A5101667193- Zeolite Catalysis and Synthesis
- Catalysis and Oxidation Reactions
- Metal-Organic Frameworks: Synthesis and Applications
- Catalytic Processes in Materials Science
- Mesoporous Materials and Catalysis
- Extraction and Separation Processes
- Catalysis and Hydrodesulfurization Studies
- Chemical Synthesis and Characterization
- Recycling and Waste Management Techniques
- Advanced Measurement and Metrology Techniques
- Fiber-reinforced polymer composites
- Advancements in Battery Materials
- Advanced Battery Technologies Research
- Advanced machining processes and optimization
- Advanced Sensor and Energy Harvesting Materials
- Water-Energy-Food Nexus Studies
- Graphite, nuclear technology, radiation studies
- Cyclopropane Reaction Mechanisms
- Surface Modification and Superhydrophobicity
- Hydrology and Watershed Management Studies
- Optical measurement and interference techniques
- Water resources management and optimization
- Asymmetric Synthesis and Catalysis
- Coordination Chemistry and Organometallics
- Textile materials and evaluations
Research Center for Eco-Environmental Sciences
2023
Chinese Academy of Sciences
2011-2023
University of Chinese Academy of Sciences
2011-2023
Donghua University
2022
Beijing University of Chemical Technology
2013-2018
Dalian Institute of Chemical Physics
2011-2017
Collaborative Innovation Center of Chemistry for Energy Materials
2017
Dalian National Laboratory for Clean Energy
2011-2017
Dalian University
2014
Anyang Normal University
2013
Carbenium ions in zeolites: Two important carbenium have been observed for the first time under working conditions of methanol-to-olefins (MTO) reaction over chabazite zeolites using 13C NMR spectroscopy. Their crucial roles MTO cycles demonstrated by combining experiments and theoretical calculations. As a service to our authors readers, this journal provides supporting information supplied authors. Such materials are peer reviewed may be re-organized online delivery, but not copy-edited or...
The heptamethylbenzenium cation (heptaMB(+)) has been speculated to be one of the most important active intermediates involved in "hydrocarbon pool" mechanism methanol-to-olefin (MTO) conversion. By use DNL-6, a newly synthesized SAPO-type molecular sieve with large cavities, heptaMB(+) for first time directly observed during methanol conversion under real working conditions. (13)C-labeling experiments suggested that olefin formation mediated by mainly follows side-chain mechanism.
Different templates usage for mesoporous ZSM-5 synthesis and their catalytic properties were systematically investigated.
The mechanism of the methanol to olefin (MTO) reaction over AlPO-18 (without Brønsted acid sites) and two SAPO-18 (with different site densities) catalysts has been investigated. density was determined by 1H MAS NMR spectroscopy. Methanol conversion showed that catalytic activity strongly influenced their density. Using 13C magic angle spinning (MAS) NMR, we directly observed pentamethylcyclopentenyl cation (pentaMCP+) under real MTO conditions, but no carbenium ion detected AlPO-18....
Formation of adamantane hydrocarbons and their confinement in SAPO-34 caused the long induction period quick catalyst deactivation methanol conversion. Via ship-in-a-bottle synthesis, methyladamantanes could be produced from conversion cage 8-ring SAPO catalysts under very mild reaction conditions.
Abstract The methanol‐to‐olefins (MTO) process is becoming the most important non‐petrochemical route for production of light olefins from coal or natural gas. Maximizing generation target products, ethene and propene, minimizing byproducts coke, are major considerations in efficient utilization carbon resource methanol. In present work, heterogeneous catalytic conversion methanol was evaluated by performing simultaneous measurements volatile products generated gas phase confined coke...
Lithium recovery from an aqueous resource was accelerated by electrochemically driving the transformation of MnIV /MnIII with a spinel λ-MnO2 film electrode. A electrode without binders or conductive additives is preferred for achieving large capacity at high current density and long-term cycling capability. In this study, Mn(OH)2 first deposited on surface Pt graphite substrates owing to alkalization near cathode, then it oxidized Mn3 O4 air, followed being hydrothermally lithiated LiMn2...
Water security is the backbone of regional development. However, it generally compromised by increasing competition for water resources between natural and social systems, especially in areas with limited resources. Sustainable planning requires a comprehensive analysis supply demand patterns, which difficult owing to scale mismatches data methodologies. This study investigated dynamics interrelationships semi-arid watershed Loess Plateau, China, developing system model that simulates during...
A three-dimensional porous H<sub>2</sub>TiO<sub>3</sub>-type lithium ion-sieve prepared by polystyrene colloidal microspheres template was applied to selectively adsorb Li<sup>+</sup> ions from the strong alkaline Bayer liquor.
Carbeniumionen in Zeolithen: Mit 13C-NMR-Spektroskopie wurden erstmals zwei wichtige unter Bedingungen der Methanol-zu-Olefin(MTO)-Reaktion über Chabazit-Zeolithen beobachtet. Die entscheidenden Rollen dieser Ionen im MTO-Zyklus mithilfe kombinierter experimenteller und theoretischer Studien aufgezeigt. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed may be re-organized for online delivery, but...
Wetspun nascent PAN fibers were immersed into a DMSO/H 2 O coagulation bath. Diffusion of DMSO from fiber and that H studied at different temperatures concentrations The diffusion coefficient is larger than DMSO. As the bath temperature increased, coefficients increased. activation energy smaller during diffusion. Cross sectional surface structure observed in relation to ability (the product two solvents). Coagulation was found have significant influence on both cross morphology fiber. To...
High-power laser system has a requirement for the medium and low spatial wavefront errors of transmitted filter, which is spherical lens with long focal length (> 10 m) large aperture 400×400 (mm)). Two interferometric methods are analyzed compared testing an instantaneous interferometer, using -aperture plane mirror concave as retroflectors, respectively. The two kinds beam path -arrangements designed ray tracing method. Wavefront aberration modulation transfer function used merit...
Turbine blade is one of the key components turbomachinery, and machining quality its airfoil surface has an important impact on operating efficiency, service life, safety turbine. Robotic abrasive belt grinding become means machining. Based self-developed robot system, this paper proposes a scanner-based system calibration method to determine relationships among coordinate systems measurement, base, tool, workpiece. An accurate efficent workpiece based rapid segmentation point cloud using...
Abstract Under mild reaction conditions, both cis‐ and trans‐1,2‐substituted alkenes are converted into the corresponding 1,2,3‐trisubstituted cyclopropanes with high levels of diastereo‐ enantioselectivity using diazoacetate (III) as carbene source bisoxazolines (I) bearing C 2 ‐symmetry‐breaking pendant groups ligands in title copper‐catalyzed reaction.