A test study on effectiveness of desulfurization through coal pyrolysis of Heshan raw coal has been carried out by using a fixed bed reator system under inert atmosphere

investigating mainly the influence of pyrolysis temperature and pyrolysis time upon the variation of volatile matter and sulfer content in coal.It has been discovered from the study that:the loss of volatile matter is increasing along with the rise of pyrolysis temperature

however

the sulfer content in carbocoal is increasing at first

and then decreasing

and has a tendency to increase again;along with the pyrolysis time being lengthened

the loss of volatile matter has increased

but the sulfer content in carbocoal being increased at first

and then being decreased

and has a tendency of stabilization in variation.Only enhancing the pyrolysis temperature or lengthening the pyrolysis time is unfavourable to improve the effectiveness of desulfurization.