A5103162418- Zeolite Catalysis and Synthesis
- Mesoporous Materials and Catalysis
- Catalytic Processes in Materials Science
- Chemical Synthesis and Characterization
- Catalysis and Hydrodesulfurization Studies
- Metal-Organic Frameworks: Synthesis and Applications
- Polyoxometalates: Synthesis and Applications
- Catalysis and Oxidation Reactions
- Carbon dioxide utilization in catalysis
- Crystallization and Solubility Studies
- Nanomaterials for catalytic reactions
- Catalysis for Biomass Conversion
- Water Quality Monitoring and Analysis
- Phase Equilibria and Thermodynamics
- CO2 Reduction Techniques and Catalysts
- Covalent Organic Framework Applications
- Chemical Synthesis and Reactions
- Advanced NMR Techniques and Applications
- Catalysts for Methane Reforming
- Asymmetric Hydrogenation and Catalysis
- Aerogels and thermal insulation
- Environmental Impact and Sustainability
- Industrial Gas Emission Control
- Solid-state spectroscopy and crystallography
- Coal Combustion and Slurry Processing
Shanghai Research Institute of Chemical Industry
2006-2024
Sinopec (China)
2009-2024
China National Chemical Corporation (China)
2020-2023
East China University of Science and Technology
2010
Fudan University
2004-2008
Dalian Institute of Chemical Physics
2008
Shanghai Jiao Tong University
2007
Chenming Group (China)
2000
Methanol-to-olefin (MTO) conversion has proven to be one of the most successful non-petrochemical routes for producing light olefins. Silicoaluminophosphate (SAPO) zeolite SAPO-34 is best industrial catalysts MTO conversion, but suffers from rapid deactivation due inherent diffusion bottleneck limited by narrow eight-ring pore openings. To improve performance, considerable synthetic efforts have been devoted decrease crystal size zeolites or introduce secondary larger pores in crystals form...
The silicalite-1 crystal with intracrystal pores in the range of 50–100 nm was synthesized by using nanosized CaCO3 as a hard template. can be trapped into during crystallization process. By means acid dissolution, encapsulated nanoparticles were removed, giving rise to within zeolite crystal. Characterization techniques including XRD, TEM, SEM, and N2 adsorption provided detailed information on this hierarchical pore structure. hydroxyl groups surface are essential taking template effect....
A novel hierarchical SAPO-34 monolith was prepared by the dry gel conversion of amorphous silicoaluminophosphate monolith. The obtained material possesses macropores and mesopores besides micropores. macroporous framework is constructed interconnected spherical aggregates cubic crystals formed close stacking crystals. Catalytic tests show that high catalytic activity compared with conventional microporous for methanol to light olefins (MTO) reaction. better mainly assigned existence porosity.
HZSM-5 zeolite microboxes with a thin intact shell and large hollow core have been synthesized by mild alkaline treatment of ZSM-5 single-crystals Na2CO3 solution. The obtained product was characterized means N2 adsorption, XRD, FT-IR, TEM, temperature-programmed desorption ammonia. morphology architecture the small are exceptionally uniform regular. On other hand, intrinsic crystalline properties in treated well preserved. Furthermore, microbox catalyst exhibits higher activity than parent...
Mesopore-modified ZSM-5 zeolites with hierarchical porous structures (Meso-ZSM-5) have been synthesized by using tetrapropylammonium hydroxide and starch as cotemplates. One- two-dimensional 129Xe NMR spectroscopy has employed to study the porosity under continuous flow of laser-hyperpolarized xenon gas. Besides micropores, mesoporous domains in Meso-ZSM-5 are directly observed variable-temperature experiments. Combining nitrogen adsorption, influence Si/Al ratios on mesopores is also...
Abstract Zeolites, renowned for their abundant crystalline structures and moderate acidities, have garnered significant attention in industrial chemical processes. Among them, the diffusion behaviors of various hydrocarbons within zeolite play a pivotal role due to profound impact on product selectivity separation efficiency. While acid sites are essential determining catalytic performance zeolites, effect intra‐crystalline diffusivities has often been neglected catalyst design. Herein, we...
Abstract SAPO‐34 is an important member in the family of zeolites, which shows excellent catalytic activity MTO reaction, but suffers from diffusion bottleneck. To overcome problem, porogen was added to generate meso/macro pores zeolite. In this work, amphipathic molecules were designed as CSDA synthesize a tri‐level hierarchically porous SAPO‐34, and introduction could promote Si atoms incorporating into AlPO 4 framework, change morphology particles decrease acidity prepared The catalyst...
Zeolite morphology plays a crucial role in affecting catalytic performance, while is persistently challenging to tailor through crystal anisotropic growth. It has been recognized that specific additives can be introduced into the synthesis of zeolites achieve growth, however their and underlying mechanism are not well understood. Herein, effect eight on growth ZSM-5 zeolite unveiled within framework crystallization engineering. Either an inhibition or promotion revealed for each additive...
Abstract The chemical liquid deposition modification can decorate the pore aperture size by external surface deposition, which is a very efficient way to further improve shape‐selective performance of zeolites. Here, SAPO‐34 zeolite was modified with silica and then applied in MTO reaction. It found Brønsted acid SiO 2 ‐modified increased, mainly due transformation from Al‐OH Si‐OH‐Al, promote selectivity light olefins After located on zeolite, reduces apparent diffusion coefficient...
The hydrogen-based industrial systems are key enablers that can help save fossil energy, reduce pollution, and achieve high-quality development goals for the process industry in future.
Abstract Development of a water–gas shift (WGS) catalyst durable in dynamic shutdown/startup operation is essential to enable residential applications H 2 ‐powered fuel‐cell systems but remains conundrum for heterogeneous catalysis. We demonstrate herein that by isomorphic substitution Zr the lattice CeO increase acid density catalyst, complemented dosing small amount O realistic reformate improve oxidizing potential, formation notorious site‐blocking carbonate species on Au can be...
Abstract Introduce meso/macro‐pore to the crystal of SAPO‐34 is an efficient way overcome its inherent diffusion resistance. Porogen, formation hierarchical structure by inhibiting growth crystals, would increase costs and usually not friendly environment. In this work, ingrowth route synthesize developed secondary silica addition via hydrothermal method. Hierarchical porous was synthesized without adding any pore‐generating agent. Secondary put off Si P transferring from mother liquid gel...
Due to the intensive energy consumption and environmental unfriendliness of current industrial anthraquinone process for producing hydrogen peroxide, it is interest develop a clean efficient alternative. Herein, we report that zinc-oxide-supported gold catalyst encapsulated by silica overlayer efficiently catalyzes direct synthesis peroxide from carbon monoxide, oxygen, water. Detailed characterizations demonstrate confinement effect may enhance productivity limiting agglomeration...
Hydrocarbon is a vital kind of chemical compounds to form liquid fuels and polymer monomers. It the backbone national economy closely related people’s lives. processing refers production hydrocarbon with different structures through separation or conversion petroleum resources, such as refined products, which top-down way. processing, including series reactions carbon-carbon bond cleavage, covers major processes refining petrochemicals, main route for products. synthesis uses...
He's representative academic activities are used in this paper to summarize his understanding and contribution green carbon science.First of all, we introduce Mr. analysis on three levels contradictions the process zeolite catalytic cracking.Aiming at key issues these contradictions, he has made new innovation breakthrough science technology cracking.Furthermore, view cycle imbalance caused by utilization fossil resources, He collaborators proposed concept based chemical bonds' evolution.