Experimental Study on the Volatilization Dynamic of Long Flame Coal Pyrolysis

Abstract: Long flame coal from the Shenfu-Dongsheng coal field in the Ordos Basin is pyrolyzed for volatilization dynamic experiments using HYLZ-2 cryogenic dry distillation furnace. The pyrolysis procedure is designed to contain the dry dewatering phase (20 to 245 ℃), the transition phase of slight pyrolysis (245 to 460 ℃ or other 485 ℃, and 510 ℃) both at 5 ℃/min constant heating rate, and the strong isothermal pyrolysis phase at those three temperatures to the end point. For the isothermal pyrolysis, the activation energy E =214 KJ/mol, and the pre-exponential factor lnA=28.832. For the constant heating rate pyrolysis, the activation energy E =26.26 KJ/mol, and the pre-exponential factor lnA=2.714.

Keywords: temperature time sampling roadmap; constant heating rate pyrolysis; isothermal pyrolysis; volatilization dynamics.