研究目的
To study the supercritical water oxidation (SCWO) of o-dichlorobenzene (o-DCB) in a fused quartz capillary reactor using in situ microscope and Raman spectroscopy, investigating the influence of oxidant dosage, reaction temperature, and time on degradation efficiency and CO2 yield, and exploring reaction kinetics.
研究成果
The SCWO process effectively degrades o-DCB with high efficiency under optimal conditions (oxidant dosage 2.0 folds, temperature 440.0 °C, time 4 min). The degradation involves multi-step reactions with intermediate products, and kinetics follow pseudo-first-order with an activation energy of 172.4 kJ mol?1. The use of quartz micro-reactors allows for in situ observation and provides insights into reaction mechanisms, supporting potential industrial applications.
研究不足
The study is limited to laboratory-scale micro-reactors; scalability to industrial applications may face challenges. The use of specific quartz reactors might not be directly applicable to other materials. The focus on o-DCB may not generalize to other pollutants without further investigation.
1：Experimental Design and Method Selection:
The study used a fused quartz capillary reactor (FQCR) and fused quartz tube reactor (FQTR) for in situ observation and detection with a polarization microscope and Raman spectroscopy to investigate phase changes, degradation efficiency, and CO2 yield in supercritical water oxidation.
2：Sample Selection and Data Sources:
o-Dichlorobenzene (o-DCB) with purity >99% and H2O2 (30% wt) were used as reactants. Samples were prepared in quartz capillaries or tubes.
3：List of Experimental Equipment and Materials:
Equipment includes a sample chamber for heating and cooling (INS0908051, INSTEC, Inc.), polarization microscope (DM2500P, Leica), digital camera (TK-C1481, JVC), Raman spectrometer (Horiba JobinYvon), gas chromatograph (Agilent 6890), and quartz capillaries/tubes from Polymirco Technologies. Materials include o-DCB, H2O2, deionized water, ethanol, and other analytical reagents.
4：Experimental Procedures and Operational Workflow:
FQCR/FQTR were prepared by sealing reactants inside, heated in a chamber, observed with microscope and camera for phase changes, and analyzed with Raman spectroscopy for gas products and GC for liquid products after cooling and smashing. Conditions varied oxidant dosage (
5：0-0 folds), temperature (0-0 °C), and time (0-0 min). Data Analysis Methods:
Degradation efficiency and CO2 yield were calculated using formulas based on mass and Raman intensity. Kinetics analysis used pseudo-first-order model and Arrhenius equation for activation energy.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
