绿色助溶剂三乙二醇在乙炔电化学氧化过程中的作用机制（英文）
发布时间：2018-11-07 12:09
【摘要】：建立在常温、常压条件下准确定量测定溶解乙炔含量的紫外-可见分光光度法,并对乙炔在丙酮、三乙二醇、N,N-二甲基甲酰胺和二甲基亚砜中的溶解特性进行系统考察;采用循环伏安法研究助溶剂丙酮、三乙二醇、N,N-二甲基甲酰胺和二甲基亚砜对乙炔电化学氧化过程的影响以及绿色溶剂TEG对该过程影响的作用机制。实验结果表明在常温、常压条件下,溶解乙炔的含量可采用紫外-可见分光光度法通过紫红色的乙炔铜进行准确测定,N,N-二甲基甲酰胺溶解乙炔的能力最强;在乙炔电化学氧化过程中,水分子和三乙二醇之间强烈的氢键作用是提高乙炔在Na_2SO_4溶液中溶解度的决定性因素;在含体积分数为9%TEG的0.5mol·L~(-1) Na_2SO_4溶液中,乙炔电化学氧化过程的表观活化能为13.20kJ·mol~(-1),属于受吸附控制的不可逆过程。该研究以期寻找一种乙炔的良好溶剂,为乙炔电化学氧化过程的研究、乙炔传感器(尤其是乙炔的电化学传感器)、绿色化学以及乙炔化工等的发展提供理论依据和实验指导。
[Abstract]:A UV-Vis spectrophotometry was established to determine the content of dissolved acetylene at room temperature and atmospheric pressure, and the dissolution characteristics of acetylene in acetone, triethylene glycol, N-dimethylformamide and dimethyl sulfoxide were systematically investigated. The effects of acetone, triethylene glycol, N-dimethylformamide and dimethyl sulfoxide on the electrochemical oxidation of acetylene were investigated by cyclic voltammetry and the mechanism of the effect of green solvent TEG on the process was studied. The experimental results show that the content of dissolved acetylene can be accurately determined by UV-Vis spectrophotometry at room temperature and atmospheric pressure, and the ability of dissolution of acetylene is strongest by NN- dimethylformamide. In the process of electrochemical oxidation of acetylene, the strong hydrogen bond between water molecule and triethylene glycol is the decisive factor to improve the solubility of acetylene in Na_2SO_4 solution. In 0.5mol L ~ (-1) Na_2SO_4 solution containing volume fraction of 9%TEG, the apparent activation energy of the electrochemical oxidation of acetylene is 13.20kJ mol~ (-1), which is an irreversible process controlled by adsorption. The purpose of this study is to find a good solvent for acetylene and to provide theoretical basis and experimental guidance for the study of acetylene electrochemical oxidation process, the development of acetylene sensor (especially acetylene electrochemical sensor), green chemistry and acetylene chemical industry.
【作者单位】： 太原理工大学化学化工学院;太原师范学院化学系;
【基金】：the National Natural Science Foundation of China and the Shenhua Group Corporation Limited(U1261103) the Open Fund of State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences(J12-13-913)
【分类号】：O623.124;O657.3
本文编号：2316326
[Abstract]:A UV-Vis spectrophotometry was established to determine the content of dissolved acetylene at room temperature and atmospheric pressure, and the dissolution characteristics of acetylene in acetone, triethylene glycol, N-dimethylformamide and dimethyl sulfoxide were systematically investigated. The effects of acetone, triethylene glycol, N-dimethylformamide and dimethyl sulfoxide on the electrochemical oxidation of acetylene were investigated by cyclic voltammetry and the mechanism of the effect of green solvent TEG on the process was studied. The experimental results show that the content of dissolved acetylene can be accurately determined by UV-Vis spectrophotometry at room temperature and atmospheric pressure, and the ability of dissolution of acetylene is strongest by NN- dimethylformamide. In the process of electrochemical oxidation of acetylene, the strong hydrogen bond between water molecule and triethylene glycol is the decisive factor to improve the solubility of acetylene in Na_2SO_4 solution. In 0.5mol L ~ (-1) Na_2SO_4 solution containing volume fraction of 9%TEG, the apparent activation energy of the electrochemical oxidation of acetylene is 13.20kJ mol~ (-1), which is an irreversible process controlled by adsorption. The purpose of this study is to find a good solvent for acetylene and to provide theoretical basis and experimental guidance for the study of acetylene electrochemical oxidation process, the development of acetylene sensor (especially acetylene electrochemical sensor), green chemistry and acetylene chemical industry.
【作者单位】： 太原理工大学化学化工学院;太原师范学院化学系;
【基金】：the National Natural Science Foundation of China and the Shenhua Group Corporation Limited(U1261103) the Open Fund of State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences(J12-13-913)
【分类号】：O623.124;O657.3
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，本文编号：2316326
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