摘要
采用溶剂热法合成了金属有机骨架(MOF)材料MIL-101、UiO-66和HKUST-1,运用多种技术手段进行了表征,考察了3种MOF材料对苯乙烯的吸附性能。表征结果显示:3种MOF材料均具有较好的分散性、晶体颗粒均匀;MIL-101、HKUST-1和UiO-66的比表面积分别为2510,1147,742 m^(2)/g。实验结果表明:在MOF材料用量3.0 g、温度25℃、压力101 kPa的条件下,MIL-101、UiO-66和HKUST-1对苯乙烯的平衡吸附量分别为795,197,126 mg/g;MIL-101对苯乙烯的吸附过程符合准二级动力学模型;MIL-101吸附苯乙烯的过程分为表面吸附、颗粒内扩散和微孔吸附3个阶段,3个阶段对苯乙烯吸附量的贡献率分别为32.5%、61.8%和5.7%;3次连续吸附-脱附实验后,MIL-101对苯乙烯的吸附量基本保持不变,脱附率为98%,远高于木质活性炭(68%),表现出良好的吸附性能和可再生性。
The metal organic framework(MOF)materials MIL-101,UiO-66 and HKUST-1 were synthesized by the solvent thermal method and characterized by various techniques.The adsorption properties of the 3 MOF materials to styrene were investigated.The characterization results show that:All the 3 MOF materials have good dispersibility and uniform crystal particles;The specific surface area of MIL-101,HKUST-1 and UiO-66 is 2510,1147,742 m^(2)/g,respectively.The experimental results show that:Under the conditions of MOF amount 3.0 g,temperature 25℃and pressure 101 kPa,the equilibrium adsorption amounts of styrene on MIL-101,UiO-66 and HKUST-1 is 795,197 and 126 mg/g,respectively;The adsorption process of styrene on MIL-101 is in accordance with the pseudo-second order kinetic model;Surface adsorption,intra particle diffusion,and microporous adsorption are the 3 stages in the adsorption process of styrene on MIL-101,with 32.5%,61.8%,and 5.7%of the contribution rate to styrene adsorption amount,respectively;After three successive adsorption-desorption cycles,the adsorption amount of styrene on MIL-101 remaines unchanged,and the desorption ratio is 98%,which is much higher than that on active carbon(68%),indicating the good adsorption and regeneration performance.
作者
葛维翰
黄龙
张晨
GE Weihan;HUANG Long;ZHANG Chen(College of New Materials and Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China)
出处
《化工环保》
CAS
CSCD
北大核心
2023年第5期638-643,共6页
Environmental Protection of Chemical Industry
基金
北京石油化工学院学科建设项目(BIPTACF-003)
北京市属高等学校优秀青年人才培育计划项目(BPHR202203094)。
