A5100703168- Zeolite Catalysis and Synthesis
- Catalytic Processes in Materials Science
- Mesoporous Materials and Catalysis
- Metal-Organic Frameworks: Synthesis and Applications
- Catalysis and Hydrodesulfurization Studies
- Catalysis and Oxidation Reactions
- Catalysts for Methane Reforming
- Catalysis for Biomass Conversion
- Nanomaterials for catalytic reactions
- Advanced NMR Techniques and Applications
- Nanocluster Synthesis and Applications
- Radical Photochemical Reactions
- Advanced Photocatalysis Techniques
- Boron and Carbon Nanomaterials Research
- Field-Flow Fractionation Techniques
- Carbon dioxide utilization in catalysis
- Asymmetric Hydrogenation and Catalysis
- Chemical Reaction Mechanisms
- Fire dynamics and safety research
- Catalytic C–H Functionalization Methods
- Spectroscopy and Quantum Chemical Studies
- Surface Chemistry and Catalysis
- Covalent Organic Framework Applications
- Advanced Chemical Physics Studies
- Graphene research and applications
Shanghai Research Institute of Chemical Industry
2019-2024
Sinopec (China)
2013-2023
Fudan University
2013-2014
Chinese Academy of Sciences
2004-2012
Shanghai Institute of Ceramics
2010-2012
Institute of Chemistry
2004
Employing conventional block copolymers as scaffold, a direct synthetic route of mesoporous zeolites has been developed with the assistance post-steaming treatment. Such hierarchical micro/mesostructure demonstrated greatly enhanced catalytic activity for probe reactions, such cracking triisopropylbenzene and esterification reactions involving bulky molecules, because increased external surface, diminished coke formation by shortened diffusion length in microporous networks.
Hierarchically structured zeolites (HSZs) have attracted increasing attention in the last few years, thanks to their unique hierarchical porous structures combining micro- and mesoporosity superior material performances, especially bulky molecules-involved catalysis adsorption applications. In this Feature Article, recent advances HSZs synthetic methodologies performances are overviewed. Further, some perspectives for future development of discussed.
Zeolite morphology is crucial in determining their catalytic activity, selectivity and stability, but quantitative descriptors of such a effect are challenging to define. Here we introduce descriptor that accounts for the performances H-ZSM-5 zeolite C4 olefin cracking. A series zeolites with similar sheet-like different c-axis lengths were synthesized. We found activity stability improved samples longer c-axis. Combining time-resolved in-situ FT-IR spectroscopy molecular dynamics...
We report the synthesis of a new hierarchical mesoporous TS-1 type zeolite by simple steam-assisted crystallization method. This novel product exhibits high catalytic activity and strongly prolonged lifetime in selective oxidation 2,3,6-trimethylphenol to trimethyl-p-benzoquinone.
The new hierarchy: c-TUD-1, a aluminosilicate with hierarchical micro/mesoporous structure, has been successfully synthesized by steam-assisted post-crystallization process. c-TUD-1 large pore size and volume, high surface area, acid concentration/strength, hydrothermal stability, demonstrates significantly higher activity than either amorphous or bulky ZSM-5 in catalytic reactions involving molecules. Detailed facts of importance to specialist readers are published as "Supporting...
Mesoporous TS-1 zeolites (MTS-1) were prepared through direct hydrothermal treatment by using CTAB as the mesoporogen under assistance of ethanol, and they demonstrated much higher catalytic activity better recyclability in thiophene oxidation, due to decreased hydrophobicity mesoporous structure.
Controlling the formation, diffusion, and conversion of bridging intermediate is important for improving performance a tandem reaction over multi-component catalyst. However, it remains highly challenging because random distribution catalytic components via conventional mechanical combination usually endows nondirectional resulting in an obvious decrease performance. Here, we report recrystallization methodology dealing with extruded Cr2O3/ZSM-5 bifunctional catalyst to distribute oxide on...
Significance Diffusion is the primary process in practical multidisciplinary areas such as separation and catalysis. Transportation usually positively correlated with temperature due to thermal motion. We show here an anomalous phenomenon wherein a higher effectively slows diffusion for linear-chain hydrocarbon molecules under confinement. Such obstruction results from novel mechanism of “thermal resistance effect,” which configuration guest molecule significantly deformed effect then...
In the absence of additional mesoporous template, hierarchically structured zeolites (HSZs) with variable Si/Al ratios (30–150) have been successfully synthesized via a newly developed steam-assisted crystallization process. The materials were characterized powder X-ray diffraction, nitrogen sorption measurement, scanning electron microscopy, transmission inductively coupled plasma optical emission spectrometry, solid-state nuclear magnetic resonance, and ammonia temperature-programmed...
Stabilities and dehydrogenation activities of butane cyclohexane on four different Zn sites in ZSM-5 zeolite were theoretically revealed. ZnOH<sup>+</sup> was identified as the most active site at low temperature activity increases with sequence dehydrogenation.
Synergetic enhancement between sorption and diffusion has been found in zeolites with continuum intersecting channels.
A hierarchical micro/mesoporous aluminosilicate has been synthesized using an optimized steam-assisted crystallization method, by which the material shows perfect of zeolite frameworks and relatively high surface area meso/micropore volumes. Key factors for mesoporous in process, especially gel drying temperature, role triethanolamine as mesopore template, have not addressed before, were identified successful synthesis structure detail. An energy level schematic was proposed to illustrate...
Investigating the mass transfer of toluene methylation with methanol will contribute to converting more feedstock into para-methyl group. The reaction system was considered as three competing reactions: and isomerization para-xylene light hydrocarbons. When thiele modulus analysis method employed, degree utilization each calculated over varied ZSM-5 zeolite catalysts. It found that improvement leads a significant increase in reaction. And further reduce isomerization, modification micropore...