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]; Li, Ziyi[1]; Tao, Haiyang[1]; Yang, Xiong[1]; Li, Jinjuan[2]; Zhang, Chuanzhao[3]; Yang, Ralph T.[4]

第一作者：Liu, Yingshu

机构：[1] School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China; [2] College of Resources and Environmental Engineering, Key Laboratory of Karst Georesources and Environment [Ministry of Education], Guizhou University, Guiyang, 550025, China; [3] College of Biochemical Engineering, Beijing Union University, Beijing, 100023, China; [4] Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, 48109-2136, United States

第一机构：School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220176206)

语种：英文

外文关键词：Copper compounds - Gas adsorption - Gases - Impregnation - Ion exchange - Nitrogen oxides - Recycling - Temperature programmed desorption

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 modified by incipient-wetness impregnation coupled with microwave drying (Cu-ZSM-5_IM), in comparisons to H-ZSM-5, Na-ZSM-5 and conventionally liquid-phase ion-exchanged Cu-ZSM-5. The Cu-ZSM-5_IM renders record NOx adsorption capacity (qt,NOx) of 0.878mmol/g on zeolites from dry gas stream at sub-1000 ppm feed concentrations and room temperatures, and applicable qt,NOx of 0.1mmol/g from wet gas stream (42%RH at 298 K) with a moderate loading mass of copper (2.1%wt corresponding to ion exchange rate of 55%). The temperature programmed desorption of NOx on the optimal Cu-ZSM-5_IM saturated with NOx from wet gas stream exhibit primary peak temperature (~600 K) lower than reported Cu-ZSM-5 (~698 K) and NO2 as main component (72.6%) in desorbed NOx, which are beneficial for recycling in practice. Deeper insights into advantageous oxidative adsorption of NOx from CO2/N2/O2/H2O gas mixture on Cu-ZSM-5_IM with the rapid (≤700 s) and facile modification are discussed based on in-situ FTIR characterizations. ? 2022, The Authors. All rights reserved.