DOI: 10.11799/ce201708007
Study on pyrolysis characteristics of large size bituminous coal from Dacheng
WANG Yu
JING Tian
ZHAO Xue
LI Yu-long
WANG Zhe
Abstract：Coal underground gasification technology can realize coal seam in-situ gasification,the large size lump coal participates the reaction comes from the thermal crushing process of the coal seam.In order to study the pyrolysis characteristics of large size lump coal,pyrolysis experiment was carried out with 5cm,8cm and 10cm lump coal in the atmosphere of CO 2 and N 2.The results show that the activation energy of pyrolysis is about 120kJ/mol when the temperature is based on the external temperature,and it is about 50kJ/mol on the internal temperature;with the increase of coal size,the effective gas components increase;the pyrolysis efficiency increases with pyrolysis reaction residence time;the CH 4 emission starts to increase at 300℃,and reaches the peak at 700℃ in N 2 atmosphere,while it will continue to increase in CO 2 atmosphere.The H 2 emission is above 500℃ and reaches the maximum value at 750℃ and 700℃,during the pyrolysis in N 2 and CO 2 atmosphere of with a rising temperature.
Keywords：underground coal gasificationbituminous coallarge particle sizepyrolysisdynamics
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 24-28 )