One-pot synthesis of highly sintering- and coking-resistant Ni nanoparticles encapsulated in dendritic mesoporous SiO2 for methane dry reforming

2018 ◽  
Vol 54 (99) ◽  
pp. 13993-13996 ◽  
Author(s):  
Jingqing Tian ◽  
Bing Ma ◽  
Saiyu Bu ◽  
Qinghong Yuan ◽  
Chen Zhao
Keyword(s):  
Dry Reforming ◽  
Ni Nanoparticles ◽  
One Pot ◽  
Methane Dry Reforming ◽  
One Pot Synthesis ◽  
Mesoporous Sio2

We present a one-pot method for the encapsulation of small Ni particles into a dendritic SiO2 skeleton.

Facile one-pot synthesis of highly dispersed Ni nanoparticles embedded in HMS for dry reforming of methane

2017 ◽  
Vol 313 ◽  
pp. 1370-1381 ◽  
Author(s):  
Mingzhi Wang ◽  
Qiulin Zhang ◽  
Tengfei Zhang ◽  
Yiru Wang ◽  
Jing Wang ◽  
...  
Keyword(s):  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Ni Nanoparticles ◽  
One Pot ◽  
One Pot Synthesis ◽  
Highly Dispersed

One-pot Synthesis of Ordered Mesoporous NiCeAl Oxide Catalysts and a Study of Their Performance in Methane Dry Reforming

ChemCatChem ◽  
2014 ◽  
pp. n/a-n/a ◽  
Author(s):  
Ning Wang ◽  
Zhenxin Xu ◽  
Jie Deng ◽  
Kui Shen ◽  
Xiaopeng Yu ◽  
...  
Keyword(s):  
Dry Reforming ◽  
Oxide Catalysts ◽  
One Pot ◽  
Methane Dry Reforming ◽  
One Pot Synthesis ◽  
Ordered Mesoporous

scholarly journals Elucidation of the higher coking resistance of small versus large nickel nanoparticles in methane dry reforming via computational modeling

2017 ◽  
Vol 7 (15) ◽  
pp. 3339-3347 ◽  
Author(s):  
Hristiyan A. Aleksandrov ◽  
Nikolaos Pegios ◽  
Regina Palkovits ◽  
Kalin Simeonov ◽  
Georgi N. Vayssilov
Keyword(s):  
Computational Modeling ◽  
Nickel Nanoparticles ◽  
Dry Reforming ◽  
Ni Nanoparticles ◽  
Methane Dry Reforming ◽  
Carbon Chains

Monoatomic C species remain separated in the subsurface regions of small Ni nanoparticles, while in larger particles, carbon chains are formed, which can be considered as precursors for coke or graphene formation.

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”.

scholarly journals Facile immobilization of Ni nanoparticles into mesoporous MCM-41 channels for efficient methane dry reforming

2019 ◽  
Vol 40 (9) ◽  
pp. 1395-1404 ◽  
Author(s):  
Jingqing Tian ◽  
Haocheng Li ◽  
Xin Zeng ◽  
Zichun Wang ◽  
Jun Huang ◽  
...  
Keyword(s):  
Dry Reforming ◽  
Ni Nanoparticles ◽  
Methane Dry Reforming ◽  
Mcm 41

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 Ni-containing catalysts based on ordered mesoporous MgO–Al2O3for methane dry reforming

2018 ◽  
Vol 5 (1) ◽  
pp. 59-66 ◽  
Author(s):  
Svetlana Pavlova ◽  
Yuliya Fedorova ◽  
Arkadii Ishchenko ◽  
Maxim Melgunov ◽  
Elena Melgunova ◽  
...  
Keyword(s):  
Self Assembly ◽  
Mesoporous Structure ◽  
Dry Reforming ◽  
One Pot ◽  
Methane Dry Reforming ◽  
Pluronic P123 ◽  
Ordered Mesoporous ◽  
Evaporation Induced Self Assembly ◽  
The One ◽  
Adsorption Desorption

Abstract The ordered mesoporous Mg- and Ni-Mg-alumina samples of general formula xwt%Mg-Al2O3 and ywt%Nixwt% Mg-Al2O3(x, y = 5, 10 % wt) have been prepared by the one-pot evaporation induced self-assembly (EISA) method using Pluronic P123 as a template. The textural and structural properties of the prepared samples have been characterized by N2adsorption-desorption analysis, BET, XRD, TEM with EDX, HAADF-STEM, and H2-TPR. The samples calcined at 700°C had an ordered mesoporous structure with a SSA of 170-250 m2/g, a pore volume of 0.5-0.64 cm3/g and a narrow distribution of the pore size (mean 12-16 nm). For the catalysts prepared by the one-pot EISA method, the size of the metal Ni particles was in the range of 3-12 nm and was conditioned by their confinement in the mesopores and the interaction with MgO and Al2O3. Testing in methane dry reforming in the 15v.% CH4+ 15v.%CO2feed, with He balance, at 650-750°C and the contact time of 0.015 s has shown the higher activity and stability of the ordered mesoporous 10w%Ni- 10w%Mg-Al2O3catalysts prepared by the one-pot method as compared with the catalyst of the same composition obtained by impregnation.

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