煤慢速升温热解过程中冠醚对硫脱除率的影响  

Impact of Crown Ether on the Sulfur Removal Rate During the Course of Slow-heating Pyrolysis of Coal

作　　者：王宝凤[1] 亢强[1,2] 朱永满[1] 李丽荣[1] 黄亚茹[1] 张进军[1] 

机构地区：[1]山西师范大学,山西临汾041004 [2]临汾职业技术学院,山西临汾041004

出　　处：《煤化工》2013年第5期25-28,40,共5页Coal Chemical Industry

基　　金：教育部高等学校博士学科点专项基金(20091404120002);山西省青年科技基金(2011021008-1)

摘　　要：在固定床反应器中研究了团柏煤中硫在氮气气氛下随温度、停留时间的变迁规律,并考察了煤慢速升温热解过程中添加18-冠-6或二苯并-18-冠-6对硫脱除率的影响。结果表明:在煤热解过程中添加18-冠-6或二苯并-18-冠-6都有利于总硫的脱除;当热解温度大于550℃时,相同条件下添加二苯并-18-冠-6时总硫的脱除效果明显优于添加18-冠-6;在煤热解过程中,添加二苯并-18-冠-6也可提高有机硫的脱除率;当热解温度小于650℃时,添加18-冠-6或二苯并-18-冠-6,同时可明显提高黄铁矿硫的脱除率。通过对热解半焦进步的脱附实验和孔结构分析,发现在原煤热解过程中,添加18-冠-6或二苯并-18-冠-6,可以使半焦平均孔径变大。The transformation behavior of sulfur in Tuanbo （TB） coal during the course of slow-heating pyrolysis at dif- ferent temperatures and residence times was investigated in the fixed-bed system in inert atmosphere. Besides, the impact of 18-crown-6 or dibenzo-18-crown-6 on the desulfuration rate during the course of 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 rate during Tuanbo coal pyrolysis; and when the temperature was higher than 550 ~C, adding dibenzo-18-6 was more efficient. Furthermore, The results also showed that adding dibenzo-18-crown-6 could also obviously improve organic sulfur removal; and when the temperature was lower than 650 ~C, adding 18-crown-6 or dibenzo-18-crown-6 could also improve pyritic sulfur removal. Moreover, through desorption experiment and pore analysis,one could also find out that when adding 18- crown-6 or dibenzo-18-crown-6 during the course of coal pyrolysis, the average diameter of the char became larger.

关 键 词：煤 热解 冠醚 硫脱除率 

分 类 号：TQ530.2[化学工程—煤化学工程]