摘要
采用溶剂热法,以均苯三甲酸(H_3BTC)为有机配体与硝酸铜进行反应合成了Cu_2(BTC)_3。通过XRD和SEM等方法对Cu_2(BTC)_3进行了表征。实验结果表明,Cu_2(BTC)_3是一种典型的金属有机骨架(MOFs)材料,呈现规整的八面体晶状结构,晶粒大小为2～20μm。相同条件下Cu_2(BTC)_3对CO_2的吸附量高于活性炭和活性碳纤维,且随着吸附压力的升高吸附量明显增大,随着吸附温度的降低吸附量也增大。在0.4 MPa、25℃的条件下,用Cu_2(BTC)_3作吸附剂可以很好地分离CO_2体积分数为5%和20%的CO_2-甲烷混合气体,且对CO_2含量低的混合气体分离效果更好。
Cu2（BTC）3 was prepared from organic ligand benzenetricarboxylate（H3BTC） and Cu（NO3）2 by solvothermal method. The characterization results by XRD and SEM show that Cuz（BTC）3 is a kind of typical metal-organic frameworks（MOFs） material with a regular octahedral crystal structure and 2-20 μm of crystal grain size. Under the same condition, the adsorption capacity of Cu2（BTC）3 to CO2 is higher than those of activated carbon and activated carbon fiber, and increases with the increasing of adsorption pressure or the decreasing of adsorption temperature. Under the conditions of 0.4 MPa and 25 ℃, the CO2-methane mixed gas with 5% or 20% of CO2 volume fraction can be separated effectively using Cu2（BTC）3 as adsorbent, and the lower the CO2 content is , the better the separation effect is.
出处
《化工环保》
CAS
CSCD
北大核心
2012年第5期452-456,共5页
Environmental Protection of Chemical Industry
基金
国家科技支撑计划项目(2008BADC4B12)
深圳市科技开发项目(JSF201006300047A)
关键词
金属有机骨架
气体吸附
二氧化碳
变压吸附
metal-organic frameworks（MOFs）
gas adsorption
carbon dioxide
pressure swing adsorption
