Li Wang, Zhangmiao Ye, Caihong Lin, Yugao Wang*, Jinping Li and Jiangfeng Yang*,
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引用次数: 0
摘要
由于 CO2 和 N2O 的物理特性非常相似，因此己二酸尾气中的 N2O/CO2 分离是一项重大挑战。本文全面研究了不同阳离子（Na+ 和 Ag+）的 FAU 型沸石 Y 对 CO2 和 N2O 的吸附和分离性能。Ag+ 交换后，沸石 Y 从 CO2 选择性吸附剂变为 N2O 选择性吸附剂。AgY 对 N2O 的吸附量很高（95.7 cm3/g），但吸附热相对较低（23.1 kJ/mol），因此适用于 N2O/CO2 分离。原位傅立叶变换红外光谱法表明，N2O 成功地吸附在 AgY 上。突破实验表明，在流量为 20 mL/min 的条件下，AgY 在分离 N2O/CO2 方面表现出优异的性能，同时还表现出良好的保留时间和保留时间与 CO2 突破时间的比值，分别高达 4.1 min 和 0.24，这使其成为迄今为止所报道的最佳 N2O/CO2 分离材料。
The Research into N2O–CO2 Separation on Na/Ag–Y Zeolite
N2O/CO2 separation in the tail gas of adipic acid presents a significant challenge due to the closely resembling physical characteristics exhibited by CO2 and N2O. Herein, adsorption and separation performances of CO2 and N2O on FAU-type zeolite Y with different cations (Na+ and Ag+) were studied comprehensively. After Ag+ exchange, zeolite Y changes from a CO2-selective adsorbent to a N2O-selective adsorbent. AgY shows high N2O uptake (95.7 cm3/g) but relatively low adsorption heat (23.1 kJ/mol), making it suitable for N2O/CO2 separation. In situ Fourier transform infrared spectrometry indicates that N2O is successfully adsorbed on AgY. The breakthrough experiment reveals that AgY exhibits superior performance in the separation of N2O/CO2 at a flow rate of 20 mL/min while also exhibiting a favorable retention time and ratio of retention time with CO2 breakthrough time, which can reach up to 4.1 min and 0.24, respectively, which makes it an optimum N2O/CO2 separation material reported so far.
期刊介绍：
ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.
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