褐煤基活性焦的制备及其吸附性能研究  

STUDY ON PREPARATION AND ADSORPTION PERFORMANCE OF ACTIVE COKE FROM LIGNITE

作　　者：高翔[1,2] 张永奇 王志青[1,2] 赵建涛[1,2] 黄戒介[1,2] 房倚天[1,2] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,太原030001 [2]中国科学院大学,北京100049

出　　处：《煤炭转化》2015年第4期79-83,共5页Coal Conversion

基　　金：国家自然科学基金青年科学基金资助项目(21106173);中国科学院战略性先导科技专项项目(XDA0705100);山西省青年科技研究基金资助项目(2013021007-2);山西煤化所前瞻项目(Y1SC5A1111)

摘　　要：利用固定床快速热解装置制得锡林浩特褐煤半焦,以水蒸气为活性剂,在不同条件下对半焦活化制得活性焦.对活性焦的苯酚吸附性能进行了测试,同时将活性焦的碘值和亚甲基蓝吸附值与苯酚的吸附量进行了线性拟合,拟合发现碘值可以更好地反映活性焦对苯酚的吸附能力.实验还考察了活化过程中活化温度、活化时间和水蒸气流量对制得活性焦吸附性能的影响.研究表明,活化温度、活化时间和水蒸气流量对活性焦的吸附性能都有重要影响;相比活化温度和活化时间,水蒸气流量可以同等程度地改变活性焦微孔和中孔数量;活化时间80min,水蒸气流量8g/h,活化温度800℃条件下制得的活性焦对苯酚的吸附性能最大,其吸附量为13.8mg/g.The phenol adsorption of active coke from lignite was investigated. The cokes from the pyrolysis of lignite under different preparation conditions were activated with the agency of steam in a quartz fixed bed. The phenol adsorption experiments were conducted with cokes from different preparation conditions and after that the iodine value as well as the methylene blue adsorbance was achieved according to the national standards. The results indicated that proper preparation conditions were reasonable for active coke phenol adsorption. The steam flow could enhance the number of micropores and mesopores equally while the other two factors tend to singly change the number of micropores and mesopores. The best condition for the preparation of activated coke was found at temperature of 800 ℃, activation time of 80 min and steam flow of 8 g/h. In that case, the phenol adsorbance could reach 13.8 mg/g.

关 键 词：水蒸气活化 活性焦 苯酚 碘值 亚甲基蓝吸附值 

分 类 号：TQ424.1[化学工程]