煤矸石制备超微分子筛及其离子交换吸附性能的研究  

Study on ultramicro molecular sieve preparation by coal gangue and its ion exchange adsorption performance

作　　者：杨建利[1] 杜美利[1] 杨小刚 李刚[1] 于春侠[1] 朱晨浩 朱超 Yang Jianli;Du Meili;Yang Xiaogang;Li Gang;Yu Chunxia;Zhu Chenhao;Zhu Chao(College of Chemistry and Chemical Engineering,Xi'an University of Science and Technology,Xi'an,Shaanxi 710054,China)

机构地区：[1]西安科技大学化学与化工学院

出　　处：《中国煤炭》2019年第12期71-75,共5页China Coal

基　　金：国家自然科学基金项目(41672154);陕西省教育厅项目(6210116036);西安科技大学博士启动基金项目(2018QDJ04023)

摘　　要：采用煤矸石为原料利用两步溶出法得到试验用硅铝,加入一定量的导向剂和柠檬酸在碱性条件下反应制备分子筛。由XRD、扫描电镜和吸附试验确定最佳试验合成条件,即加入3%的导向剂、柠檬酸∶氧化铝为1的柠檬酸、晶化时间为60 min时,合成的分子筛吸附曲线符合Langmuir模型,动力学吸附速率满足二阶吸附速率方程。利用煤矸石制备超微分子筛一方面解决了煤矸石的污染问题,另一方面增加了煤矸石的附加价值,达到变废为宝的效果,实现了环保低碳的要求。Using coal gangue as raw material,two-step dissolution method was used to obtain the experimental silicon aluminum,and a certain amount of guiding agent and citric acid were added to prepare molecular sieves under alkaline conditions.The optimum synthesis conditions were determined by XRD,SEM and adsorption test.When 3%guiding agent,citric acid with same dosage with aluminum oxide were added and crystallization time was 60 min,the adsorption curve of the synthesized molecular sieve was in accordance with Langmuir model,and the kinetic adsorption rate met the second order adsorption rate equation.The preparation of ultra-fine molecular sieve from coal gangue not only solved the pollution problem of coal gangue,but also increased the additional value of coal gangue,achieved the effect of turning waste into treasure,and met the requirement of environmental protection and low carbon.

关 键 词：煤矸石 超微分子筛 导向剂 柠檬酸 吸附 

分 类 号：TQ536.91[化学工程—煤化学工程]