Adsorption of nitrogen oxides by the moisture-saturated zeolites in gas stream.
Adsorption of nitrogen oxides by the moisture-saturated zeolites in gas stream.
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DOI：
10.1016/j.jhazmat.2008.05.111
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发表时间：
2009-03
影响因子：
13.6
通讯作者：
Jing Yang;T. Zhuang;F. Wei;Yu Zhou;Yi Cao;Z. Wu;J. Zhu;Chuan Liu
中科院分区：
文献类型：
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作者：
Jing Yang;T. Zhuang;F. Wei;Yu Zhou;Yi Cao;Z. Wu;J. Zhu;Chuan Liu
研究了室温下湿饱和沸石对NOx的瞬时吸附。在所研究的沸石中，八面沸石由于其相对大的孔径而表现出最高的吸附容量。此外，通过比较具有不同阳离子密度（NaX与NaY，介孔硅MCM-48-like与八面沸石）和处理（NaY与Cu 2+的离子交换）的沸石的吸附，证明阳离子的影响。对于NO的吸附，气体流量和预吸附的烃，如苯，乙醛或1，3-丁二烯的影响进行了评估。实验结果表明，沸石分子筛可以有效地捕集烟气中的氮氧化物，即使烟气已经被水分饱和，这将对环境保护和公众健康具有重要意义。
This investigation examined the instantaneous adsorption of NOxby moisture-saturated zeolites at ambient temperature. Among the zeolites studied, Faujasite exhibited the highest adsorption capacity owing to its relatively large pore size. Besides, the influence of cation was demonstrated by comparing the adsorption of zeolites with different cation densities (NaX vs. NaY, mesoporous silica MCM-48-like vs. Faujasite) and treatments (ion exchange of NaY with Cu2+). For the adsorption of NO, the effects of gas flow rates and pre-adsorbed hydrocarbons such as benzene, acetaldehyde or 1,3-butadiene were evaluated. It was proven that zeolite could efficiently capture nitrogen oxides in gas stream even it had been saturated by moisture, which will be valuable for the protection of environment and public health.