钛锂铝水滑石/延迟焦的制备及其CO_2吸附性能研究  

Preparation and CO_2 adsorption performance of Ti/Li/Al-LDHs/delayed cock

作　　者：孔婷婷[1] 张颖萍[1] 张亚刚[1] 董羿蘩 周安宁[1] 

机构地区：[1]西安科技大学化学与化工学院,陕西西安710054

出　　处：《中南大学学报（自然科学版）》2017年第4期880-888,共9页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51074122)~~

摘　　要：采用共沉淀法,以延迟焦(DC)为载体制备钛锂铝水滑石/延迟焦复合材料吸附剂(Ti_1Li_3Al_4/xDC,其中,x为钛锂铝水滑石与延迟焦的质量比),探讨该吸附剂的CO_2吸附性能。通过X线衍射(XRD)、扫描电镜(SEM)、热重分析(TG-DSC)、傅里叶变换红外光谱(FTIR)等分析方法对复合材料结构、形貌、热稳定性、表面官能团等进行表征;考察x和焙烧温度等因素对复合材料CO2吸附性能的影响。研究结果表明:当x=3,焙烧温度为600℃时,复合材料Ti_1Li_3Al_4/3DC的CO_2吸附量最高,为58.2 mg/g,且10次循环后的吸附稳定性良好。The laminated composite, i.e. Ti1Li3Al4 layered double hydroxides/delayed coke（DC） composite adsorbent （Ti1Li3Al4/xDC, x is the ratio of Ti1Li3Al4-LDHs and DC） was prepared by co-precipitation method and their CO2 adsorption capacity was discussed. The layered structure, micromorphology, thermal stabilities and surface function group were characterized using X-ray diffractometer （XRD）, scanning electron microscopy（SEM）, thermogravimetric-differential scanning calorimeter（TG-DSC） and Fourier transform infrared（FTIR）.The effects of the proportion of DC and Ti1Li3Al4-LDHs and calcination temperature on the CO2 adsorption properties were studied. The results show that when x=3 and calcined at 600 ℃, the Ti1Li3Al4/3DC exhibits the highest CO2 adsorption capacity （58.2 mg/g）. In addition, its adsorption stability is also good after 10 cycles.

关 键 词：延迟焦 钛锂铝水滑石 CO2 吸附剂 复合材料 

分 类 号：TQ424.1[化学工程]