Multi-Ni@Ni phyllosilicate hollow sphere for CO2 reforming of CH4: influence of Ni precursors on structure, sintering, and carbon resistance

2018 ◽  
Vol 8 (7) ◽  
pp. 1915-1922 ◽  
Author(s):  
Ziwei Li ◽  
Sibudjing Kawi
Keyword(s):  
Pore Structure ◽  
Strong Interaction ◽  
Hollow Sphere ◽  
Reduction Method ◽  
Carbon Deposition ◽  
Hollow Spheres ◽  
Catalytic Performance ◽  
Co2 Reforming ◽  
Co2 Reforming Of Ch4 ◽  
Excellent Catalytic Performance

Multi-Ni@Ni phyllosilicate hollow spheres synthesized with Ni(acac)2 precursor via hydrothermal and H2 reduction method have unique pore structure and strong interaction between Ni and Ni phyllosilicate which help prevent Ni sintering and carbon deposition, yielding excellent catalytic performance for CO2 reforming of CH4 reaction.

scholarly journals CO2 Reforming of CH4 Using Coke Oven Gas over Ni/MgO-Al2O3 Catalysts: Effect of the MgO:Al2O3 Ratio

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1468
Author(s):  
Ho-Ryong Park ◽  
Beom-Jun Kim ◽  
Yeol-Lim Lee ◽  
Seon-Yong Ahn ◽  
Kyoung-Jin Kim ◽  
...  
Keyword(s):  
Carbon Deposition ◽  
Active Material ◽  
Coke Oven ◽  
Catalytic Performance ◽  
Ni Catalyst ◽  
Coke Oven Gas ◽  
Co2 Reforming ◽  
Co2 Reforming Of Ch4 ◽  
Supported Ni Catalyst ◽  
Al2o3 Catalyst

Research is being actively conducted to improve the carbon deposition and sintering resistance of Ni-based catalysts. Among them, the Al2O3-supported Ni catalyst has been broadly studied for the dry reforming reaction due to its high CH4 activity at the beginning of the reaction. However, there is a problem of deactivation due to carbon deposition of Ni/Al2O3 catalyst and sintering of Ni, which is a catalytically active material. Supplementing MgO in Ni/Al2O3 catalyst can result in an improved MgAl2O4 spinel structure and basicity, which can be helpful for the activation of methane and carbon dioxide molecules. In order to confirm the optimal supports’ ratio in Ni/MgO-Al2O3 catalysts, the catalysts were prepared by supporting Ni after controlling the MgO:Al2O3 ratio stepwise, and the prepared catalysts were used for CO2 reforming of CH4 (CDR) using coke oven gas (COG). The catalytic reaction was conducted at 800 °C and at a high gas hourly space velocity (GHSV = 1,500,000 h−1) to screen the catalytic performance. The Ni/MgO-Al2O3 (MgO:Al2O3 = 3:7) catalyst showed the best catalytic performance between prepared catalysts. From this study, the ratio of MgO:Al2O3 was confirmed to affect not only the basicity of the catalyst but also the dispersion of the catalyst and the reducing property of the catalyst surface.

scholarly journals Pd–Ni Bimetallic Nanoparticles Supported on Zro2 as an Efficient Catalyst for Suzuki–Miyaura Reactions

2018 ◽  
Vol 42 (8) ◽  
pp. 419-423
Author(s):  
Li-Jie Zhang ◽  
Xian Yao ◽  
Ying-xin Sun ◽  
Jia-wei Zhang ◽  
Chun Cai
Keyword(s):  
Reduction Method ◽  
Bimetallic Nanoparticles ◽  
Bimetallic Catalyst ◽  
Cross Coupling ◽  
Catalytic Performance ◽  
Coupling Reactions ◽  
Efficient Catalyst ◽  
Mild Conditions ◽  
Cross Coupling Reactions ◽  
Excellent Catalytic Performance

Pd–Ni bimetallic nanoparticles (BMNPs) supported on ZrO2 were prepared by an impregnation–reduction method. The BMNPs showed excellent catalytic performance in Suzuki carbon–carbon cross-coupling reactions and almost quantitative conversion of the substrates was obtained under mild conditions in the absence of ligand. The excellent catalytic performance of the bimetallic catalyst could be a result of the synergistic effect between the two metal components. The catalyst showed outstanding recyclability during the reaction process; no obvious decrease in catalytic performance was observed after five cycles.

Hierarchical flower-like Bi2WO6 hollow microspheres: facile synthesis and excellent catalytic performance

RSC Advances ◽  
2015 ◽  
Vol 5 (29) ◽  
pp. 23080-23085 ◽  
Author(s):  
Peigen Zhang ◽  
Jian Zhang ◽  
Anjian Xie ◽  
Shikuo Li ◽  
Jiming Song ◽  
...  
Keyword(s):  
Hollow Spheres ◽  
Catalytic Performance ◽  
Hollow Microspheres ◽  
Solvothermal Process ◽  
Facile Synthesis ◽  
Step Method ◽  
Bismuth Tungstate ◽  
One Step ◽  
Excellent Catalytic Performance

A one step method has been developed for the fabrication of hierarchical flower-like bismuth tungstate (Bi2WO6) hollow spheres via a solvothermal process.

The effect of preparation method on the catalytic performance over superior MgO-promoted Ni–Ce0.8Zr0.2O2 catalyst for CO2 reforming of CH4

2013 ◽  
Vol 38 (31) ◽  
pp. 13649-13654 ◽  
Author(s):  
Dae-Woon Jeong ◽  
Won-Jun Jang ◽  
Jae-Oh Shim ◽  
Hyun-Seog Roh ◽  
In Hyuk Son ◽  
...  
Keyword(s):  
Preparation Method ◽  
Catalytic Performance ◽  
Co2 Reforming ◽  
Co2 Reforming Of Ch4

Carbon Dioxide Reforming of Methane over Ni/Mo/La2O3-SBA-15 Сatalyst

2012 ◽  
Vol 455-456 ◽  
pp. 960-965
Author(s):  
Jian Huang ◽  
T. Huang ◽  
A. Rongzhang ◽  
Wei Huang ◽  
Ren Xiong Ma
Keyword(s):  
Carbon Dioxide ◽  
Strong Interaction ◽  
Carbon Deposition ◽  
Catalytic Performance ◽  
Stability Test ◽  
X Ray Diffraction ◽  
Carbon Dioxide Reforming ◽  
X Ray ◽  
Long Term Stability

Carbon dioxide reforming of methane over Ni/Mo/ La2O3-SBA-15 was studied. The catalyst was characterized by N2 adsorption, X-ray diffraction, H2-TPR,CO2-TPD and TG-GTA analysis. The results indicated that the introduction of an appropriate amount of La2O3 exhibited a higher activity and stability. In the long term stability test, La2O3 impregnated Ni/Mo-SBA-15 gave the highest conversion and stable activity at 800°C for 250 h. The effect of La was suggested to be due to its lower tendency to carbon deposition. Characterization results showed a strong interaction between La and Mo or Ni which facilitated the improvement of catalytic performance.

Catalytic performance of reduced La2−xSrxNiO4 perovskite-like oxides for CO2 reforming of CH4

2004 ◽  
Vol 263 (1) ◽  
pp. 1-9 ◽  
Author(s):  
J Rynkowski ◽  
P Samulkiewicz ◽  
A.K Ladavos ◽  
P.J Pomonis
Keyword(s):  
Catalytic Performance ◽  
Co2 Reforming ◽  
Co2 Reforming Of Ch4

Significant roles of mesostructure and basic modifier for ordered mesoporous Ni/CaO–Al2O3 catalyst towards CO2 reforming of CH4

2014 ◽  
Vol 4 (6) ◽  
pp. 1759-1770 ◽  
Author(s):  
Leilei Xu ◽  
Zhichao Miao ◽  
Huanling Song ◽  
Wei Chen ◽  
Lingjun Chou
Keyword(s):  
Catalytic Performance ◽  
Dry Reforming ◽  
Co2 Reforming ◽  
Co2 Reforming Of Ch4 ◽  
Ordered Mesoporous ◽  
Al2o3 Catalyst

The significant roles of mesostructure and basic modifier in improving the catalytic performance of dry reforming were investigated.

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