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超临界流体在环境保护中的应用和展望 总被引:1,自引:0,他引:1
超临界流体技术广泛应用于化工、医药、生物、食品、陶瓷等领域。将超临界流体技术用于环境保护则是一个新的研究方向,由于该技术对废物处理具有经济、快速、高效等特点,近几年来发展异常迅速。综述了超临界流体的特性以及超临界流体技术(超临界萃取、超临界色谱和超临界水氧化)在环境保护方面的应用现状。 相似文献
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超临界流体及其在萃取中的应用 总被引:1,自引:0,他引:1
综述了超临界流体、超临界流体萃取技术及其在工业生产中的应用等,着重介绍了超临界流体萃取的原理和萃取装置,并对超临界流体萃取的发展新趋势作了分析。 相似文献
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超临界流体在化学反应中的应用 总被引:1,自引:0,他引:1
综述了临界流体的性质及超临界流体在化学反应中一的些应用。主要介绍了超临界流体在F-T合成反应、1-己烯异构化反应、氧化反应和烷基化反应中的应用。 相似文献
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对微孔发泡材料制备技术的研究进展进行了综述,对微孔发泡技术的基本原理、常用发泡剂和微孔发泡材料的制备方法等方面进行了详细的介绍和分析。微孔发泡材料的制备大体上可分为间歇法、注射成型法和连续挤出法,各种方法各有其优点和适用的领域。 相似文献
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文章阐述了超临界流体分离技术的原理、流程与特点.综述了该技术在分离工程领域的应用方向、存在的问题及未来的发展前景.指出了该技术兼具精馏和萃取两种分离作用效果,在天然资源成份的分离提取、脱除有害成份或杂质、清洗、色谱分析等诸多领域部有着其独特的开发应用优势. 相似文献
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Due to the pressing needs to develop and improve compressors to be used in supercritical carbon dioxide Brayton (S-CO2) cycle, a 3D numerical study has been carried out for the full S-CO2 compressor geometry including diffuser and volute. The predictions were compared with measurements obtained from the recently constructed S-CO2 compressor test facility called SCO2PE (Supercritical CO2 Pressurizing Experiment), based on existing liquid water technology. The objective of the experimental and numerical work is to obtain fundamental data for the design optimization of compressor and to measure the overall performance near the critical point and in the supercritical state.To simulate nonlinear behavior near the critical point of CO2, the fluid properties were implemented, via property table, in the computational analysis code. Before embarking in the CFD approach evaluation, a number of parametric runs were conducted to examine the order of errors induced by the property table resolution and to achieve grid convergence.The steady-state numerical predictions using the k–ω SST model were found to return satisfactory results for liquid water and in the case of S-CO2 operating condition, quite far from the critical point. However, as the compressor operating condition approaches more toward the critical point; deviation from the reference data start to become more apparent. In the more challenging case, the disagreement with experimental data might be partially due to the modeling limitations but is also attributed to the subcritical region observed in the contour plot of the static pressure. 相似文献
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An apparatus for measuring the solubility of gas in liquid and that of liquid or solid in gas has been constructed. The apparatus can be used at system temperatures ranging from 20 to 70°C and at system pressures up to 15 MPa. The solubilities were determined by means of gravimetric measurements. The solubilities measured in this study for the carbon dioxide+n-decane and carbon dioxide + naphthalene systems agree very well with the literature values. The vapor-liquid equilibria of the carbon dioxide+Peace River bitumen system at 45 and 55 °C were studied. The new data indicate that the supercritical-fluid carbon dioxide can extract a fair amount of the light components from Peace River bitumen. 相似文献
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聚合物微发泡材料制备技术应用研究进展 总被引:4,自引:1,他引:3
20世纪90年代末,超临界流体(SCF)制备聚合物微发泡材料实现了工业化,这种方法制备的微发泡材料具有非常多的优点,被誉为"21世纪的新型材料"。主要介绍了聚合物微发泡材料应用研究方面的进展,主要涉及聚合物微发泡材料的制备方法及其特点,工艺参数对成型过程的影响及成型设备的特点等方面,重点探讨了非连续方法和连续方法的提出及其发展过程。 相似文献