Journal of Industrial and Engineering Chemistry, Vol.10, No.1, 93-101, January, 2004
Removal of nitrogen oxides by using a nonthermal plasma-assisted catalytic process in the presence of ammonia
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This study investigates the removal of nitrogen oxides (NOx) by a nonthermal plasma reactor (dielectric-packed bed reactor) combined with a monolithic V2O5/TiO2 catalyst using NH3 as a reducing agent. The effect of initial NOx concentration, feed gas flow rate, humidity, oxygen content, and reaction temperature on the removal of NOx was examined in simulated exhaust gas mixtures. Increasing the fraction of NO2 in NOx, which is the main role of the plasma reactor, largely enhanced the NOx removal efficiency. In the presence of plasma discharge, the temperature dependence of catalytic removal of NOx, was very small. However, according to the scanning electron microscope images of the used catalysts, ammonium nitrate causing catalyst deactivation was observed to form below 443 K, indicating that the plasma-catalytic process should be operated at temperatures higher than 443 K. The results obtained from the parametric study show that the present system is not so sensitive to the changes in such variables as water vapor content, oxygen content and initial NOx concentration.
- Koebel M, Elsener M, Kleemann M, Catal. Today, 59(3-4), 335 (2000)
- Hammer T, Broer S, SAE Technical Paper Series 982428 (1998)
- Parvulescu VI, Grange P, Delmon B, Catal. Today, 46(4), 233 (1998)
- Koebel M, Elsener M, Chem. Eng. Sci., 53(4), 657 (1998)
- Lee DW, Ryu JH, Jeong DH, Lee HS, Chun KM, Lee KY, J. Ind. Eng. Chem., 9(1), 102 (2003)
- Roh HS, Park YK, Park SE, J. Ind. Eng. Chem., 9(4), 341 (2003)
- Miessner H, Francke KP, Rudolph R, Hammer T, Catal. Today, 75(1-4), 325 (2002)
- Civitano L, Non-Thermal Plasma Techniques for Pollution Control: Part B, B.M. Penetrante and S.E. Schultheis Ed., pp. 103-130, Springer-Verlag, Berlin (1993)
- Mok YS, Kim JH, Nam IS, Ham SW, Ind. Eng. Chem. Res., 39(10), 3938 (2000)
- Tas MA, Vanhardeveld R, Vanveldhuizen EM, Plasma Chem. Plasma Process., 17(4), 371 (1997)
- Rajanikanth BS, Rout S, Fuel Process. Technol., 74, 177 (2001)
- Woo IS, Kang HC, Cho JK, Hwang MW, Kang AS, Yamaguma M, J. Ind. Eng. Chem., 7(2), 105 (2001)
- Broer S, Hammer T, Appl. Catal. B: Environ., 28(2), 101 (2000)
- Penetrante BM, Brusasco RM, Merritt BT, Vogtlin GE, Pure Appl. Chem., 71, 1829 (1999)
- Hoard J, SAE Technical Paper Series 01FL-63 (2001)
- Mok YS, Koh DJ, Kim KT, Nam IS, Ind. Eng. Chem. Res., 42(13), 2960 (2003)
- Yoon S, Panov AG, Tonkyn RG, Ebeling AC, Barlow SE, Balmer ML, Catal. Today, 72(3-4), 243 (2002)
- Ravi V, Mok YS, Rajanikanth BS, Kang HC, Fuel Process. Technol., 81, 187 (2003)
- Park DW, Yoon SH, Kim GJ, Sekiguchi H, J. Ind. Eng. Chem., 8(4), 393 (2002)
- Manley TC, Trans. Electrochem. Soc., 84, 83 (1943)
- Kogelschatz U, Process Technologies for Water Treatment, S. Stucki Ed., pp. 87-120, Plenum Press, New York (1988)
- Atkinson R, Baulch DL, Cox RA, Hampson RF, Kerr JA, Troe J, J. Phys. Chem. Ref. Data, 21, 1125 (1992)
- Mazing H, Advances in Chemical Physics, Vol. LXXX, pp. 315-402, John Wiley & Sons, New York (1991)
- Mok YS, Nam IS, Chem. Eng. Technol., 22(6), 527 (1999)
- Sathiamoorthy G, Kalyana S, Finney WC, Clark RJ, Locke BR, Ind. Eng. Chem. Res., 38(5), 1844 (1999)
- Luck F, Roiron J, Catal. Today, 4, 205 (1989)