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Received August 17, 2009
Accepted August 25, 2009
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Microwave effect in removal process of NO by electron beam irradiation and quantitative prediction of the removed NO
School of Chemical Engineering and Technology, Yeungnam University, 214-1 Daedong, Gyeongsan, Gyeongbuk 712-749, Korea 1School of Civil and Environmental Engineering, Yeungnam University, 214-1 Daedong, Gyeongsan, Gyeongbuk 712-749, Korea
Korean Journal of Chemical Engineering, November 2009, 26(6), 1601-1607(7), 10.1007/s11814-009-0343-z
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Abstract
A flow process with electron beam (EB) irradiation carried out the removal of NO in air by adding microwave (MW) to improve the removal efficiency of NO. The EB irradiation combined with MW irradiation was very effective in the range of NO removal efficiency of 70-80% and reduced required doses up to more than 30%, compared to the flow process without MW. On the other hand, MW irradiation was unlikely to affect the NO removal above 90% of removal efficiency. In addition, MW effect appeared definitely in the dose ranges of 8-24 kGy, whereas the effect became minor below 8 kGy and above 24 kGy. This study found that MW irradiation can play an auxiliary role in NO removal with EB irradiation and the effect of MW on the NO removal is based on an intrinsic kinetic to the exclusion of a thermal effect. The concentrations of removed NO could be linearly correlated as ΔC=k[NO]o+ko. Where, k was proportional to dose and ko could be related to ko/D^(n)=aD+b, giving n value of 0.7 without MW irradiation and 0.4 with MW irradiation, respectively.
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Chmielewski AG, Licki J, Pawelec A, Tymi ski B, Zimek Z, Radiat. Phys. Chem., 71, 439 (2004)
