二氧化物气体在Cu-BTC中的分子筛效应理论计算
发布时间:2018-01-01 18:44
本文关键词:二氧化物气体在Cu-BTC中的分子筛效应理论计算 出处:《功能材料》2016年10期 论文类型:期刊论文
更多相关文章: CBMC DFT Cu-BTC SO 分子筛效应 吸附
【摘要】:以构型导向Monte Carlo(CBMC)方法模拟了体系温度为298K,气体压强为0.1~100kPa下Cu-BTC对SO_2、CO_2、NO_2吸附密度分布。并利用密度泛函理论(DFT)研究了Cu-BTC单元结构对客体分子(SO_2、CO_2、NO_2)的吸附能。结果表明,Cu-BTC单元结构对SO_2具有更高的吸附能。在比较了3种气体吸附过程后,进一步指出,在单一气体吸附与竞争吸附过程中,Cu-BTC对二氧化物气体粒子分子筛效应是其本身的结构能量差异以及客体分子能量差异综合作用的结果。
[Abstract]:In order to guide Monte Carlo configuration (CBMC) method to simulate the system temperature is 298K, gas pressure of 0.1~100kPa Cu-BTC on SO_2, CO_2, NO_2 adsorption density distribution. And using the density functional theory (DFT) of the Cu-BTC cell structure of the guest molecules (SO_2, CO_2, NO_2). The results show that the adsorption energy, Cu-BTC the SO_2 cell structure has higher adsorption energy. Further pointed out in a comparison of 3 kinds of gas adsorption process, in a single, gas adsorption and competitive adsorption process of Cu-BTC dioxide gas particle molecular sieve effect is the difference of the energy structure itself and the comprehensive effect of the energy difference between the guest molecules.
【作者单位】: 兰州理工大学理学院;
【基金】:国家自然科学基金资助项目(50873047) 甘肃省科技计划资助项目(1010RJZA045)
【分类号】:O647.31
【正文快照】: 0引言随着工业技术不断发展,煤炭燃烧向大气中释放了大量二氧化物气体,其中SO2与NO2可形成酸雨,CO2会造成温室效应,造成了大量环境危机与财产损失。减少该种气体在空气中的排放是解决环境问题的重要难题。MOFs(metal organic frameworks)是由单元骨架结构所组装的多孔高分子材,
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