新疆典型煤种制成型颗粒活性炭及工艺优化研究  

Formed granular activated carbon prepared by typical Xinjiang coal and the process optimization

作　　者：李秀春 LI Xiuchun(China Coal Huali Energy Holding Co.,Ltd.,Beijing 100013,China)

机构地区：[1]中煤华利能源控股有限公司,北京100013

出　　处：《煤炭工程》2023年第6期176-182,共7页Coal Engineering

摘　　要：选用哈密弱黏煤、准东不黏煤作为原料,采用低速炭化和物理活化工艺制备成型颗粒活性炭,调节煤粉粒度、炭活化参数进行工艺优化。检测了活性炭的碘值、亚甲蓝值、强度等,并通过低温氮吸附法,获取其表面积和孔结构参数。结果表明:哈密煤可制得碘值1135 mg/g、强度92.9%压块活性炭,煤粉粒度对强度影响较大;炭化终温650℃、在950℃下活化140 min是理想工艺条件;准东煤难以制成压块活性炭;两种原料煤均可制成柱状活性炭,煤粉细度对所制柱状活性炭强度影响不大,煤焦油是形成柱状活性炭强度的关键;煤焦油中沥青在炭化过程中易形成取向度高、更为规则结构,不利于后续的活化造孔;在炭化终温650℃条件下,弱黏煤制备活性炭理想活化时间为160 min,不黏煤需要延长至180 min,所制活性炭的碘值分别为945 mg/g和912 mg/g;煤中惰质组的反应活性较弱,惰质组含量较多的准东煤需要较长的活化时间才能发育出较为发达的孔隙。Hami weakly caking coal and Zhundong non-caking coal are selected as raw materials,and the low-speed carbonization and physical activation process are used to prepare granular activated carbon and the coal particle size and carbonization activation parameters are adjusted.The iodine value,methylene value and hardness of activated carbon are tested,and the surface area and pore structure parameters are obtained through the adsorption/desorption of liquid nitrogen.Hami coal is used to produce briquetted activated carbon with iodine value of 1135mg/g and hardness of 92.9%,and the coal powder size greatly influences the hardness of activated carbon.The final temperature of carbonization is 650℃,and 140 min activation at 950℃is the ideal process condition.It's difficult to make briquetted activated carbon with Zhundong coal,while both kinds of raw coal can be prepared into granular activated carbon.The coal powder size has little effect on the hardness of the granular activated carbon made,and coal tar is the key to the formation of extruded activated carbon hardness.Asphalt in coal tar is more likely to form a highly oriented and more regular structure during the carbonization,which is not conducive to the subsequent activation of pore formation.Under the final temperature of 650℃,the ideal activation time of the activated carbon prepared by the weakly caking coal is 160 min,and the non-caking coal needs to be extended to 180 min.The iodine value of the produced activated carbon were 945 and 912 mg/g,respectively.Under the final temperature of carbonization of 650℃,the ideal activation time of activated carbon prepared by non-caking coal is 160 min,and Zhundong coal needs to be extended to 180 min.The iodine value of the produced activated carbon were 945 and 912mg/g,respectively.The reactivity of the inertinite in the coal is weak,and the Zhundong coal with more abundant inertinite needs a long activation time to develop the pores.

关 键 词：新疆煤 压块活性炭 柱状活性炭 工艺优化 

分 类 号：TQ127.11[化学工程—无机化工]