Experimental study on removals of SO sub(2) and NO sub(X) using adsorption of activated carbon/microwave desorption

• Published in: Journal of the Air & Waste Management Association (1995) Vol. 62; no. 9; pp. 1012 - 1021
• Main Authors: Ma, Shuang-chen, Yao, Juan-juan, Gao, Li, Ma, Xiao-ying, Zhao, Yi
• Format: Journal Article
• Language: English
• Published: 01.09.2012
• Subjects: Activated carbon; Adsorption; Carbon dioxide; Desulfurizing; Flues; Microwaves; Sulfur dioxide; Waste management
• ISSN: 1096-2247
• DOI: 10.1080/10962247.2012.695320

Experimental studies on desulfurization and denitrification were carried out using activated carbon irradiated by microwave. The influences of the concentrations of nitric oxide (NO) and sulfur dioxide (SO sub(2)), the flue gas coexisting compositions, on adsorption properties of activated carbon and efficiencies of desulfurization and denitrification were investigated. The results show that adsorption capacity and removal efficiency of NO decrease with the increasing of SO sub(2) concentrations in flue gas; adsorption capacity of NO increases slightly first and drops to 12.79 mg/g, and desulfurization efficiency descends with the increasing SO sub(2) concentrations. Adsorption capacity of SO sub(2) declines with the increasing of O sub(2) content in flue gas, but adsorption capacity of NO increases, and removal efficiencies of NO and SO sub(2) could be larger than 99%. Adsorption capacity of NO declines with the increase of moisture in the flue gas, but adsorption capacity of SO sub(2) increases and removal efficiencies of NO and SO sub(2) would be relatively stable. Adsorption capacities of both NO and SO sub(2) decrease with the increasing of CO sub(2) content; efficiencies of desulfurization and denitrification augment at the beginning stage, then start to fall when CO sub(2) content exceeds 12.4%. The mechanisms of this process are also discussed.