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Critical Fluid Extraction Of Organics From Water Volume Ii Experimental Final Report 1 October 1979 30 November 1983

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Critical Fluid Extraction Of Organics From Water Volume Ii Experimental Final Report 1 October 1979 30 November 1983

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Author :
language : en
Publisher:
Release Date : 1984

Critical Fluid Extraction Of Organics From Water Volume Ii Experimental Final Report 1 October 1979 30 November 1983 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with categories.

Critical fluid extraction has been tested at the pilot plant scale as a method of separating organics from water. The process employed resembles a liquid-liquid extraction in which the solvent is near-critical carbon dioxide and the feed is an organic in aqueous solution. Carbon dioxide's solvent and other thermodynamic properties, and the effective utilization of a vapor recompression cycle in the process design have significantly reduced the energy required for these separations. This process is an energy-conserving alternative to the distillation processes which are currently employed. The objectives of this portion of the project were to demonstrate the feasibility of this technology and to gather the engineering data required to evaluate the process. Three alcohols were tested in these experiments - ethanol, isopropanol and sec-butanol - and were all successfully extracted.

Critical Fluid Extraction Of Organics From Water Volume I Engineering Analysis Final Report 1 October 1979 30 November 1983

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Author :
language : en
Publisher:
Release Date : 1984

Critical Fluid Extraction Of Organics From Water Volume I Engineering Analysis Final Report 1 October 1979 30 November 1983 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with categories.

Critical-fluid extraction of several organic solutes from water was investigated analytically and experimentally to determine the energy conservation potential of the technology relative to distillation. This Volume gives the results of an engineering analysis. The process uses condensed or supercritical carbon dioxide as an extracting solvent to separate aqueous solutions of common organics such as ethanol, isopropanol and sec-butanol. Energy input to the systems is electric power to drive compressors. A detailed process analysis included evaluation and correlation of thermophysical properties and phase equilibria for the two- and three-component systems involved. The analysis showed that a plant fed with 10 weight percent ethanol feed would consume 0.65 kilowatt-hours (kwh) of power for compression energy per gallon of alcohol. This energy consumption would be 5300 Btu of steam-equivalent, or 6500 Btu of fossil-fuel-equivalent energy. The extraction product, however, would require additional energy to produce high-purity alcohol. Doubling the ethanol feed concentration to 20 weight percent would reduce the energy required to about 0.30 kwh per gallon. Halving the ethanol feed concentration to 5 weight percent would increase the energy required to about 1.35 kwh per gallon. For the same feed composition, isopropanol can be separated with 48% of the energy required for ethanol. The same separation of sec-butanol can be done with 25% of the ethanol energy requirement.