Pilot-Scale Demonstration of the OSCAR Process for High-Temperature Multipollutant Control of Coal Combustion Flue Gas, Using Carbonated Fly Ash and Mesoporous Calcium Carbonate
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- 作者：Himanshu Gupta ; Theodore J. Thomas ; Ah-Hyung A. Park ; Mahesh V. Iyer ; Puneet Gupta ; Rajeev Agnihotri ; Raja A. Jadhav ; Harold W. Walker ; Linda K. Weavers ; Tarunjit Butalia ; Liang-Shih Fan
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2007
- 出版时间：July 4, 2007
- 年：2007
- 卷：46
- 期：14
- 页码：5051 - 5060
- 全文大小：366K
- 年卷期：v.46,no.14(July 4, 2007)
- ISSN：1520-5045
文摘
A pilot-scale study of the Ohio State Carbonation Ash Reactivation (OSCAR) process was performed todemonstrate the reactivity of two novel calcium-based sorbents toward sulfur and trace heavy metal (arsenic,selenium, and mercury) capture in the furnace sorbent injection (FSI) mode on a 0.365 m3/s slipstream of abituminous coal-fired stoker boiler. The sorbents were synthesized by bubbling CO2 to precipitate calciumcarbonate (a) from the unreacted calcium present in the lime spray dryer ash and (b) from calcium hydroxideslurry that contained a negatively charged dispersant. The heterogeneous reaction between these sorbents andSO2 gas occurred under entrained flow conditions by injecting fine sorbent powders into the flue gas slipstream.The reacted sorbents were captured either in a hot cyclone (~650 
C) or in the relatively cooler downstreambaghouse (~230 C). The baghouse samples indicated ~90% toward sulfation and captured arsenic, seleniumand mercury to 800 ppmw, 175 ppmw and 3.6 ppmw, respectively.
C) or in the relatively cooler downstreambaghouse (~230 C). The baghouse samples indicated ~90% toward sulfation and captured arsenic, seleniumand mercury to 800 ppmw, 175 ppmw and 3.6 ppmw, respectively.