A non-chemically selective top-down approach towards the preparation of hierarchical TS-1 zeolites with improved oxidative desulfurization catalytic performance

2016 ◽  
Vol 52 (17) ◽  
pp. 3580-3583 ◽  
Author(s):  
Shuting Du ◽  
Xiaoxin Chen ◽  
Qiming Sun ◽  
Ning Wang ◽  
Mingjun Jia ◽  
...  
Keyword(s):  
Oxidative Desulfurization ◽  
Catalytic Performance ◽  
Top Down ◽  
Chemically Selective ◽  
Fluoride Medium

Hierarchical TS-1 zeolites with enhanced performance in oxidative desulfurization of bulky molecules are prepared by treatment in fluoride medium.

Effect of Preparation Methods of HPW/SiO2 Mesoporous Composites on its Catalytic Performance in Fuel Oils Desulfurization

2010 ◽  
Vol 148-149 ◽  
pp. 924-928
Author(s):  
Xue Min Yan ◽  
Yuan Zhu Mi
Keyword(s):  
Catalytic Activity ◽  
Self Assembly ◽  
Electrostatic Force ◽  
Oxidative Desulfurization ◽  
Strong Acid ◽  
Catalytic Performance ◽  
Synthesis Mechanism ◽  
Base Interaction ◽  
Preparation Methods ◽  
Oh Groups

Two kinds of mesoporous HPW/SiO2 composites, which have been synthesized respectively by the amino-functionalized (AF) method and evaporation-induced self-assembly (EISA) method, have been used as catalysts in the oxidative desulfurization process of dibenzothiophene(DBT). The catalytic performance results show that the catalyst synthesized by EISA method holds higher catalytic activity than that synthesized by the AF method. The difference of catalytic activity can be attributed to the different synthesis mechanism of two kinds of composites. In the AF method, the bonding force between HPW and SiO2 is strong acid-base interaction, which damages the Keggin structure. Whereas in the EISA process, electrostatic force and hydrogen bonds between W=O groups and Si-OH groups are main bonding forces. The hydrogen bond holds the electron-withdrawing effect, which increases the activity of nonbonding W=O groups in HPW and then results in the enhancement of the catalytic activity.

scholarly journals Enhanced Electrocatalytic Activity and Stability toward the Oxygen Reduction Reaction with Unprotected Pt Nanoclusters

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 955 ◽  
Author(s):  
Jing Liu ◽  
Jiao Yin ◽  
Bo Feng ◽  
Tao Xu ◽  
Fu Wang
Keyword(s):  
Carbon Nanotubes ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Specific Activity ◽  
Catalytic Performance ◽  
Reduction Reaction ◽  
Top Down ◽  
Methanol Tolerance ◽  
Pt Nanoclusters ◽  
Mass Activity

The Pt particles within diameters of 1–3 nm known as Pt nanoclusters (NCs) are widely considered to be satisfactory oxygen reduction reaction (ORR) catalysts due to higher electrocatalytic performance and cost effectiveness. However, the utilization of such smaller Pt NCs is always limited by the synthesis strategies, stability and methanol tolerance of Pt. Herein, unprotected Pt NCs (~2.2 nm) dispersed on carbon nanotubes (CNTs) were prepared via a modified top-down approach using liquid Li as a solvent to break down the bulk Pt. Compared with the commercial Pt/C, the resultant Pt NCs/CNTs catalyst (Pt loading: 10 wt.%) exhibited more desirable ORR catalytic performance in 0.1 M HClO4. The specific activity (SA) and mass activity (MA) at 0.9 V for ORR over Pt NCs/CNTs were 2.5 and 3.2 times higher than those over the commercial Pt/C (Pt loading: 20 wt.%). Meanwhile, the Pt NCs/CNTs catalyst demonstrated more satisfactory stability and methanol tolerance. Compared with the obvious loss (~69%) of commercial Pt/C, only a slight current decrease (~10%) was observed for Pt NCs/CNTs after the chronoamperometric measurement for 2 × 104 s. Hence, the as-prepared Pt NCs/CNTs material displays great potential as a practical ORR catalyst.

Direct synthesis of mesoporous TiO2 and its catalytic performance in DBT oxidative desulfurization

2008 ◽  
Vol 116 (1-3) ◽  
pp. 378-385 ◽  
Author(s):  
D. Huang ◽  
Y.J. Wang ◽  
Y.C. Cui ◽  
G.S. Luo
Keyword(s):  
Direct Synthesis ◽  
Oxidative Desulfurization ◽  
Catalytic Performance ◽  
Mesoporous Tio2

scholarly journals Efficient catalytic performance of tetra-alkyl orthotitanates for the oxidative desulfurization of dibenzothiophene at room temperature

2019 ◽  
Vol 22 (4) ◽  
pp. 321-326 ◽  
Author(s):  
Xiaolin Li ◽  
Hui Qi ◽  
Wei Zhou ◽  
Wei Xu ◽  
Yinyong Sun
Keyword(s):  
Room Temperature ◽  
Oxidative Desulfurization ◽  
Catalytic Performance

Deep Oxidative Desulfurization of Dibenzothiophene by Functional Tungsten-Containing Mesoporoussilica from Polyoxometalate-Based Salts

2014 ◽  
Vol 636 ◽  
pp. 93-96
Author(s):  
Ming Zhang ◽  
Wen Shuai Zhu ◽  
Meng Li ◽  
Yan An Li ◽  
Suhang Xun ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Organic Solvents ◽  
Room Temperature ◽  
Oxidative Desulfurization ◽  
Catalytic Performance ◽  
Sulfur Compounds ◽  
High Dispersion ◽  
One Pot ◽  
Tungsten Species

Tungsten-containing functional mesoporousW-SiO2 have been successfully synthesized by an one-pot and facile room-temperature procedure. These materials presented a high dispersion of tungsten species and excellent catalytic activity on the removal of sulfur compounds without any organic solvents as extractants. The catalytic performance on sulfur compounds was investigated in detail. After recycling for 8 times, the removal of the oxidation desulfurization system could still reach 92.0%.

Preparation of Titanium-containing Hierarchical Zeolite Y and Its Catalytic Performance in Oxidative Desulfurization of Dibenzothiophene

2018 ◽  
Vol 7 (2) ◽  
pp. 122-128
Author(s):  
Xing Zhang ◽  
Kunyue Leng ◽  
Changmin Hou ◽  
Yinyong Sun
Keyword(s):  
Zeolite Y ◽  
Oxidative Desulfurization ◽  
Catalytic Performance ◽  
Hierarchical Zeolite

Direct synthesis of mesoporous H 3 PMo 12 O 40 /SiO 2 and its catalytic performance in oxidative desulfurization of fuel oil

Fuel ◽  
2015 ◽  
Vol 147 ◽  
pp. 195-202 ◽  
Author(s):  
Jianghua Qiu ◽  
Guanghui Wang ◽  
Yuqin Zhang ◽  
Danlin Zeng ◽  
Yang Chen
Keyword(s):  
Direct Synthesis ◽  
Oxidative Desulfurization ◽  
Catalytic Performance ◽  
Fuel Oil

scholarly journals Phosphomolybdic acid immobilized on ionic liquid-modified hexagonal boron nitride for oxidative desulfurization of fuel

RSC Advances ◽  
2017 ◽  
Vol 7 (85) ◽  
pp. 54266-54276 ◽  
Author(s):  
Haiyan Ji ◽  
Haitao Ju ◽  
Rong Lan ◽  
Peiwen Wu ◽  
Jia Sun ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Boron Nitride ◽  
Hexagonal Boron Nitride ◽  
Oxidative Desulfurization ◽  
Supported Catalyst ◽  
Phosphomolybdic Acid ◽  
Catalytic Performance ◽  
Catalytic Oxidative Desulfurization ◽  
Enhanced Stability ◽  
Excellent Catalytic Performance

An ionic liquid modified hexagonal boron nitride was developed for preparation of a supported catalyst with enhanced stability and excellent catalytic performance in catalytic oxidative desulfurization.

Oxidative desulfurization of diesel fuel by mesoporous phosphotungstic acid/SiO2: the effect of preparation methods on catalytic performance

2013 ◽  
Vol 20 (5) ◽  
pp. 1379-1385 ◽  
Author(s):  
Jiaheng Lei ◽  
Lina Chen ◽  
Peng Yang ◽  
Xiaodi Du ◽  
Xuemin Yan
Keyword(s):  
Diesel Fuel ◽  
Phosphotungstic Acid ◽  
Oxidative Desulfurization ◽  
Catalytic Performance ◽  
Preparation Methods

Synthesis of hierarchical TS-1 zeolite via a novel three-step crystallization method and its excellent catalytic performance in oxidative desulfurization

Fuel ◽  
2017 ◽  
Vol 188 ◽  
pp. 232-238 ◽  
Author(s):  
Qi Du ◽  
Yiping Guo ◽  
Huanan Duan ◽  
Hua Li ◽  
Yujie Chen ◽  
...  
Keyword(s):  
Oxidative Desulfurization ◽  
Catalytic Performance ◽  
Crystallization Method ◽  
Excellent Catalytic Performance ◽  
Step Crystallization
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