Kinetic and Transport Processes in Supercritical Fluid Extraction

超临界流体萃取中的动力学和传输过程

• 批准号: 8700092
• 负责人: Benjamin McCoy
• 金额: $ 10万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-06-01 至 1990-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8700092&HistoricalAwards=false
• 关键词: Kinetic; Transport; Processes; Supercritical; Fluid

This project involves a study of supercritical fluid extraction with experimental techniques developed in the University of California laboratories. Arrested-flow and flow chromatography are used to measure transport and equilibrium properties for various solvent-solute systems at supercritical conditions. Binary bulk and intraparticle diffusivities are determined using the arrested-flow technique; and flow chromatography is applied to the measurement of dispersion, equilibrium adsorption, and adsorption rate coefficients. The second part of the study is the investigation of extraction processes. In particular, rates of regeneration will be measured for activated carbon containing caffeine and other adsorbates with solvents such as carbon dioxide and toluene.

本项目涉及利用加州大学实验室开发的实验技术对超临界流体萃取进行研究。阻滞流色谱法和流动色谱法用于测量超临界条件下各种溶剂-溶质体系的输运和平衡性质。采用阻流技术测定了二元体扩散系数和颗粒内扩散系数；并应用流动色谱法测量分散系数、平衡吸附系数和吸附速率系数。研究的第二部分是提取工艺的研究。特别是，将测量含有咖啡因的活性炭和其他吸附溶剂（如二氧化碳和甲苯）的再生速率。