Effect of Fly Ash on Catalytic Removal of Gaseous Dioxins over V2O5-WO3 Catalyst of a Sinter Plant

NCUIR > Engineering College > Graduate Institute of Environmental Engineering > journal & Dissertation > Item 987654321/27224

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/27224

Title:	Effect of Fly Ash on Catalytic Removal of Gaseous Dioxins over V2O5-WO3 Catalyst of a Sinter Plant
Authors:	Chang,SH;Chi,KH;Young,CW;Hong,BZ;Chang,MB
Contributors:	環境工程研究所
Keywords:	DE-NOVO-SYNTHESIS;FLUE-GAS;DECOMPOSITION;DESTRUCTION;COMBUSTION;PCDD/F;CHLOROBENZENE;DIBENZOFURANS;HYDROCARBONS;INCINERATOR
Date:	2009
Issue Date:	2010-06-29 18:20:39 (UTC+8)
Publisher:	中央大學
Abstract:	A PCDD/F (polychlorinated dibenzo-p-dioxin and dibenzofuran)containing gas stream generating system was developed to investigate the efficiency and effectiveness of V2O5-WO3 catalyst for PCDD/F destruction. Catalytic decomposition of PCDD/Fs (simulated gas streams) was evaluated with lab-scale pelletized and plate-type catalyst based on V2O5-WO3/TiO2 at controlled temperature, space velocity, and inlet PCDD/F concentration. Due to the lower porosity of the pelletized catalyst, PCDD/F destruction efficiencies reach 72.9-83.2% for different levels of inlet PCDD/F concentrations (1.08-3.04 ng-TEQ/Nm(3)) of the gas stream (space velocity: 5000 h(-1)). As the surface area is increased from 287 m(2)/m(3) (plate-type A) to 550 m(2)/m(3) (plate-type B), the PCDD/F destruction achieved with plate-type catalyst increases from 76.0% to 85.3% at 320 degrees C (space velocity: 5000 h(-1)). In addition, the results of pilot-scale experiment (real flue gases of a sinter plant) indicate that relatively lower PCDD/F destruction efficiencies (62.1-65.7%) were achieved with the plate-type B catalyst as the solid-phase PCDD/F and fly ash passed through the reactor (space velocity: 5000 h(-1)). Overall, the lab-scale and pilot-scale experiments indicate that PCDD/F destructions achieved with pelletized and plate-type catalysts strongly depend on the operating temperature of the catalyst. The results also indicate that the presence of fly ash the lowers PCDD/F destruction due to significant PCDD/F formation via de novo synthesis at 320 degrees C.
Relation:	ENVIRONMENTAL SCIENCE & TECHNOLOGY
Appears in Collections:	[Graduate Institute of Environmental Engineering ] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	595	View/Open

社群 sharing

Loading...