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Emission Control of NO and SO2 for the High-Temperature and Low O2 Concentration Combustion of Coke by Urea and NH4HCO3 |
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| Authors: | Hocheol Song Seokheung Chang Kwinam Park Ho-chul Shin Jin-won Park Eung-soo Choi Wan-wook Huh |
| Affiliation: | 1Postdoctoral Faculty Member, Dept. of Chemical Engineering, Yonsei Univ., Shinchon-dong 134, Seodaemoon-gu, Seoul, 120-749, Republic of Korea. 2PhD Candidate, Dept. of Chemical Engineering, Yonsei Univ., Shinchon-dong, 134, Seodaemoon-gu, Seoul, 120-749, Republic of Korea. 3Professor, Dept. of Chemical Engineering, Yonsei Univ., Shinchon-dong 134, Seodaemoon-gu, Seoul, 120-749, Republic of Korea (corresponding author). E-mail: jwpark@yonsei.ac.kr 4Researcher, Iron and Steel Research Team, Technical Research Laboratories, POSCO, Pohang P.O. Box 36, Koedong-dong 1, Nam-ku, Pohang, Kyungbuk, 790-785, Republic of Korea. 5Head Researcher, Iron and Steel Research Team, Technical Research Laboratories, POSCO, Pohang P.O. Box 36, Koedong-dong 1, Nam-ku, Pohang, Kyungbuk, 790-785, Republic of Korea. |
| Abstract: | Urea and NH4HCO3 were used to control the emission of NO and SO2 from the combustion of coke at high-temperature and low oxygen concentration. Urea and NH4HCO3 could control NO emission only under 1100°C. Their effects disappeared above 1100°C even though the increase of urea and NH4HCO3 content from 10?to?50?wt?%. However, they showed good desulfurization effect on the emission of SO2 at all combustion temperatures and their effects showed remarkable results even at 1500°C. Only 10?wt?% of urea or NH4HCO3 could control the emission of SO2 effectively at 1400 and 1500°C. This effect was caused by ?NH and ?NH2 from the thermal decomposition of reducing agents at high temperature. Low O2 concentration showed little effect on the removal of SO2. Ammonia slip from the thermal decomposition of reducing chemical was not a considerable level. |
| Keywords: | Emission control Temperature Combustion Fossil fuels Pollutants Air pollution |