煤慢速升温热解过程中冠醚对硫脱除率的影响

he transformation behavior of sulfur in Tuanbo (TB) coal during slow-heating pyrolysis at different temperatures and residence times was investigated in fixed-bed system in inert atmosphere. Furthermore, the influence of 18-crown-6 or dibenzo-18-crown-6 on desulfuration rate during slow-heating pyrolysis of coal was also studied. The results indicated that adding 18-crown-6 or dibenzo-18-crown-6 could improve the total sulfur removal during Tuanbo coal pyrolysis; and when the temperature was higher than 550℃, adding dibenzo-18-6 was more efficiency. Furthermore, The results also showed that adding dibenzo-18-crown-6 also could improve organic sulfur removal obviously; and when the temperature was lower than 750℃, adding 18-crown-6 or dibenzo-18-crown-6 also could improve the pyritic sulfur removal obviously. Moreover, through desorption experiment and pore analysis， one also could know that compared with the char achieved during raw coal pyrolysis, char obtained during pyrolysis when adding 18-crown-6 or dibenzo-18-crown-6 had more powerful desorption capability and larger pore volume and diameter.