Specific Localization of Aluminum Sites Favors Ethene-to-Propene Conversion on (Al)MCM-41-Supported Ni(II) Single Sites

ACS Catalysis ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 7476-7485 ◽  
Author(s):  
Ilia B. Moroz ◽  
Alicia Lund ◽  
Monu Kaushik ◽  
Laurent Severy ◽  
David Gajan ◽  
...  
Keyword(s):  
Propene Conversion ◽  
Specific Localization ◽  
Supported Ni ◽  
Mcm 41

Vapor-phase hydrodeoxygenation of guaiacol on Al-MCM-41 supported Ni and Co catalysts

2016 ◽  
Vol 512 ◽  
pp. 93-100 ◽  
Author(s):  
Nga T.T. Tran ◽  
Yoshimitsu Uemura ◽  
Sujan Chowdhury ◽  
Anita Ramli
Keyword(s):  
Vapor Phase ◽  
Co Catalysts ◽  
Supported Ni ◽  
Mcm 41

A Facile Method to Synthesize Ni2P Catalysts and their Catalytic Performances in Hydrotreating Reactions

2019 ◽  
Vol 17 (12) ◽  
Author(s):  
Jianguo Wu ◽  
Shibiao Ren ◽  
Dongdong Hu ◽  
Tao Jiang ◽  
Zhicai Wang ◽  
...  
Keyword(s):  
Mass Spectra ◽  
Atomic Ratio ◽  
Active Species ◽  
Sodium Hypophosphite ◽  
Temperature Reaction ◽  
Nickel Metal ◽  
Atmosphere Temperature ◽  
Supported Ni ◽  
Mcm 41 ◽  
Catalytic Performances

Abstract The bulk and supported Ni2P catalysts (Ni2P/γ-Al2O3 and Ni2P/MCM-41) were facile prepared by using nickel metal as nickel source via thermal treatment of hypophosphite in a separated reactor. The thermal decomposition behaviors of sodium hypophosphite were studied by online mass spectra. The effects of atmosphere, temperature, reaction time, and P/Ni atomic ratio on the as-prepared Ni2P catalysts were investigated. The Ni2P catalysts can also be obtained by using NiCl2 as nickel source but not for NiO. Since the nickel source is nickel metal and Ni2P catalysts were prepared in a separated reactor, the as-prepared Ni2P catalysts from Ni0 can be directly used without further purification, but the as-synthesized Ni2P catalyst from NiCl2 source should be further treated to remove the residues (such as Cl–) before use. As the active species for hydrodenitrogenation (HDN), Ni2P shows much higher activity than Ni0. For hydrodearomatization (HDA), Ni2P/MCM-41 shows much lower activity than Ni/MCM-41 but much better resistance to S-containing compounds in hydrogenation of naphthalene. The mechanism for synthesizing Ni2P catalysts with this facile method is proposed by online mass spectra.

Influence of Templates on the Overgrowth of MCM-41 over HY and the Hydrodesulfurization Performances of the Supported Ni−Mo Catalysts

2009 ◽  
Vol 48 (6) ◽  
pp. 2870-2877 ◽  
Author(s):  
Xiang Li ◽  
Feng Zhou ◽  
Anjie Wang ◽  
Linying Wang ◽  
Yongkang Hu
Keyword(s):  
Supported Ni ◽  
Mcm 41

Mesoporous Al-HMS and Al-MCM-41 supported Ni-Mo sulfide catalysts for HYD and HDS via in situ hydrogen generation through a WGSR

2019 ◽  
Vol 329 ◽  
pp. 156-166 ◽  
Author(s):  
A.V. Vutolkina ◽  
A.P. Glotov ◽  
A.V. Zanina ◽  
D.F. Makhmutov ◽  
A.L. Maximov ◽  
...  
Keyword(s):  
Hydrogen Generation ◽  
Sulfide Catalysts ◽  
Supported Ni ◽  
Mo Sulfide ◽  
Mcm 41

scholarly journals The Role of Active Sites Location in Partial Oxidation of Methane to Syngas for MCM-41 Supported Ni Nanoparticles

Catalysts ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 606 ◽  
Author(s):  
Chuanmin Ding ◽  
Junwen Wang ◽  
Yufeng Li ◽  
Qian Ma ◽  
Lichao Ma ◽  
...  
Keyword(s):  
Partial Oxidation ◽  
Active Sites ◽  
Catalytic Performance ◽  
Partial Oxidation Of Methane ◽  
Pore Channel ◽  
Impregnation Method ◽  
Ni Nanoparticles ◽  
Oxidation Of Methane ◽  
Supported Ni ◽  
Mcm 41

The supporting modes of active metal over mesoporous materials play an important role in catalytic performance. The location of Ni nanoparticles inside or outside the mesoporous channel of MCM-41 has a significant influence on the reactivity in partial oxidation of methane to syngas reaction. The characterization data using different techniques (Transmission Electron Microscope (TEM), X-Ray Diffraction (XRD), N2 adsorption-desorption, H2 Temperature-Programmed Reduction (H2-TPR), and Inductively Coupled Plasma (ICP)) indicated that nickel was located outside the mesoporous channels for the impregnation method (Ni/MCM-41), while nickel was encapsulated within MCM-41 via the one-step hydrothermal crystallization method (Ni-MCM-41). The nickel atoms were mainly dispersed predominantly inside the skeleton of zeolite. When the load amount of Ni increased, both of Ni species inside the skeleton or pore channel of zeolite increased, and the ordered structure of MCM-41 was destroyed gradually. Contributed by the strong interaction with MCM-41, the Ni particles of Ni-MCM-41 were highly dispersed with smaller particle size compared with supported Ni/MCM-41 catalyst. The Ni-MCM-41 displayed higher catalytic performance than Ni/MCM-41, especially 10% Ni-MCM-41 due to high dispersity of Ni. The confinement effect of MCM-41 zeolite also afforded high resistance of sintering and coking for 10% Ni-MCM-41 catalyst. Especially, 10% Ni-MCM-41 catalyst showed outstanding catalytic stability.

Supported Ni–Al–VPO/MCM-41 As Efficient and Stable Catalysts for Highly Selective Preparation of Adipic Acid from Cyclohexane with NO2

2016 ◽  
Vol 55 (13) ◽  
pp. 3729-3735 ◽  
Author(s):  
Jian Jian ◽  
Kuiyi You ◽  
Qing Luo ◽  
Hongxu Gao ◽  
Fangfang Zhao ◽  
...  
Keyword(s):  
Adipic Acid ◽  
Supported Ni ◽  
Mcm 41

Effect of surface Na+ or K+ ion exchange on hydrodesulfurization performance of MCM-41-supported Ni–W catalysts

2007 ◽  
Vol 316 (2) ◽  
pp. 134-141 ◽  
Author(s):  
Xiang Li ◽  
Anjie Wang ◽  
Sheng Zhang ◽  
Yongying Chen ◽  
Yongkang Hu
Keyword(s):  
Ion Exchange ◽  
Supported Ni ◽  
Mcm 41 ◽  
Effect Of Surface

Preparation of highly active MCM-41 supported Ni 2 P catalysts and its dibenzothiophene HDS performance

2018 ◽  
Vol 26 (3) ◽  
pp. 540-544 ◽  
Author(s):  
Hua Song ◽  
Qi Yu ◽  
Yanguang Chen ◽  
Yuanyuan Wang ◽  
Ruixia Niu
Keyword(s):  
Highly Active ◽  
Supported Ni ◽  
Mcm 41

The design and catalytic performance of molybdenum active sites on an MCM-41 framework for the aerobic oxidation of 5-hydroxymethylfurfural to 2,5-diformylfuran

2019 ◽  
Vol 9 (3) ◽  
pp. 811-821 ◽  
Author(s):  
Zhao-Meng Wang ◽  
Li-Juan Liu ◽  
Bo Xiang ◽  
Yue Wang ◽  
Ya-Jing Lyu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Active Sites ◽  
Aerobic Oxidation ◽  
Catalytic Performance ◽  
Mcm 41

The catalytic activity decreases as –(SiO)3Mo(OH)(O) > –(SiO)2Mo(O)2 > –(O)4–MoO.

Benzene confined in MCM-41 below its melting point : A proton NMR study

2000 ◽  
Vol 10 (PR7) ◽  
pp. Pr7-99-Pr7-102 ◽  
Author(s):  
G. Dosseh ◽  
D. Morineau ◽  
C. Alba-Simionesco
Keyword(s):  
Melting Point ◽  
Proton Nmr ◽  
Nmr Study ◽  
Mcm 41
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