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

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

Bibliographic Details
Main Author: Khopade, Akshay A.
Language:English
Published: University of Cincinnati / OhioLINK 2019
Subjects:
Environmental Science
Polychlorinated Biphenyls
Catalytic hydro dechlorination
Remediation
POPs
Reaction Kinetics
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563872151644231
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-ucin15638721516442312021-08-03T07:12:04Z Kinetic Analysis for Low Temperature Catalytic Hydro De-chlorination of PCBs (Poly-Chlorinated Biphenyls) Khopade, Akshay A. Environmental Science Polychlorinated Biphenyls Catalytic hydro dechlorination Remediation POPs Reaction Kinetics 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 3PCB 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. 2019-11-04 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563872151644231 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563872151644231 unrestricted This thesis or dissertation is protected by copyright: some rights reserved. It is licensed for use under a Creative Commons license. Specific terms and permissions are available from this document's record in the OhioLINK ETD Center.
collection NDLTD
language English
sources NDLTD
topic Environmental Science
Polychlorinated Biphenyls
Catalytic hydro dechlorination
Remediation
POPs
Reaction Kinetics
spellingShingle Environmental Science
Polychlorinated Biphenyls
Catalytic hydro dechlorination
Remediation
POPs
Reaction Kinetics
Khopade, Akshay A.
Kinetic Analysis for Low Temperature Catalytic Hydro De-chlorination of PCBs (Poly-Chlorinated Biphenyls)
author Khopade, Akshay A.
author_facet Khopade, Akshay A.
author_sort Khopade, Akshay A.
title Kinetic Analysis for Low Temperature Catalytic Hydro De-chlorination of PCBs (Poly-Chlorinated Biphenyls)
title_short Kinetic Analysis for Low Temperature Catalytic Hydro De-chlorination of PCBs (Poly-Chlorinated Biphenyls)
title_full Kinetic Analysis for Low Temperature Catalytic Hydro De-chlorination of PCBs (Poly-Chlorinated Biphenyls)
title_fullStr Kinetic Analysis for Low Temperature Catalytic Hydro De-chlorination of PCBs (Poly-Chlorinated Biphenyls)
title_full_unstemmed Kinetic Analysis for Low Temperature Catalytic Hydro De-chlorination of PCBs (Poly-Chlorinated Biphenyls)
title_sort kinetic analysis for low temperature catalytic hydro de-chlorination of pcbs (poly-chlorinated biphenyls)
publisher University of Cincinnati / OhioLINK
publishDate 2019
url http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563872151644231
work_keys_str_mv AT khopadeakshaya kineticanalysisforlowtemperaturecatalytichydrodechlorinationofpcbspolychlorinatedbiphenyls
_version_ 1719456409868828672

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