Simultaneous desulfurization and denitrification by microwave reactor with ammonium bicarbonate and zeolite
- Resource Type
- Article
- Authors
- Wei, Zaishan; Lin, Zhehang; Niu, Hejingying; He, Haiming; Ji, Yongfeng
- Source
- Journal of Hazardous Materials. Mar2009, Vol. 162 Issue 2/3, p837-841. 5p.
- Subject
- *DESULFURIZATION
*DENITRIFICATION
*MICROWAVES
*AMMONIUM bicarbonate
*ZEOLITES
*SULFUR dioxide mitigation
*NITROGEN oxides & the environment
*FLUE gas desulfurization
*PURIFICATION of flue gases
- Language
- ISSN
- 0304-3894
Microwave reactor with ammonium bicarbonate (NH4HCO3) and zeolite was set up to study the simultaneous removal of sulfur dioxide (SO2) and nitrogen oxides (NO x ) from flue gas. The results showed that the microwave reactor filled with NH4HCO3 and zeolite could reduce SO2 to sulfur with the best desulfurization efficiency of 99.1% and reduce NO x to nitrogen with the best NO x purifying efficiency of 86.5%. Microwave desulfurization and denitrification effect of the experiment using ammonium bicarbonate and zeolite together is much higher than that using ammonium bicarbonate or zeolite only. NO x concentration has little effect on denitrification but has no influence on desulfurization, SO2 concentration has no effect on denitrification. The optimal microwave power and empty bed residence time (EBRT) on simultaneous desulfurization and dentrification are 211–280W and 0.315s, respectively. The mechanism for microwave reduced desulfurization and denitrification can be described as the microwave-induced catalytic reduction reaction between SO2, NO x and ammonium bicarbonate with zeolite being the catalyst and microwave absorbent. [Copyright &y& Elsevier]