Experimental research on elemental migration rule and in-situ FTIR during sub-bituminous coal low-temperature oxidation
WANG Yongyu
WU Jianming
WANG Junfeng
ZHANG Yulong
TANG Yibo
SONG Shen
Abstract：Based on Kinetics and thermodynamics theory,the migration rules of five basic elements including C,H,O,N and S were studied,and the variation trend of main functional groups was also analyzed during the coal heating process.The results show that variation of carbon oxide compounds played a leading role in the physical and chemical adsorption phase,while the variation frequency of hydrocarbons and nitrogen compounds exceeded carbon oxide compounds.The apparent activation energy value of H element was the smallest and the energy value of O and S element were negative.The migration process of C,H and N was an endothermic process respectively and that of O and S was an exothermic process.Aliphatic C-H in the coal was gradually decreased when coal was heated.The contents of COOH and C =O had same variation trend,and it was obviously that the contents of both groups increased gradually over 120 ℃.Besides,the chemical reaction steps involved in coal low-temperature oxidation were also studied.
Keywords：sub-bituminous coalelement migrationapparent activation energyfunctional groupsreaction steps
Publication Date：2017-01-01
Pages：6( 2031-2036 )