文献类型：期刊文献

英文题名：Enhancement of NOx adsorption performance on zeolite via a facile modification strategy

作者：Liu, Yingshu[1];Wu, Xiaoyong[1];Yang, Xiong[1];Tao, Haiyang[1];Li, Jinjuan[2];Zhang, Chuanzhao[3];Yang, Ralph T.[4];Li, Ziyi[1]

第一作者：Liu, Yingshu

通讯作者：Yang, X[1];Li, ZY[1]

机构：[1]Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China;[2]Guizhou Univ, Minist Educ, Coll Resources & Environm Engn, Key Lab Karst Georesources & Environm, Guiyang 550025, Peoples R China;[3]Beijing Union Univ, Coll Biochem Engn, Beijing 100023, Peoples R China;[4]Univ Michigan, Dept Chem Engn, Ann Arbor, MI 48109 USA

第一机构：Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China

通讯机构：[1]corresponding author), Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China.

年份：2023

卷号：443

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20224413052511);Scopus(收录号：2-s2.0-85140981307);WOS:【SCI-EXPANDED(收录号:WOS:000885456100006)】；

基金：Acknowledgment The authors would like to express the gratitude to the Science and Technology Planning Project of Guizhou Province (No. QKHCZ [2021] 497) , the Fundamental Research Funds for the Central Universities (No. FRF-IDRY-GD21-02) , and the Scientific Research Project of Beijing Educational Committee (No. KM202011417007) .

语种：英文

外文关键词：Nitrogen oxides; Adsorption; Desorption; Zeolite; Incipient-wetness impregnation

摘要：Adsorption is a promising technology for simultaneously capturing nitrogen oxides (NOx) from flue gases and recycling NO2 as a profitable chemical, for which a robust and efficient adsorbent provides the key step for success in practical applications. This work reports the enhancement of NOx adsorption performances with less cost of desorption energy on Cu-ZSM-5 zeolites prepared by a facile and rapid (690 s) modification method, the incipient-wetness impregnation coupled with microwave drying (IM). In comparisons to H-ZSM-5, Na-ZSM-5 and conventionally liquid-phase ion-exchanged counterparts under sub-1000 ppm NOx feed concentrations and room temperature, the IM sample renders a record NOx adsorption capacity (qt,NOx) of 0.878 mmol/g from dry gas stream on zeolites, and an applicable qt,NOx of 0.1 mmol/g from wet gas stream with a proper copper loading (2.1 wt%). The temperature programmed desorption of NOx on the optimal IM sample saturated with NOx from wet gas stream exhibit primary peak temperature lower than reported Cu-ZSM-5 and significant NO2 proportion (72.6 %) in desorbed NOx. Deeper insights into advantageous NOx oxidative adsorption over the properly-loaded Cu-ZSM-5 in terms of diverse adsorbate states and competitiveness towards H2O were gained, showing IM method a promising sorbent improvement strategy for practical use.