Temperature Impact on SO sub(2) Removal Efficiency by Ammonia Gas Scrubbing

• Published in: Energy conversion and management Vol. 44; no. 13; pp. 2175 - 2188
• Main Authors: He, Boshu, Zheng, Xianyu, Wen, Yan, Tong, Huiling, Chen, Meiqian, Chen, Changhe
• Format: Journal Article
• Language: English
• Published: 01.08.2003
• Subjects: Air pollution; Ammonia; Cleaning; Coal; Combustion; Efficiency; Emission; Fossil fuels; Gas scrubbing; Management; Pollutants; Power plants; Recovery; Sustainable development; China, People's Rep
• DOI: 10.1016/S0196-8904(02)00230-3
• ISSN: 0196-8904

Emissions reduction in industrial processes, i.e. clean production, is an essential requirement for sustainable development. Fossil fuel combustion is the main emission source for gas pollutants, such as NO sub(x), SO sub(2) and CO sub(2), and coal is now a primary energy source used worldwide with coal combustion being the greatest atmospheric pollution source in China. This paper analyzes flue gas cleaning by ammonia scrubbing (FGCAS) for power plants to remove gaseous pollutants, such as NO sub(x), SO sub(2) and CO sub(2), and presents the conceptual zero emission design for power plants. The byproducts from the FGCAS process can be used in agriculture or for gas recovery. Experimental results presented for SO sub(2) removal from the simulated flue gas in a continuous flow experiment, which was similar to an actual flue gas system, showed that the effectiveness of the ammonia injection or scrubbing depends on the temperature. The FGCAS process can effectively remove SO sub(2), but the process temperature should be below 60 degree C or above 80 degree C for SO sub(2) reduction by NH sub(3) scrubbing.