Nanoparticles-in-concavities as efficient nanocatalysts for carbon dioxide reforming of methane to hydrogen and syngas

2016 ◽  
Vol 6 (12) ◽  
pp. 4565-4576 ◽  
Author(s):  
Jie Deng ◽  
Wei Chu ◽  
Bo Wang ◽  
Zhenxin Xu ◽  
Wen Yang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Active Sites ◽  
Dry Reforming ◽  
Carbon Dioxide Reforming ◽  
Methane Dry Reforming ◽  
Nanoparticle Catalysts ◽  
Catalytic Performances

The ceria concavity-loaded Ni nanoparticle catalysts can lead to more active sites and promote CO2 dissociative activation and CO desorption, thus enhancing significantly the catalytic performances for methane dry reforming with CO2.

scholarly journals Evaluation of a Catalyst Durability in Absence and Presence of Toluene Impurity: Case of the Material Co2Ni2Mg2Al2 Mixed Oxide Prepared by Hydrotalcite Route in Methane Dry Reforming to Produce Energy

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1362
Author(s):  
Carole Tanios ◽  
Cédric Gennequin ◽  
Madona Labaki ◽  
Haingomalala Lucette Tidahy ◽  
Antoine Aboukaïs ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Mixed Oxide ◽  
Active Sites ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Side Reactions ◽  
Commercial Catalyst ◽  
Catalytic Sites ◽  
Catalyst Durability ◽  
Catalytic Performances

Ni, Co, Mg, and Al mixed-oxide solids, synthesized via the hydrotalcite route, were investigated in previous works toward the dry reforming of methane for hydrogen production. The oxide Co2Ni2Mg2Al2 calcined at 800 °C, Co2Ni2Mg2Al2800, showed the highest catalytic activity in the studied series, which was ascribable to an interaction between Ni and Co, which is optimal for this Co/Ni ratio. In the present study, Co2Ni2Mg2Al2800 was compared to a commercial catalyst widely used in the industry, Ni(50%)/Al2O3, and showed better activity despite its lower number of active sites, as well as lower amounts of carbon on its surface, i.e. less deactivation. In addition to this, Co2Ni2Mg2Al2800 showed stability for 20 h under stream during the dry reforming of methane. This good durability is attributed to a periodic cycle of carbon deposition and removal as well as to the strong interaction between Ni and Co, preventing the deactivation of the catalyst. The evaluation of the catalytic performances in the presence of toluene, which is an impurity that exists in biogas, is also a part of this work. In the presence of toluene, the catalytic activity of Co2Ni2Mg2Al2800 decreases, and higher carbon formation on the catalyst surface is detected. Toluene adsorption on catalytic sites, side reactions performed by toluene, and the competition between toluene and methane in the reaction with carbon dioxide are the main reasons for such results.

Effect of a second metal (Co, Cu, Mn or Zr) on nickel catalysts derived from hydrotalcites for the carbon dioxide reforming of methane

RSC Advances ◽  
2016 ◽  
Vol 6 (74) ◽  
pp. 70537-70546 ◽  
Author(s):  
Xiaopeng Yu ◽  
Fubao Zhang ◽  
Wei Chu
Keyword(s):  
Carbon Dioxide ◽  
Nickel Catalysts ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Ni Catalyst ◽  
Carbon Dioxide Reforming ◽  
Enhanced Stability

NiCo and NiCu catalysts exhibited enhanced stability compared with a Ni catalyst for the dry reforming of methane. On the contrary, NiMn and NiZr catalysts decreased the reforming stability.

scholarly journals The Effect of Preparation Method of Ni-Supported SiO2 Catalysts for Carbon Dioxide Reforming of Methane

Catalysts ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1221
Author(s):  
Hua-Ping Ren ◽  
Si-Yi Ding ◽  
Qiang Ma ◽  
Wen-Qi Song ◽  
Yu-Zhen Zhao ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Particle Size ◽  
Active Sites ◽  
High Performance ◽  
Preparation Method ◽  
Complexing Agent ◽  
Preparation Process ◽  
Carbon Dioxide Reforming ◽  
Preparation Methods ◽  
Synthetic Strategy

Reforming methane to produce syngas is a subject that generates considerable interest. The process requires catalysts that possess high-performance active sites to activate stable C–H bonds. Herein, we report a facile synthetic strategy to prepare Ni-based catalysts by complexation–impregnation (Ni-G/SiO2-C) and precipitation–impregnation (Ni-G/SiO2-P) methods using glycine as a complexing agent. The particle size of Ni in both types of catalysts is decreased by adding glycine in the preparation process. Nevertheless, the preparation methods and amount of glycine play a significant role in the particle size and distribution of Ni over the Ni-based catalysts. The smaller particle size and narrower distribution of Ni were obtained in the Ni-G/SiO2-P catalyst. The catalysts were comparatively tested for carbon-dioxide reforming of methane (CDR). Ni-G/SiO2-P showed better CDR performance than Ni-G/SiO2-C and Ni/SiO2 and increased stability because of the smaller particle size and narrower distribution of Ni. Moreover, a high-performance Ni-based catalyst was prepared by optimizing the amount of glycine added. An unobservable deactivation was obtained over Ni-G-2/SiO2-P and Ni-G-3/SiO2-P for CDR during TOS = 20 h. Thus, a new promising method is described for the preparation of Ni-based catalysts for CDR.

scholarly journals Effect of pore geometry of mesoporous supports on catalytic performances in methane reforming

2018 ◽  
Vol 171 ◽  
pp. 01003
Author(s):  
Joy Tannous ◽  
Leila Karam ◽  
Marie-Nour Kaydouh ◽  
Henri El Zakhem ◽  
Nissrine El Hassan ◽  
...  
Keyword(s):  
Coke Formation ◽  
Three Dimensional ◽  
Dry Reforming ◽  
Methane Reforming ◽  
X Ray Diffraction ◽  
Methane Dry Reforming ◽  
X Ray ◽  
Spent Catalysts ◽  
Temperature Programmed ◽  
Catalytic Performances

Catalysts prepared using three dimensional SBA-16 silica support (composed of micropores and cage-like mesopores) were tested in the reaction of methane dry reforming, in comparison with 2D hexagonal mesoporous SBA-15 support. The samples were evaluated by N2 sorption and X-Ray diffraction (XRD) for the assessment of their textural and structural properties. The reducibility was characterized by temperature programmed reduction (TPR). The catalytic performances were evaluated in methane dry reforming and spent catalysts (after reaction) were characterized for the evaluation of sintering and coke formation by TPH/MS, XRD and HR-TEM.

Methane dry reforming catalyst prepared by the co-deflagration of high-nitrogen energetic complexes

2019 ◽  
Vol 7 (1) ◽  
pp. 141-149 ◽  
Author(s):  
Moran Dahan ◽  
Eswaravara Komarala ◽  
Ludmila Fadeev ◽  
Ajay K. Chinnam ◽  
Avital Shlomovich ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Dry Reforming ◽  
High Nitrogen ◽  
Synthetic Fuels ◽  
Methane Dry Reforming ◽  
Energy Applications ◽  
Reforming Catalyst

Methane dry reforming presents a unique opportunity to simultaneously consume both methane and carbon dioxide and generate from them clean-burning synthetic fuels for mobile energy applications.

Toward enhanced conversion of model biogas mixtures: parametric tuning and mechanistic study for ceria–zirconia supported nickel–cobalt catalyst

2014 ◽  
Vol 4 (5) ◽  
pp. 1340-1349 ◽  
Author(s):  
M. S. Aw ◽  
I. G. Osojnik Črnivec ◽  
A. Pintar
Keyword(s):  
Carbon Dioxide ◽  
Cobalt Catalyst ◽  
Dry Reforming ◽  
Mechanistic Study ◽  
Methane Dry Reforming ◽  
Nickel Cobalt

This work underlines the parametric tuning and mechanistic study for CeZr supported bimetallic NiCo in methane dry reforming with carbon dioxide.

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