Effects of manganese oxide impregnation and flue gas conditions on simultaneous control of Hg0 and NO from coal-fired utility flue gases using SCR catalysts

Sheng Hsuan Hsiao, Chun Hsiang Chiu, Hong Ping Lin, Shiao Shing Chen, Tien Chin Chang, Hsing Cheng Hsi

研究成果: Conference contribution

摘要

This research investigated the effects of manganese oxide (MnOx) impregnation on the physical/chemical properties and simultaneous control of Hg0 and NO using a V2O5-WO3/TiO2-SiO2 selective catalytic reduction (SCR) catalyst. Raw and MnOx-treated SCR samples were bean-shaped nanoparticles with sizes of 10-30 nm. The decrease in surface area when the impregnated MnOx amount was 10 wt% may stem from the particle growth or aggregation for SCR catalyst. Mn4+ was the main valence state of impregnated MnOx. MnOx impregnation enhanced the removal of Hg0, NO, and SO2 with SCR catalyst. The 5 and 10% MnOx-impregnated samples had the greatest multipollutant control potentials for removing Hg0 and NO; however, the increasing SO2 removal that may be due to SO2-SO3 conversion should be concerned. HCl and O2 greatly promoted Hg0 oxidation. SO2 enhanced Hg0 oxidation at ≤200 ppm while NO and NH3 consistently inhibited Hg0 oxidation. Elevating flue gas temperature enhanced Hg0 oxidation. Overall, MnOx-impregnated catalyst shows stable and consistent multipollutant removal effectiveness.

原文English
主出版物標題108th Air and Waste Management Association Annual Conference and Exhibition, ACE 2015 - Connecting the Dots
主出版物子標題Environmental Quality to Climate
發行者Air and Waste Management Association
頁面397-403
頁數7
ISBN(電子)9781510815582
出版狀態Published - 2015
事件108th Air and Waste Management Association Annual Conference and Exhibition - Connecting the Dots: Environmental Quality to Climate, ACE 2015 - Raleigh, United States
持續時間: 2015 6月 222015 6月 25

出版系列

名字Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA
1
ISSN(列印)1052-6102

Other

Other108th Air and Waste Management Association Annual Conference and Exhibition - Connecting the Dots: Environmental Quality to Climate, ACE 2015
國家/地區United States
城市Raleigh
期間15-06-2215-06-25

All Science Journal Classification (ASJC) codes

  • 一般環境科學
  • 一般能源

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