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Vol. 28 No. 6 (2016): Vol 28 Issue 6

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A New Method for Treating Waste Gases Containing NOx with Low Concentration Based on Rare Earth Metal Complex

https://doi.org/10.14233/ajchem.2016.19665
Yanzhu Liu
School of Chemistry, Nanchang University, Nanchang 330031, P.R. China
Chen Zhou
School of Chemistry, Nanchang University, Nanchang 330031, P.R. China
Shihan Zhang
School of Chemistry, Nanchang University, Nanchang 330031, P.R. China
Xiuxin Zou
School of Chemistry, Nanchang University, Nanchang 330031, P.R. China
Yongxiu Li
School of Chemistry, Nanchang University, Nanchang 330031, P.R. China

Corresponding Author(s) : Yongxiu Li

yzliu@ncu.edu.cn; liuyanzhu_79@163.com

Asian Journal of Chemistry, Vol. 28 No. 6 (2016): Vol 28 Issue 6

Abstract

A novel method for removing exhaust gas of NOx with low concentration based on rare earth metal complex was proposed in this paper. The absorptivities of NOx by different solvents and complexes between yttrium and substituted salicylate under different conditions were investigated. The results showed that the esters e.g., ethyl acetate and butyl acetate have higher absorptivity than that of ketone, water or alcohol and the better volume ratio of solvents to NOx is 1 to 0.9. When added yttrium perchlorate and methyl salicylate to butyl acetate, the absorptivity increases because of coordinated catalytic absorption. The better molar ratio of yttrium perchlorate to methyl salicylate is 1 to 1 and the better amount ratio of yttrium perchlorate to NOx is over 3 to 1. When the absorption liquid of NOx with butyl acetate added yttrium perchlorate and methyl salicylate extracted by water, methyl salicylate is in organic phase can be used to absorb NOx again and yttrium perchlorate with NOx is in aqueous phase can be used as nitrating agent. The method is economic and effective because not only almost 100 % NOx are removed, but also nitration products are formed. A technological process for the absorption recovery of NOx with low concentration from waste gas is proposed.

Keywords

Waste gases NOx Rare earth
Liu, Y., Zhou, C., Zhang, S., Zou, X., & Li, Y. (2016). A New Method for Treating Waste Gases Containing NOx with Low Concentration Based on Rare Earth Metal Complex. Asian Journal of Chemistry, 28(6), 1307–1310. https://doi.org/10.14233/ajchem.2016.19665
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