Efficient and Reversible Nitric Oxide Absorption by Low-Viscosity, Azole-Derived Deep Eutectic SolventsClick to copy article linkArticle link copied!
- Luhong ZhangLuhong ZhangSchool of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of ChinaMore by Luhong Zhang
- Haopeng MaHaopeng MaSchool of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of ChinaMore by Haopeng Ma
- Guangsen WeiGuangsen WeiSchool of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of ChinaMore by Guangsen Wei
- Bin JiangBin JiangSchool of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of ChinaMore by Bin Jiang
- Yongli SunYongli SunSchool of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of ChinaMore by Yongli Sun
- Xiaowei Tantai*Xiaowei Tantai*E-mail: [email protected]. Tel/Fax: +86 22 27400199.School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of ChinaMore by Xiaowei Tantai
- Zhaohe HuangZhaohe HuangSchool of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of ChinaMore by Zhaohe Huang
- Yang ChenYang ChenSchool of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of ChinaMore by Yang Chen
Abstract

Deep eutectic solvents (DESs) have been extensively studied and applied to the absorption of acid gases. However, the absorption of nitric oxide (NO) by DES has rarely been reported. In this work, we found that NO can be absorbed by azole-derived DESs effectively and reversibly. A series of DESs with low viscosity based on tetrazolium (Tetz), triazole, and imidazole as hydrogen bond donors (HBDs) and common ionic liquids as hydrogen bond acceptors (HBAs) were prepared. The absorption results showed that DESs based on tetrabutylphosphine chloride (P4444Cl) as HBA or Tetz as HBD exhibited higher NO absorption. Notably, Tetz/P4444Cl DES exhibited the NO absorption values of 2.10 and 1.01 mol/mol at 101.3 and 12 kPa partial pressures, respectively, and 303.15 K. In addition, the NO absorption capacity decreased continuously with the increasing temperature. The evaporation of Tetz/P4444Cl DES can be ignored during the absorption progress. The results of thermogravimetric analysis measurement and regeneration experiments demonstrated that Tetz/P4444Cl possessed desirable thermostability and reusability. The absorption mechanism of NO by Tetz/P4444Cl was studied by Fourier transform infrared, 1H NMR, and Gaussian simulations. It was found that there was chemical interaction between NO and the hydrogen-containing nitrogen atom of Tetz.
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