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URN etd-0826113-163350 Statistics This thesis had been viewed 690 times. Download 0 times. Author Pei-Shan Chien Author's Email Address No Public. Department Chemical Engineering Year 2012 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 117 Title PARA-XYLENE REMOVAL FROM PURIFIED TEREPHTHALIC ACID PROCESS WASTEWATER BY ACTIVATED CARBON ADSORPTION Keyword Activated carbon Adsorption P-xylene Regeneration Terephthalic acid Terephthalic acid Regeneration P-xylene Adsorption Activated carbon Abstract Terephthalic acid is widely used in a variety of petrochemical products, such as polyethylene terephthalate, polyester fiber, and polyester film. Due to its growing demand globally especial in Asian countries, many purified terephthalic acid plants have been and are to be built that generate large quantity of wastewater with very high amount of organic content. In a crude terephthalic acid purification process, p-xylene was used to extract and recycle p-toluic acid to the crude terephthalic acid process; the resultant wastewater stream was sent to water recovery system using membranes. The residual p-xylene in the wastewater stream could damage the membranes due to its reaction with the membranes. Therefore, this study used activated carbon adsorption to remove p-xylene from the simulated wastewater of the p-xylene extraction unit. Activated carbon regeneration method and the performance of regenerated carbon on p-xylene adsorption were also evaluated. The experimental results showed that p-xylene in the wastewater could be successfully removed by an activated carbon fixed bed and super-heated steam could effectively regenerate the activated carbon to restore its p-xylene adsorption capability. Advisor Committee Jia-Ming Chern - advisor
Files Date of Defense 2013-07-26 Date of Submission 2013-08-26