title: Treating PCDD/Fs by combined catalysis and activated carbon adsorption.
abstract: V2O5-WO3/TiO2 catalysts are used to destroy dioxins present in the gas phase, yet both their removal efficiency (RE) and destruction efficiency (DE) decrease with rising initial concentration (IC). Therefore, activated carbons (AC-1: based on lignite; AC-2: based on coconut shell) were mixed with the catalyst to tackle these high IC gases. A gas phase dioxin-generating system was used to supply three different stable IC-values. When the highest IC is used (20.5 ng I-TEQ Nm(-3)) without AC, at 200°C, the RE and DE-value of PCDD/Fs reaches only 76% and 64%, respectively. At the same conditions, using a mix of catalyst and AC-2, these RE and DE-values rise to 90.1% and 82.0%, respectively. The mix catalyst/AC also shows better performance at low temperature (160 and 180°C). The AC characteristics influence upon the adsorption and degradation abilities of the mixtures.
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China. Electronic address: 11027050@zju.edu.cn.
authors.forename: Sha-sha
authors.initials: SS
authors.lastname: Ji
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Ren
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Alfons
authors.initials: A
authors.lastname: Buekens
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Tong
authors.initials: T
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Sheng-yong
authors.initials: SY
authors.lastname: Lu
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Ke-fa
authors.initials: KF
authors.lastname: Cen
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China. Electronic address: lixd@zju.edu.cn.
authors.forename: Xiao-Dong
authors.initials: XD
authors.lastname: Li
mesh_terms: D000327:Adsorption; D000397:Air Pollution / Q000517:prevention & control*; D001572:Benzofurans / Q000737:chemistry*; D002384:Catalysis; D002606:Charcoal / Q000737:chemistry; D000072338:Dibenzofurans, Polychlorinated; D004147:Dioxins / Q000737:chemistry; D005740:Gases / Q000737:chemistry; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000737:chemistry
chemical_list: D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D004147:Dioxins; D005740:Gases; D000072317:Polychlorinated Dibenzodioxins; D002606:Charcoal
keywords: Activated carbon; Adsorption; Catalyst; Destruction; PCDD/Fs