化工学报 ›› 2020, Vol. 71 ›› Issue (11): 5043-5051.DOI: 10.11949/0438-1157.20200796

• 南京大学化工学院院庆专栏 • 上一篇    下一篇

新型酚基深共熔溶剂的物性表征及NH3捕集性能研究

程宁宁1(),曾丽花1,邓毓麟1,彭海龙1,2,黄宽1,2()   

  1. 1.南昌大学资源环境与化工学院,江西 南昌 330031
    2.南昌大学鄱阳湖环境资源与利用教育部重点实验室,江西 南昌 330031
  • 收稿日期:2020-06-22 修回日期:2020-09-02 出版日期:2020-11-05 发布日期:2020-11-05
  • 通讯作者: 黄宽
  • 作者简介:程宁宁(1997—),女,硕士研究生,1318229157@qq.com
  • 基金资助:
    国家自然科学基金项目(22008033);江西省自然科学基金项目(20192ACB21016)

Physical properties characterizations and NH3 capture performance investigation of novel phenol-based deep eutectic solvents

Ningning CHENG1(),Lihua ZENG1,Yulin DENG1,Hailong PENG1,2,Kuan HUANG1,2()   

  1. 1.School of Resources, Environmental and Chemical Engineering, Nanchang University, Nanchang 330031, Jiangxi, China
    2.Key Laboratory of Poyang Lake Environment and Resource Utilization of Ministry of Education, Nanchang 330031, Jiangxi, China
  • Received:2020-06-22 Revised:2020-09-02 Online:2020-11-05 Published:2020-11-05
  • Contact: Kuan HUANG

摘要:

NH3污染问题一直是化工、环保等领域关注的重点问题,对工业尾气中的NH3进行捕集和回收具有十分重要的意义。以氯化1-乙基-3-甲基咪唑 ([Emim]Cl) 为氢键受体,苯酚、间苯二酚和间苯三酚为氢键供体,构建了一类新型酚基深共熔溶剂。详细测定了酚基深共熔溶剂在不同温度下的密度和黏度,并采用经验方程对密度和黏度数据进行了关联。此外,系统考察了酚基深共熔溶剂对NH3的吸收-解吸性能和吸收选择性,发现其具有较高的NH3吸收容量,被吸收的NH3可在加热和减压的条件下释放出来,经过多次循环NH3吸收容量基本保持不变。而酚基深共熔溶剂的CO2吸收容量则较低,因而具有优异的NH3/CO2吸收选择性。最后,借助光谱表征和量子化学计算,深入探究了NH3在酚基深共熔溶剂中吸收的相互作用机制。

关键词: 溶剂, 氨气, 吸收, 溶解性, 热力学

Abstract:

NH3 pollution has always been a key concern in chemical industry, environmental protection and other fields. The capture and recovery of NH3 in industrial exhaust gas is of great significance. A novel class of phenol-based deep eutectic solvents (DESs) were constructed by using 1-ethyl-3-methylimidazolium chloride ([Emim]Cl) as the hydrogen bond acceptor, while phenol (Phe), resorcinol (Res) and phloroglucinol (Phl) as the hydrogen bond donors. The densities and viscosities of phenol-based DESs at different temperatures were determined in detail, and the density and viscosity data were correlated by empirical equations. In addition, the NH3 absorption-desorption performance and absorption selectivity of phenol-based DESs were systematically investigated. It is found that the capacities of phenol-based DESs for NH3 absorption are quite high, and the absorbed NH3 can be released by heating and evacuating, with the capacities for NH3 absorption remaining almost unchanged after several cycles. However, the capacities of phenol-based DESs for CO2 absorption are quite low, indicating the excellent performance of phenol-based DESs for NH3/CO2 selective absorption. Finally, the interaction mechanism of NH3 absorption in phenol-based DESs was studied in depth with the help of spectral characterizations and quantum chemistry calculations.

Key words: solvents, ammonia, absorption, solubility, thermodynamics

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