Influence of gas components on the oxidation of elemental mercury by positive pulsed corona discharge
SCIE
SCOPUS
- Title
- Influence of gas components on the oxidation of elemental mercury by positive pulsed corona discharge
- Authors
- Ko, KB; Byun, Y; Cho, M; Namkung, W; Hamilton, IP; Shin, DN; Koh, DJ; Kim, KT
- Date Issued
- 2008-09
- Publisher
- TAYLOR & FRANCIS LTD
- Abstract
- This study examines the effect of flue gas components on the oxidation of gaseous elemental mercury (Hg-0) to HgO and HgCl2 via pulsed corona discharge (PCD), where the reaction temperature was set to 90 degrees C and the gas stream consisting of 3% H2O and 10% O-2 in N-2 was mixed with 45 mu g m(-3) Hg-0, 108 ppm NOx, 80 ppm HCl, 200 ppm SO2 and 470 ppm NH3. It has been observed that O-2 and HCl components in the gas stream act as oxidizing precursors through the generation of oxidizing species (O, O-3, Cl and Cl-2) in the PCD process. The presence of NO directly hampers Hg-0 oxidation to HgO due to preferential reaction of NO with O and O-3. In contrast, the presence of SO2 indirectly influences the oxidation of Hg-0 to HgCl2 through the fast reaction of SO2 with OH radical, resulting in consuming OH radicals which are partially responsible for the formation of chlorine species, i. e. Cl and Cl-2. It has been also found that NH3 component significantly hinders the oxidation of Hg-0 to HgCl2 through the fast acid-base reaction with HCl.
- Keywords
- pulsed corona discharge; elemental mercury; oxidized mercury; HgO; HgCl(2); DIELECTRIC-BARRIER DISCHARGE; SIMULTANEOUS REMOVAL; NONTHERMAL PLASMA; FLUE-GAS; SO2; REACTOR; ATMOSPHERE; SPECIATION; INJECTION; EMISSIONS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/31122
- DOI
- 10.1080/102412208026
- ISSN
- 1024-1221
- Article Type
- Article
- Citation
- MAIN GROUP CHEMISTRY, vol. 7, no. 3, page. 191 - 204, 2008-09
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