NDLI: Removal of SO$_{2}$ from Gas Streams by Oxidation using Plasma-Generated Hydroxyl Radicals

Content Provider	Springer Nature Link
Author	Bai, Mindong Zhang, Zhitao Bai, Mindi Yi, Chengwu Bai, Xiyao
Copyright Year	2006
Abstract	The key problem for the removal of SO$_{2}$ by electrical discharge methods is how to obtain the hydroxyl radicals at high concentration and large production rates. With the micro-gap discharge method, O$_{2}$ and H$_{2}$O in simulated gas streams (N$_{2}$/O$_{2}$/H$_{2}$O/SO$_{2}$) are ionized into a large number of OH$^{.}$ radicals to oxidize SO$_{2}$ into SO$_{3}$ which reacts with H$_{2}$O forming H$_{2}$SO$_{4}$ droplets at 120 °C in the absence of any catalyst or absorbent. The droplets are captured with an electrostatic precipitator. As a result, conversion of SO$_{2}$ to primarily H$_{2}$SO$_{4}$ is limited by the generation of OH$^{.}$ radicals. By increasing the reduced field and concentrations of O$_{2}$ and H$_{2}$O, the amount of OH$^{.}$ radicals increase resulting in more removal of SO$_{2}$ from gas streams. The removal efficiency of SO$_{2}$ reaches 100% when the residence time is only 0.74 s. Therefore, a new gas-phase oxidation method for removal of SO$_{2}$ without NH$_{3}$ additive is found.
Starting Page	177
Ending Page	186
Page Count	10
File Format	PDF
ISSN	02724324
Journal	Plasma Chemistry and Plasma Processing
Volume Number	26
Issue Number	2
e-ISSN	15728986
Language	English
Publisher	Springer US
Publisher Date	2006-04-07
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Micro-gap discharge OH$^{.}$ radials H$_{2}$SO$_{4}$ droplet Removal of SO$_{2}$ Nuclear Physics, Heavy Ions, Hadrons Inorganic Chemistry Mechanical Engineering Characterization and Evaluation of Materials Mechanics
Content Type	Text
Resource Type	Article
Subject	Chemistry Surfaces, Coatings and Films Condensed Matter Physics Chemical Engineering

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