Abstract：Effects of adsorbent type, operating conditions of discharge, and cyclic operation on the removal of NOx in adsorption-discharge plasma decomposition process were investigated. Among the four kinds of zeolites (ZSM-5, MOR, SAPO-34 and SSZ-13) investigated, SSZ-13 showed the highest NOx adsorption capacity and lowest adsorption strength, which were beneficial to prolong the adsorption period and promote the desorption and decomposition of NOxby plasma. The results of temperature-programmed desorption and infrared spectroscopy showed that NOx was mainly physically or weakly chemically adsorbed on the surface of SSZ-13, while a small amount of NOx was converted into strongly adsorbed species such as NO3− and NO2−.The removal of NOxadsorbed on SSZ-13 by plasma is significantly affected by the operating conditions of discharge. Compared with N2-purge discharge and sealed-discharge, higher NOx removal efficiency and energy efficiency, less residual NOx on the adsorbent, and lower N2O selectivity can be obtained simultaneously by using sealed-discharge first and thenN2-purge discharge. The removal performance of NOxcan be maintained during cyclic operation of the adsorption-plasma decomposition process, without significant changes to the crystal and pore structures of SSZ-13 after six cycles.
杜孟威, 樊星, 陈莉, 李佳, 宋丽云, 李坚. 吸附-放电等离子体分解去除NOx研究[J]. 中国环境科学, 2022, 42(6): 2541-2551.
DU Meng-wei, FAN Xing, CHEN Li, LI Jia, SONG Li-yun, LI Jian. Removal of nitrogen oxides by adsorption-discharge plasma decompositionprocess. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(6): 2541-2551.
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