Titanium silicalite-1 zeolite encapsulating Au particles as a catalyst for vapor phase propylene epoxidation with H2/O2: a matter of Au–Ti synergic interaction

2020 ◽  
Vol 8 (8) ◽  
pp. 4428-4436 ◽  
Author(s):  
Lu Wang ◽  
Jiajun Dai ◽  
Yan Xu ◽  
Yingling Hong ◽  
Jiale Huang ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Solvent Free ◽  
Titanium Silicalite ◽  
Propylene Epoxidation

Seed-directed solvent-free crystallization combined with bio-extract integration is used to encapsulate Au into TS-1, enhancing Au–Ti synergic interaction. The resulted Au–Ti@MFI exhibits excellent performances for vapor phase propylene epoxidation.

scholarly journals Vapor‐Phase Linker Exchange of the Metal–Organic Framework ZIF‐8: A Solvent‐Free Approach to Post‐synthetic Modification

2019 ◽  
Vol 58 (51) ◽  
pp. 18471-18475
Author(s):  
João Marreiros ◽  
Lenz Van Dommelen ◽  
Guillaume Fleury ◽  
Rodrigo Oliveira‐Silva ◽  
Timothée Stassin ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Metal Organic Framework ◽  
Solvent Free ◽  
Metal Organic ◽  
Linker Exchange ◽  
Organic Framework

Kinetics of propylene epoxidation with hydrogen peroxide catalyzed by extruded titanium silicalite in methanol

2016 ◽  
Vol 57 (4) ◽  
pp. 466-473 ◽  
Author(s):  
A. V. Sulimov ◽  
S. M. Danov ◽  
A. V. Ovcharova ◽  
A. A. Ovcharov ◽  
V. R. Flid
Keyword(s):  
Hydrogen Peroxide ◽  
Titanium Silicalite ◽  
Propylene Epoxidation ◽  
Kinetics Of

Vapor phase propylene epoxidation over Au/Ti-MCM-41 catalysts prepared by different Ti incorporation modes

2003 ◽  
Vol 240 (1-2) ◽  
pp. 243-252 ◽  
Author(s):  
A.K Sinha ◽  
S Seelan ◽  
T Akita ◽  
S Tsubota ◽  
M Haruta
Keyword(s):  
Vapor Phase ◽  
Propylene Epoxidation ◽  
Mcm 41

scholarly journals Vapor-Phase Linker Exchange of the Metal-Organic Framework ZIF-8: A Solvent-Free Approach to Post-Synthetic Modification

2019 ◽  
Author(s):  
Joao Marreiros ◽  
Lenz Van Dommelen ◽  
Guillaume Fleury ◽  
Rodrigo de Oliveira-Silva ◽  
Timothée Stassin ◽  
...  
Keyword(s):  
Single Crystal ◽  
Vapor Phase ◽  
Metal Organic Framework ◽  
Solvent Free ◽  
Metal Organic ◽  
Crystal Core ◽  
Linker Exchange ◽  
Selection Of ◽  
Organic Framework

Here we present a novel, solvent-free approach to post-synthetic linker exchange in ZIF-8 through exposure to linker vapor. As in the solvent-based approach, this vapor-phase linker exchange (VPLE) method retains the parent SOD topology and proceeds in a single-crystal to single-crystal manner. The scope of linkers that can be incorporated through VPLE was studied and criteria for the selection of further candidates were formulated. In large crystals, the incoming linker was found to form domains instead of distributing homogeneously, similar as for solution-based linker exchange. In contrast to the latter approach, VPLE yields a higher concentration of the incoming linker in the crystal core instead of the shell.

scholarly journals Synthesis of Low Cost Titanium Silicalite-1 Zeolite for Highly Efficient Propylene Epoxidation

2021 ◽  
Vol 9 ◽  
Author(s):  
Meng Liu ◽  
Zihan Huang ◽  
Wei Wei ◽  
Xiangyu Wang ◽  
Yiqiang Wen
Keyword(s):  
Catalytic Activity ◽  
Hydrothermal Reaction ◽  
Low Cost ◽  
Synthesis Method ◽  
Industrial Applications ◽  
Synthesis Process ◽  
Titanium Silicalite ◽  
High Turnover ◽  
Propylene Epoxidation ◽  
Widespread Application

Developing an effective and low-cost system to synthesize titanium silicalite-1 (TS-1) zeolite is desirable for a range of industrial applications. To date, the poor catalytic activity of the synthesized zeolite due to the low amount of framework titanium and large crystal size is the main obstacle limiting the widespread application of this material. Moreover, a large amount of wastewater is often produced by the existing synthesis process. Herein, a green and sustainable route for synthesizing small-crystal TS-1 with a high fraction of framework Ti was demonstrated via a seed-assisted method using a tetrapropylammonium bromide (TPABr)-ethanolamine hydrothermal system. The influence of the synthesis conditions on the physicochemical properties and catalytic activities of TS-1 was investigated. With the assistance of nanosized S-1 seeds, the incorporation of Ti into the framework of TS-1 was promoted, and the crystallization rate was effectively accelerated. After alkaline etching, the obtained hierarchical TS-1 had higher catalytic activity towards propylene epoxidation with an extremely high turnover frequency of 1,650 h−1. Furthermore, the mother liquid during the hydrothermal reaction could be reused for the next synthesis procedure. Consequently, utilization ratios of both ethanolamine and TPABr exceeding 95% were achieved by recycling the mother liquid. This low-cost approach for reducing wastewater could be easily scaled up to provide a promising synthesis method for the industrial production of TS-1 and other topological zeolites.

scholarly journals Vapor‐Phase Linker Exchange of the Metal–Organic Framework ZIF‐8: A Solvent‐Free Approach to Post‐synthetic Modification

2019 ◽  
Vol 131 (51) ◽  
pp. 18642-18646
Author(s):  
João Marreiros ◽  
Lenz Van Dommelen ◽  
Guillaume Fleury ◽  
Rodrigo Oliveira‐Silva ◽  
Timothée Stassin ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Metal Organic Framework ◽  
Solvent Free ◽  
Metal Organic ◽  
Linker Exchange ◽  
Organic Framework
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