Xinyu Cao ◽  
Tiancheng Pu ◽  
Bar Mosevitzky Lis ◽  
Israel E. Wachs ◽  
Chong Peng ◽  
...  
Keyword(s):  
Co Methanation

Kinetics of carbon monoxide methanation on a Ni/SiO2 catalyst

1990 ◽  
Vol 55 (7) ◽  
pp. 1678-1685
Author(s):  
Vladimír Stuchlý ◽  
Karel Klusáček
Keyword(s):  
Carbon Monoxide ◽  
Reaction Rate ◽  
Catalyst Activity ◽  
Adsorbed Hydrogen ◽  
Reaction Products ◽  
Co Methanation ◽  
Molar Ratios ◽  
Rate Determining Step ◽  
Higher Temperature ◽  
Kinetics Of

Kinetics of CO methanation on a commercial Ni/SiO2 catalyst was evaluated at atmospheric pressure, between 528 and 550 K and for hydrogen to carbon monoxide molar ratios ranging from 3 : 1 to 200 : 1. The effect of reaction products on the reaction rate was also examined. Below 550 K, only methane was selectively formed. Above this temperature, the formation of carbon dioxide was also observed. The experimental data could be described by two modified Langmuir-Hinshelwood kinetic models, based on hydrogenation of surface CO by molecularly or by dissociatively adsorbed hydrogen in the rate-determining step. Water reversibly lowered catalyst activity and its effect was more pronounced at higher temperature.

Formation of perovskite-type LaNiO3 on La-Ni/Al2O3-ZrO2 catalysts and their performance for CO methanation

2021 ◽  
Vol 49 (2) ◽  
pp. 186-197
Author(s):  
Hong-wei WANG ◽  
Jun-xia WU ◽  
Xiao-yan WANG ◽  
Hong WANG ◽  
Jin-rong LIU
Keyword(s):  
Co Methanation ◽  
Perovskite Type

scholarly journals Influence of Ni Precursors on the Structure, Performance, and Carbon Deposition of Ni-Al2O3 Catalysts for CO Methanation

ACS Omega ◽  
2021 ◽  
Author(s):  
Wenlong Mo ◽  
Xingxiang Wang ◽  
Meng Zou ◽  
Xianjin Huang ◽  
Fengyun Ma ◽  
...  
Keyword(s):  
Carbon Deposition ◽  
Co Methanation

Effect of Fe and Co promoters on CO methanation activity of nickel catalyst prepared by impregnation – co-precipitation method

2020 ◽  
Vol 18 (5-6) ◽  
Author(s):  
Buyan-Ulzii Battulga ◽  
Tungalagtamir Bold ◽  
Enkhsaruul Byambajav
Keyword(s):  
Synergetic Effect ◽  
Space Velocity ◽  
Catalytic Performance ◽  
Precipitation Method ◽  
Molar Ratio ◽  
Alumina Support ◽  
Co Methanation ◽  
Temperature Range ◽  
Co Precipitation ◽  
Catalyst Distribution

AbstractNi based catalysts supported on γ-Al2O3 that was unpromoted (Ni/γAl2O3) or promoted (Ni–Fe/γAl2O3, Ni–Co/γAl2O3, and Ni–Fe–Co/γAl2O3) were prepared using by the impregnation – co-precipitation method. Their catalytic performances for CO methanation were studied at 3 atm with a weight hourly space velocity (WHSV) of 3000 ml/g/h of syngas with a molar ratio of H2/CO = 3 and in the temperature range between 130 and 350 °C. All promoters could improve nickel distribution, and decreased its particle sizes. It was found that the Ni–Co/γAl2O3 catalyst showed the highest catalytic performance for CO methanation in a low temperature range (<250 °C). The temperatures for the 20% CO conversion over Ni–Co/γAl2O3, Ni–Fe/γAl2O3, Ni–Fe–Co/γAl2O3 and Ni/γAl2O3 catalysts were 205, 253, 263 and 270 °C, respectively. The improved catalyst distribution by the addition of cobalt promoter caused the formation of β type nickel species which had an appropriate interacting strength with alumina support in the Ni–Co/γAl2O3. Though an addition of iron promoter improved catalyst distribution, the methane selectivity was lowered due to acceleration of both CO methanation and WGS reaction with the Ni–Fe/γAl2O3. Moreover, it was found that there was no synergetic effect from the binary Fe–Co promotors in the Ni–Fe–Co/γAl2O3 on catalytic activity for CO methanation.

Highly Efficient LaxCe1–xO2–x/2 Nanorod-Supported Nickel Catalysts for CO Methanation: Effect of La Addition

2021 ◽  
Vol 35 (4) ◽  
pp. 3307-3314
Author(s):  
Yahong Han ◽  
Jinxian Zhao ◽  
Yanhong Quan ◽  
Shunan Yin ◽  
Shiping Wu ◽  
...  
Keyword(s):  
Nickel Catalysts ◽  
Co Methanation ◽  
Highly Efficient ◽  
Supported Nickel Catalysts ◽  
La Addition

Ni/Al2O3 catalysts for CO methanation: Effect of Al2O3 supports calcined at different temperatures

2013 ◽  
Vol 22 (6) ◽  
pp. 919-927 ◽  
Author(s):  
Jiajian Gao ◽  
Chunmiao Jia ◽  
Jing Li ◽  
Meiju Zhang ◽  
Fangna Gu ◽  
...  
Keyword(s):  
Co Methanation ◽  
Different Temperatures

ChemInform Abstract: Catalysis Mechanisms of CO2and CO Methanation

ChemInform ◽  
2016 ◽  
Vol 47 (32) ◽  
Author(s):  
Bin Miao ◽  
Su Su Khine Ma ◽  
Xin Wang ◽  
Haibin Su ◽  
Siew Hwa Chan
Keyword(s):  
Co Methanation

Co methanation activity and xps studies of pd supported on zsm5 and y- zeolites

1984 ◽  
Vol 13 (1) ◽  
pp. 101-112 ◽  
Author(s):  
N.C. Saha ◽  
E.E. Wolf
Keyword(s):  
Y Zeolites ◽  
Co Methanation ◽  
Methanation Activity
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