scholarly journals Nanostructured Nickel Aluminate as a Key Intermediate for the Production of Highly Dispersed and Stable Nickel Nanoparticles Supported within Mesoporous Alumina for Dry Reforming of Methane

Molecules ◽  
2019 ◽  
Vol 24 (22) ◽  
pp. 4107 ◽  
Author(s):  
Leila Karam ◽  
Julien Reboul ◽  
Nissrine El Hassan ◽  
Jaysen Nelayah ◽  
Pascale Massiani
Keyword(s):  
Nickel Nanoparticles ◽  
Intermediate Formation ◽  
Dry Reforming ◽  
Mesoporous Alumina ◽  
Dry Reforming Of Methane ◽  
One Pot ◽  
Nickel Aluminate ◽  
High Nickel ◽  
Complementary Techniques ◽  
Nickel Dispersion

Two routes of preparation of mesoporous Ni-alumina materials favoring the intermediate formation of nanostructured nickel-aluminate are presented. The first one involves an aluminum containing MOF precursor used as sacrificial template to deposit nickel while the second is based on a one-pot synthesis combined to an EISA method. As shown by a set of complementary techniques, the nickel-aluminate nanospecies formed after calcination are homogeneously distributed within the developed mesoporous alumina matrices whose porous characteristics vary depending on the preparation method. A special attention is paid to electron-microscopy observations using especially STEM imaging with high chemical sensitivity and EDS elemental mapping modes that help visualizing the extremely high nickel dispersion and highlight the strong metal anchoring to the support that persists after reduction. This leads to active nickel nanoparticles particularly stable in the reaction of dry reforming of methane.

Dry reforming of methane to syngas over lanthanum-modified mesoporous nickel aluminate/γ-alumina nanocomposites by one-pot synthesis

2017 ◽  
Vol 42 (16) ◽  
pp. 11333-11345 ◽  
Author(s):  
Li Zhang ◽  
Xueguang Wang ◽  
Chenju Chen ◽  
Xiujing Zou ◽  
Weizhong Ding ◽  
...  
Keyword(s):  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
One Pot ◽  
Nickel Aluminate ◽  
One Pot Synthesis

scholarly journals Investigation of new routes for the preparation of mesoporous calcium oxide supported nickel materials used as catalysts for the methane dry reforming reaction

2020 ◽  
Vol 10 (20) ◽  
pp. 6910-6922
Author(s):  
Ola El Samrout ◽  
Leila Karam ◽  
Karam Jabbour ◽  
Pascale Massiani ◽  
Franck Launay ◽  
...  
Keyword(s):  
Calcium Oxide ◽  
Catalytic Reaction ◽  
Nickel Nanoparticles ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Methane Dry Reforming ◽  
Mesoporous Supports ◽  
Materials Used

Calcium oxide mesoporous supports were successfully synthetized and used to disperse nickel nanoparticles for the dry reforming of methane catalytic reaction.

scholarly journals Factors affecting the long-term stability of mesoporous nickel-based catalysts in combined steam and dry reforming of methane

2016 ◽  
Vol 6 (12) ◽  
pp. 4616-4631 ◽  
Author(s):  
K. Jabbour ◽  
N. El Hassan ◽  
A. Davidson ◽  
S. Casale ◽  
P. Massiani
Keyword(s):  
Dry Reforming ◽  
Coke Deposition ◽  
Dry Reforming Of Methane ◽  
One Pot ◽  
Factors Affecting ◽  
Term Stability ◽  
Long Term Stability ◽  
Highly Efficient ◽  
One Pot Synthesis

Direct “one-pot” synthesis is highly efficient to obtain performing mesoporous Ni–Al2O3catalysts able to resist deactivation by sintering and coke deposition during CH4reforming by CO2and H2O to produce “metgas”.

Highly stable and active Ni-mesoporous alumina catalysts for dry reforming of methane

2012 ◽  
Vol 37 (2) ◽  
pp. 1454-1464 ◽  
Author(s):  
Jarrod Newnham ◽  
Kshudiram Mantri ◽  
Mohamad Hassan Amin ◽  
James Tardio ◽  
Suresh K. Bhargava
Keyword(s):  
Dry Reforming ◽  
Mesoporous Alumina ◽  
Dry Reforming Of Methane ◽  
Alumina Catalysts

scholarly journals Investigation of mesoporous NiAl2O4/MOx (M = La, Ce, Ca, Mg)–γ-Al2O3 nanocomposites for dry reforming of methane

RSC Advances ◽  
2017 ◽  
Vol 7 (53) ◽  
pp. 33143-33154 ◽  
Author(s):  
Li Zhang ◽  
Xueguang Wang ◽  
Chenju Chen ◽  
Xiujing Zou ◽  
Xingfu Shang ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Partial Hydrolysis ◽  
One Pot ◽  
Hydrolysis Method ◽  
Excellent Catalytic Performance

Mesoporous NiAl2O4/MOx (M = La, Ce, Ca, Mg)–γ-Al2O3 composites through a one-pot partial hydrolysis method showed excellent catalytic performance for dry reforming of methane.

scholarly journals Encapsulated Ni@La2O3/SiO2 Catalyst with a One-Pot Method for the Dry Reforming of Methane

Catalysts ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 38 ◽  
Author(s):  
Luhui Wang ◽  
Rong Hu ◽  
Hui Liu ◽  
Qinhong Wei ◽  
Dandan Gong ◽  
...  
Keyword(s):  
Carbon Deposition ◽  
Synthesis Method ◽  
Space Velocity ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Catalyst Characterization ◽  
Porous System ◽  
Ni Nanoparticles ◽  
Solution Combustion ◽  
One Pot

Ni nanoparticles encapsulated within La2O3 porous system (Ni@La2O3), the latter supported on SiO2 (Ni@La2O3)/SiO2), effectively inhibit carbon deposition for the dry reforming of methane. In this study, Ni@La2O3/SiO2 catalyst was prepared using a one-pot colloidal solution combustion method. Catalyst characterization demonstrates that the amorphous La2O3 layer was coated on SiO2, and small Ni nanoparticles were encapsulated within the layer of amorphous La2O3. During 50 h of dry reforming of methane at 700 °C and using a weight hourly space velocity (WHSV) of 120,000 mL gcat−1 h−1, the CH4 conversion obtained was maintained at 80%, which is near the equilibrium value, while that of impregnated Ni–La2O3/SiO2 catalyst decreased from 63% to 49%. The Ni@La2O3/SiO2 catalyst exhibited very good resistance to carbon deposition, and only 1.6 wt% carbon was formed on the Ni@La2O3/SiO2 catalyst after 50 h of reaction, far lower than that of 11.5 wt% deposited on the Ni–La2O3/SiO2 catalyst. This was mainly attributed to the encapsulated Ni nanoparticles in the amorphous La2O3 layer. In addition, after reaction at 700 °C for 80 h with a high WHSV of 600,000 mL gcat−1 h−1, the Ni@La2O3/SiO2 catalyst exhibited high CH4 conversion rate, ca. 10.10 mmol gNi−1 s−1. These findings outline a simple synthesis method to prepare supported encapsulated Ni within a metal oxide porous structure catalyst for the dry reforming of methane reaction.

scholarly journals Highly Active and Carbon-Resistant Nickel Single-Atom Catalysts for Methane Dry Reforming

Catalysts ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 630
Author(s):  
Mohcin Akri ◽  
Achraf El Kasmi ◽  
Catherine Batiot-Dupeyrat ◽  
Botao Qiao
Keyword(s):  
Noble Metals ◽  
Nickel Nanoparticles ◽  
Carbon Deposition ◽  
Clean Energy ◽  
Nickel Catalysts ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Single Atom ◽  
Energy And Environment ◽  
Nanoparticle Catalysts

The conversion of CH4 and CO2 to syngas using low-cost nickel catalysts has attracted considerable interest in the clean energy and environment field. Nickel nanoparticles catalysts suffer from serious deactivation due mainly to carbon deposition. Here, we report a facile synthesis of Ni single-atom and nanoparticle catalysts dispersed on hydroxyapatite (HAP) support using the strong electrostatic adsorption (SEA) method. Ni single-atom catalysts exhibit excellent resistance to carbon deposition and high atom efficiency with the highest reaction rate of 1186.2 and 816.5 mol.gNi−1.h−1 for CO2 and CH4, respectively. Although Ni single-atom catalysts aggregate quickly to large particles, the polyvinylpyrrolidone (PVP)-assisted synthesis exhibited a significant improvement of Ni single-atom stability. Characterizations of spent catalysts revealed that carbon deposition is more favorable over nickel nanoparticles. Interestingly, it was found that, separately, CH4 decomposition on nickel nanoparticle catalysts and subsequent gasification of deposit carbon with CO2 resulted in CO generation, which indicates that carbon is reacting as an intermediate species during reaction. Accordingly, the approach used in this work for the design and control of Ni single-atom and nanoparticles-based catalysts, for dry reforming of methane (DRM), paves the way towards the development of stable noble metals-free catalysts.

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