Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume 45, Issue 2, Pages 706-711Publisher
AMER CHEMICAL SOC
DOI: 10.1021/es1020586
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Funding
- High-Tech R&D Program of China (863) [2007AA06Z340]
- NSFC [21077073]
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In order to overcome the shortcomings of the traditional catalytic oxidation (TCO) mode for the conversion of the trace level of elemental mercury (Hg-0) in flue gas, we put forward a novel and unique assembly that integrated membrane delivery with catalytic oxidation systems (MDCOs), which combined the controlled delivery of oxidants with the catalytic oxidation of Hg-0. The results show that the demanded HCl for Hg-0 conversion in the MDCOs was less than 5% of that in the TCO mode, and over 90% of Hg-0 removal efficiency can be obtained in the MDCOs with less than 0.5 mg m(-3) of HCl escaped. Meanwhile, the inhibition of SO2 to Hg-0 catalytic conversion in the MDCOs was also less significant than in the TCO. The MDCOs have high retainability for HCl, which is quite favorable to Hg-0 conversion and HCl utilization. The reaction mechanism on mercury conversion in the MDCOs is discussed. The MDCOs appear to be a promising method for emission control of elemental mercury.
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