Kinetic study of coal extraction by tetralin with ultrasonic irradiation

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Title Kinetic study of coal extraction by tetralin with ultrasonic irradiation
Publication Type thesis
School or College College of Engineering
Department Chemical Engineering
Author Ching, Virginia Cheng Chen
Date 1967-06
Description This investigation was concerned with the kinetics of coal extraction by 1,2,3,4-tetrahydronaphthalene (tetralin) under the influence of ultrasonic waves. The coal used in this study was obtained from the working face of the Utah Spring Canyon Mine. The extraction of coal has been carried out at five different temperatures: 24° G, 29°C, 34*C, 44°C, and 54°C. At each of these temperatures the yield of extract increases rapidly in the early stages of extraction, levels off later to approach an asymptotic value. Analysis of the data from this study showed that a modified firstorder rate equation best describes the kinetics of the extraction process. In this study on the solvent extraction of coal, the enthalpy of activation (6.0 kcal/mole) was found to remain constant throughout the extraction process. However, an increase in free energy of activation ) that was observed is accounted for by a decrease in entropy of activation. The values of free energy of activation were found to be 24»5 kcal/mole during the early stages of the extraction process and 25.1 kcal/mole near the end of the extraction process. An experiment was conducted to see if tetralin undergoes decomposition when subjected to ultrasonic irradiation for 20 hours. The results show that no significant decomposition of tetralin occurs during the first 15 hours under ultrasonic irradiation and less than one percent of the tetralin was found to be decomposed at the end of 20 hours.
Type Text
Publisher University of Utah
Subject Ultrasonics; Metallurgy
Dissertation Institution University of Utah
Dissertation Name MS
Language eng
Relation is Version of Digital reproduction of "Kinetic study of coal extraction by tetralin with ultrasonic irradiation" J. Willard Marriott Library Special Collections TP 7.5 1967 C48
Rights Management © Virginia Cheng Chen Ching
Format application/pdf
Format Medium application/pdf
Format Extent 33,044 bytes
Identifier us-etd2,145223
Source Original: University of Utah J. Willard Marriott Library Special Collections
Conversion Specifications Original scanned on Kirtas 2400 and saved as 400 ppi 8 bit grayscale jpeg. Display image generated in Kirtas Technologies' OCR Manager as multiple page pdf, and uploaded into CONTENT dm.
ARK ark:/87278/s6vd7cxq
Setname ir_etd
ID 192442
Reference URL https://collections.lib.utah.edu/ark:/87278/s6vd7cxq
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