COAL ENGINEERING ›› 2018, Vol. 50 ›› Issue (5): 127-130.doi: 10.11799/ce201805035

Previous Articles     Next Articles

Research on ultra-fine coal surface properties before and after treatment with liquid CO2

  

  • Received:2018-01-11 Revised:2018-03-23 Online:2018-05-20 Published:2018-06-14

Abstract: In order to understand the influence of ultra-fine coal surface properties before and after pretreatment with liquid CO2, the experiments of surface modification was performed in a column type agitator. And Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and micro-calorimeter were used to analyze the variation of surface functional groups and wetting heat. The results show that liquid carbon dioxide could change the percentage of hydrophilic and hydrophobic functional groups, with the reaction time, the content of hydrophilic functional groups increased, the wetting heat decreased gradually.

CLC Number: