Synthesis of nanocrystalline zeolite beta in supercritical fluids, characterization and catalytic activity

2006 ◽  
Vol 252 (1-2) ◽  
pp. 76-84 ◽  
Author(s):  
M. Lakshmi Kantam ◽  
Bhavnari P.C. Rao ◽  
B.M. Choudary ◽  
K. Koteswara Rao ◽  
Bojja Sreedhar ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Supercritical Fluids ◽  
Zeolite Beta

Origin of the optimum in catalytic activity of zeolite beta

1998 ◽  
Vol 94 (4) ◽  
pp. 617-621 ◽  
Author(s):  
Fre´de´ric Vaudry ◽  
Francesco Di Renzo ◽  
Francois Fajula ◽  
Philippe Schulz
Keyword(s):  
Catalytic Activity ◽  
Zeolite Beta

Characterization and catalytic activity of titanium containing SSZ-33 and aluminum-free zeolite beta

1996 ◽  
Vol 143 (1) ◽  
pp. 53-73 ◽  
Author(s):  
Christopher B. Dartt ◽  
Mark E. Davis
Keyword(s):  
Catalytic Activity ◽  
Zeolite Beta

Cu/Mn co-loaded hierarchically porous zeolite beta: a highly efficient synergetic catalyst for soot oxidation

2015 ◽  
Vol 3 (18) ◽  
pp. 9745-9753 ◽  
Author(s):  
Xiaoxia Zhou ◽  
Hangrong Chen ◽  
Guobin Zhang ◽  
Jin Wang ◽  
Zhiguo Xie ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Oxidation ◽  
Hydrothermal Treatment ◽  
Water Resistance ◽  
Soot Oxidation ◽  
Zeolite Beta ◽  
Hierarchically Porous ◽  
Highly Efficient ◽  
Mn Species ◽  
Surfactant Assisted

A hierarchically porous zeolite beta as a carrier was made by surfactant-assisted hydrothermal treatment and subsequent alkali etching, and the Cu/Mn species were co-loaded into the carrier. The obtained catalyst exhibits excellent catalytic activity and water-resistance for soot catalytic oxidation.

Tuning supported Ni catalysts by varying zeolite Beta heteroatom composition: effects on ethylene adsorption and dimerization catalysis

2021 ◽  
Author(s):  
Michael Meloni ◽  
Ron Runnebaum
Keyword(s):  
Catalytic Activity ◽  
Electron Density ◽  
Zeolite Beta ◽  
Ni Catalysts ◽  
Composition Effects ◽  
Ethylene Adsorption ◽  
Supported Ni Catalysts ◽  
Supported Ni

The influence of zeolite heteroatom composition on the electron density and catalytic activity of a supported Ni cation is examined. Ni-[X]-Beta catalysts, where X = Al, Ga, Fe, or dealuminated,...

scholarly journals Effect of the impregnation order on the nature of metal particles of bi-functional Pt/Pd-supported zeolite Beta materials and on their catalytic activity for the hydroisomerization of alkanes

2008 ◽  
Vol 254 (1) ◽  
pp. 12-26 ◽  
Author(s):  
R ROLDAN ◽  
A BEALE ◽  
M SANCHEZSANCHEZ ◽  
F ROMEROSALGUERO ◽  
C JIMENEZSANCHIDRIAN ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Zeolite Beta ◽  
Metal Particles

scholarly journals Pt/Fe co-loaded mesoporous zeolite beta for CO oxidation with high catalytic activity and water resistance

RSC Advances ◽  
2019 ◽  
Vol 9 (48) ◽  
pp. 28089-28094 ◽  
Author(s):  
Qinru Li ◽  
Xiaoxia Zhou ◽  
Wanpeng Zhao ◽  
Chunlei Peng ◽  
Huixia Wu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ion Exchange ◽  
Ethylene Glycol ◽  
Co Oxidation ◽  
Water Resistance ◽  
Reduction Method ◽  
Zeolite Beta ◽  
High Catalytic Activity ◽  
Mesoporous Zeolite ◽  
Highly Dispersed

A series of Pt/Fe co-loaded mBeta catalysts with highly dispersed Pt species have been successfully prepared by an ion exchange and subsequent ethylene glycol reduction method, and show excellent catalytic activity and durability in CO oxidation.

Cubic and Hexagonal Mesoporous Aluminosilicates Assembled from Secondary Building Units Characteristic of Zeolite Beta

2013 ◽  
Vol 781-784 ◽  
pp. 194-197 ◽  
Author(s):  
Wan Ping Guo ◽  
Juan Liu ◽  
Zhen Zhang ◽  
Lin Yu
Keyword(s):  
Catalytic Activity ◽  
Mesoporous Materials ◽  
Catalytic Cracking ◽  
Zeolite Beta ◽  
Mesoporous Aluminosilicates ◽  
Cumene Cracking ◽  
Secondary Building Units ◽  
Cracking Reaction ◽  
Catalytic Cracking Reaction ◽  
Mcm 41

To improve the structure order and catalytic activity of mesoporous materials, cubic (SBU-MCM-48) and hexagonal (SBU-MCM-41) mesoporous aluminosilicates containing secondary building units characteristic of zeolite Beta have been prepared, and characterized by means of XRD, N2 adsorption, IR spectroscopy, catalytic cracking reaction compared with the corresponding MCM-41. We found that the introduction of secondary building units characteristic of zeolite Beta into the mesopore wall could be an effective route to improve the acidity of mesoporous materials. Moreover, cubic SBU-MCM-48 has been more active than hexagonal SBU-MCM-41 for cumene cracking reaction.

High resolution electron microscopy of lanthanum phosphate crystals

1978 ◽  
Vol 36 (1) ◽  
pp. 274-275
Author(s):  
J. C. Wheatley ◽  
J. M. Cowley
Keyword(s):  
Electron Microscopy ◽  
Catalytic Activity ◽  
High Resolution ◽  
Petroleum Industry ◽  
High Resolution Electron Microscopy ◽  
Lanthanum Phosphate ◽  
Good Catalyst ◽  
Resolution Electron ◽  
Good Catalytic Activity ◽  
Physical And Chemical

Rare-earth phosphates are of particular interest because of their catalytic properties associated with the hydrolysis of many aromatic chlorides in the petroleum industry. Lanthanum phosphates (LaPO4) which have been doped with small amounts of copper have shown increased catalytic activity (1). However the physical and chemical characteristics of the samples leading to good catalytic activity are not known.Many catalysts are amorphous and thus do not easily lend themselves to methods of investigation which would include electron microscopy. However, the LaPO4, crystals are quite suitable samples for high resolution techniques.The samples used were obtained from William L. Kehl of Gulf Research and Development Company. The electron microscopy was carried out on a JEOL JEM-100B which had been modified for high resolution microscopy (2). Standard high resolution techniques were employed. Three different sample types were observed: 669A-1-5-7 (poor catalyst), H-L-2 (good catalyst) and 27-011 (good catalyst).

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.

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