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Kinetic Analysis for Low Temperature Catalytic Hydro De-chlorination of PCBs (Poly-Chlorinated Biphenyls)

Khopade, Akshay A
http://orcid.org/0000-0002-7640-0567
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563872151644231

Abstract Details

2019, MS, University of Cincinnati, Engineering and Applied Science: Materials Science.
The environmental report published by the United Nations in 2018 paints a very grim picture of our environmental health around the world. Persistent organic pollutants (POPs) like polychlorinated biphenyls (PCBs) are one of the major causes of this environmental degradation. The Stockholm Convention is a global treaty that seeks to contain additional contamination of environment with POPs and, wherever feasible, remediate the contamination that has already occurred. Although the production of PCBs has been banned around the world, affordable and effective PCB cleanup technologies are still in high demand, as existing treatment technologies are very costly. The project studies a low temperature removal technology using catalytic hydrogenation. Two types of PCBs were studied in a flask system, 3 PCB and 2, 3 PCB. The catalyst studied for the hydro de-chlorination reaction is palladium on activated carbon and triethylamine (Pd/C and Et3N). Parameters such as reaction time, gas flow rate and catalyst dose were investigated. In addition, the kinetics of the hydro de-chlorination reactions were studied, which is essential in large scale commercial applications. Reaction rate constants at different temperatures viz. 20C (room temperature), 50C and 80C, were investigated to better understand the activation energy. The de-chlorination rates at different temperatures were compared, which suggested a different optimum temperature for the hydro de-chlorination of 3 PCB and 2,3 - PCB. The Ea was 4.4 kJ/mole and 16.8 kJ/mole for 3 PCB and 2, 3 PCB respectively. The low Ea indicates that the reactions may be controlled by mass transfer of hydrogen.
Mingming Lu, Ph.D. (Committee Chair)
Gregory Beaucage, Ph.D. (Committee Member)
Fu-Min Ren, D.S. (Committee Member)
Zhiqiang (Mark) Wang, Ph.D. (Committee Member)
117 p.
Environmental Science
Polychlorinated Biphenyls; Catalytic hydro dechlorination; Remediation; POPs; Reaction Kinetics

Recommended Citations

Citations

  • Khopade, A. A. (2019). Kinetic Analysis for Low Temperature Catalytic Hydro De-chlorination of PCBs (Poly-Chlorinated Biphenyls) [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563872151644231

    APA Style (7th edition)

  • Khopade, Akshay. Kinetic Analysis for Low Temperature Catalytic Hydro De-chlorination of PCBs (Poly-Chlorinated Biphenyls). 2019. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563872151644231.

    MLA Style (8th edition)

  • Khopade, Akshay. "Kinetic Analysis for Low Temperature Catalytic Hydro De-chlorination of PCBs (Poly-Chlorinated Biphenyls)." Master's thesis, University of Cincinnati, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563872151644231

    Chicago Manual of Style (17th edition)

ucin1563872151644231
178
© 2019, some rights reserved.Creative Commons License Kinetic Analysis for Low Temperature Catalytic Hydro De-chlorination of PCBs (Poly-Chlorinated Biphenyls) by Akshay A Khopade is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Cincinnati and OhioLINK.