Journal of Radiation Research and Radiation Proces ›› 2016, Vol. 34 ›› Issue (3): 30304-030304.doi: 10.11889/j.1000-3436.2016.rrj.34.030304

• RADIATION CHEMISTRY • Previous Articles     Next Articles

Influence of the non-thermal effect of microwaves on organic sulfur compounds structure

MA Xiangmei1, ZHANG Mingxu2, MIN Fanfei2, WANG Bin1   

  1. 1 Institute of Chemical Engineering, Anhui University of Science & Technology, Huainan 232001, China;
    2 Institute of Material Science & Engineering, Anhui University of Science & Technology, Huainan 232001, China
  • Received:2015-12-28 Revised:2016-01-29 Online:2016-06-20 Published:2016-04-18
  • Supported by:

    Supported by National Basic Research Program of China under Grant 973 Program (2012CB214901), Natural Research key Fund of Education Department of Anhui province (Research the evolution behavior of organic sulfur in high sulphur coking coal under additional energy), and Program of Talent Introduction in Anhui University of Science & Technology (11110)

Abstract:

In order to explore the mechanism of action and impact degree of removing organic sulfur from coal by microwave irradiation, the proton nuclear magnetic resonance spectroscopy (1HNMR), Fourier transform infrared spectroscopy (FT-IR) and Raman laser confocal spectroscopy (RLCS) techniques were used to investigate the effect of microwave non-thermal on the structural and performance of the model organic sulfur compounds. The FT-IR results showed that the non-thermal effects really existed and could affect the bond energy distribution, vibration strength and stability of the groups, but only on the molecular mechanisms of polarization of organic sulfur compound, not destroyed any original molecule chemical bond or generated new chemical bonds and groups. 1HNMR revealed that the non-thermal effect influenced the electron density distribution and magnetic environment inside the model compound molecular. The dual polarization characteristics of sulfur compounds changed not only the microscopic electron polarization or atomic polarization, but also the orientation of permanent dipole moment. Raman proved that the microwave non-thermal effect could effectively polarize the sulfur-containing chemical bonds, which weakened the vibration intensity, and thus contributed to the remove of organic sulfur from coal.

Key words: Thiols/thioethers, Microwave radiation, Non-thermal effect, Molecular structure

CLC Number: 

  • TL13