A5065702902- Analytical Chemistry and Chromatography
- Catalytic Processes in Materials Science
- Analytical Chemistry and Sensors
- Nanomaterials for catalytic reactions
- Catalysis and Oxidation Reactions
- Advanced Chemical Sensor Technologies
- Metal-Organic Frameworks: Synthesis and Applications
- Thermochemical Biomass Conversion Processes
- Inorganic and Organometallic Chemistry
- Graphene research and applications
- Granular flow and fluidized beds
- Thermal and Kinetic Analysis
- Electrochemical sensors and biosensors
- Adsorption and biosorption for pollutant removal
- Catalysts for Methane Reforming
- Water Quality Monitoring and Analysis
- Carbon dioxide utilization in catalysis
- Advanced Photocatalysis Techniques
- CO2 Reduction Techniques and Catalysts
- Chemical Synthesis and Reactions
- Mesoporous Materials and Catalysis
- Ga2O3 and related materials
- Catalysis for Biomass Conversion
- Analytical Methods in Pharmaceuticals
- Energetic Materials and Combustion
Xiangtan University
2010-2024
Abstract A novel gas–solid Micro Fluidized Bed Reaction Analyzer (MFBRA) was developed to deduce reaction rates and kinetic parameters through measuring time‐dependent composition changes of evolved gases from the reactions. Application MFBRA decomposition CaCO 3 powder resulted in an apparent activation energy 142.73 kJ/mol a pre‐exponential factor 399,777 s −1 . This much lower than thermogravimetry‐measured value 184.31 kJ/mol, demonstrating quicker MFBRA. further verified by CuO...
Graphene exhibits both excellent stretch and specific surface area. As a consequence, graphene has attracted immense attention for its applications lately. It worked well when bonded with copper composites. Unfortunately, however, there are little of such To facilitate researchers to work better in the future, this article reviews synthesis. There two routes, including direct synthesis indirect synthesis, which could be used prepare copper/graphene. Simultaneously, development prospects...
The GQDs/BWO composites consisting of size-controllable GQDs and Bi<sub>2</sub>WO<sub>6</sub>nanosheets were synthesized, they exhibited an excellent photocatalytic activity.
A Cu/ZrO<sub>2</sub>-RGO catalyst prepared by hydrothermal synthesis of a ZrO<sub>2</sub>-RGO carrier has highly dispersed Cu nanoparticles and resistance to sintering.
本研究以三聚氰胺作为碳源和氮源,经高温热解制得具有核壳结构氮掺杂碳(CN)包覆的Cu-ZrO2(CZ)纳米催化剂(CZ@CN催化剂),并研究了铜与三聚氰胺不同物质的量比对催化剂的影响.采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)、N2物理吸脱附测试(BET)、H2程序升温还原(H2-TPR)等表征技术分析了催化剂的形貌结构及物化性质.考察了催化剂用于二乙醇胺脱氢的催化性能.在铜与三聚氰胺物质的量比为4:1时,制备的CZ@CN催化剂催化活性最高,亚氨基二乙酸钠收率达92.8%,与普通CZ催化剂相比,反应时间缩短了40%,催化剂重复使用8次后收率依然达到88.4%.结果表明,适度的CN层的引入使催化剂具有更多的Lewis碱性位,在脱氢反应中有利于羟基的活化及氢的转移.同时CN层还可以稳定铜纳米颗粒,提高催化剂稳定性.
An indirect photometric detection method for the determination of hexane in acid cluster caprolactam by high performance liquid chromatography was developed. Ultraviolet (UV) absorption background reagents were added mobile phase, and hexane, nonabsorption ultraviolet region, directly determined a UV detector. The effects phase composition, species concentration etc. on analyzed results studied. optimization separation performed an Agilent HC-C18 column (250 mm x 4.6 mm, 5 microm). A...
Cu/Co3O4-ZrO2 catalyst was synthesized by a simple co-precipitation method, and its self-oxidation behavior after reduction reduced the particle size of Co3O4. demonstrated high performance during dehydrogenation diethanolamine, reaching 96% yield iminodiacetic in 30 min. The characterized XRD, XPS, TEM, SEM, H2-TPR. results showed that strong Cu-oxide interactions, co-catalysis biactive components, higher number oxygen vacancies were responsible for enhanced catalytic activity...
An improved anion-exchange chromatographic method was developed for simultaneous quantification of 1-sulfo-cyclohexane carboxylic acid (SCCA) and sulfate anion in the by-products caprolactam. strong column an ultraviolet (UV) detector were chosen assay SCCA anion. Non-chromophore-containing is not directly adaptable to commonly used detection high performance liquid chromatography (HPLC). This paper reports development validation HPLC based on indirect detection. ultraviolet-absorbing...
Pyrolysis of oil shale was studied in a fixed bed reactor with internals consisting number heat transfer enhancing plates and pyrolysis gas collection channel the center. Same experiment also conducted without for comparison. The characteristics were verified terms heating rate shale, products yield, quality produced composition. results showed that significantly enhanced transferring material reactor, improving around twice compared internals. Correspondingly, Yilan (shale oil) yield as...
A simple and rapid method is reported for the determination of diethanolamine (DEA) in dehydrogenation reaction solutions. Based on ion chromatography with conductivity detection, eluent its concentration, column temperature, flow rate were optimized. The analysis was done a cation 4.0 mM methanesulfonic acid (MSA) as at 1.0 mL/min temperature 313 K. Under optimal conditions, satisfactory linearity exhibited correlation coefficient 0.9993. separation high salinity matrix (Na+) completed...
摘要:
Solvent extraction studies have been carried out for the recovery of cyclohexanecarboxylic acid (CCA) from simulated waste fluid. Influences various parameters including extractant types, pH solution, equilibration time, and initial concentrations CCA, etc., were studied. A mixture toluene 1-octanol (90:10, v/v) was found suitable extraction. The results showed that solution had a great effect on distribution ratio, CCA could be efficiently extracted when lower than 3.5. quite rapidly. ratio...