Influence of pore structure on low temperature oxidation of coal

摘要

Based on fractal characters of coal pore structure, mercury intrusion method was used to study pore structure in coal. Experiment of low temperature oxidation of coal was done, in order to study relationship between low temperature oxidation of coal and pore structure in it. The results showed that total pore volume, specific surface area of coal and fractal dimension value decrease with coal metamorphism degree increase. Temperature increase rate and heat release rate in coal oxidation process decrease with decrease of pore volume in coal, specific surface area and fractal dimension value. Specific surface area plays a key role in coal oxidation when pore volume in coal samples is the same.