NO removal by reducing agents and additives in the selective non-catalytic reduction (SNCR) process

• Published in: Chemosphere (Oxford) Vol. 65; no. 1; pp. 170 - 175
• Main Authors: Bae, Sang Wook, Roh, Seon Ah, Kim, Sang Done
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.09.2006; Elsevier
• Subjects: Air Pollutants - analysis; Alcohols - chemistry; Applied sciences; Atmospheric pollution; Combustion and energy production; Exact sciences and technology; Gas and liquid additives; Incineration - standards; Kinetics; Models, Chemical; Models, Structural; Nitrogen Oxides - analysis; NO x removal; Oxidation-Reduction; Pollution; Prevention and purification methods; Reducing agents; Reducing Agents - chemistry; SNCR (selective non-catalytic reduction); Temperature; VOC (volatile organic compound); Volatilization; NO x removal; Reducing agents; Gas and liquid additives; SNCR (selective non-catalytic reduction); VOC (volatile organic compound); NOx removal; Pollution control; Pollution prevention; Reducing agent; Operating conditions; Chemical reduction; Ammonia; Kinetic model; Additive; Combustion gas; Nitric oxide; Air pollution; Physicochemical purification; Flue gas purification; Organic compounds
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2006.02.040

The effect of the additives on the selective non-catalytic reduction (SNCR) reaction has been determined in a three-stage laboratory scale reactor. The optimum reaction temperature is lowered and the reaction temperature window is widened with increasing concentrations of the gas additives (CO, CH 4). The optimum reaction temperature is lowered and the maximum NO removal efficiency decreases with increasing the concentration of alcohol additives (CH 3OH, C 2H 5OH). The addition of phenol lowers the optimum reaction temperature about 100–150 °C similar to that of the toluene addition. The volatile organic compounds (VOCs: C 6H 5OH, C 7H 8) can be utilized in the SNCR process to enhance NO reduction and removed at the same time. A previously proposed simple kinetic model can successfully apply the NO reduction by NH 3 and the present additives.