Catalytic hydrodechlorination of PCDD/Fs from condensed water with Pd/γ-Al2O3

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Title:	Catalytic hydrodechlorination of PCDD/Fs from condensed water with Pd/γ-Al2O3
Authors:	張木彬;Liu, Mei-Chen;Chang, Shu-Hao;Chang, Moo-Been
Contributors:	工學院環境工程研究所
Date:	2016-07-01
Issue Date:	2026-04-23 15:00:12 (UTC+8)
Publisher:	Elsevier Ltd.
Abstract:	摘要： A continuous pyrolysis system (CPS) with effective air pollution control devices (APCDs) is designed and constructed to remediate the soil containing high-concentration PCDD/Fs. The quench tower of the APCDs system can capture the pollutants of high boiling points from the flue gas of CPS and produces condensed water of high PCDD/Fs concentration (16-44 ng I-TEQ/L), and needs further treatment. First, the result of activated carbon adsorption test displays the PCDD/Fs toxicity concentration of effluents meet the regulatory standards as the liquid to solid ratio is controlled at 3: 1. However, large amount of activated carbon need to achieve the high removal efficiency leads to high cost, so catalytic hydrodechlorination technology with Pd/Al2O3 as catalyst is applied to treat the condensed water. The PCDD/Fs mass removal efficiency achieved without the reducing agent is 53.21% with the operating time of 180 min. As 5% reducing agent (methanol) is added, the removal efficiency increases to 71.86%. In addition, to better understand the differences between molecular hydrogen and hydrogen donor, the condensed water was pre-aerated with hydrogen and catalytic hydrodechlorination test with palladium as catalyst was conducted. The results show that the PCDD/Fs mass removal efficiency increases to 97.34% with the operating time of 180 min, demonstrating the high PCDD/Fs removal efficiency of catalytic hydrodechlorination. 出版日期： 2016-07-01 出處： Chemosphere (Oxford), 2016-07, Vol.154, p.583-589 識別號： ISSN: 0045-6535 識別號： DOI: 10.1016/j.chemosphere.2016.03.135
Appears in Collections:	[Graduate Institute of Environmental Engineering ] journal & Dissertation

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