摘要
文章基于从格子理论导出的通用吸附等温方程分析氢在多壁碳纳米管(MWCNTs)和AX-21活性炭上的平衡吸附数据。通过吸附平衡态中吸附质分子的能量分析,确定氢分子受到的壁面作用势和在吸附表面的最大聚集密度,并由通用吸附等温方程的线性标绘确定平衡态中氢分子间的作用能。结果表明,吸附氢分子间的作用能随氢分子表面聚集密度线性变化,但由于氢分子在二吸附剂吸附空间受到不同强度的壁面吸附势,氢分子在二吸附剂上具有不同的吸附行为。
A lattice theory-based approximate adsorption model was derived to study adsorption data of hydrogen on Multi-walled Carbon Nanotubes （MWCNTs） and activated carbons AX-21. The principles of thermodynamic equilibrium in each adsorption equilibrium state were concentration and the interaction potential exerted on applied to the model for determining the maximum surface hydrogen molecules, and the molecular interaction energy among hydrogen molecules was determined by the linear fit of the adsorption data. The results show that the molecular interaction energies are nearly linear with the surface concentration, but the variation tendency is different on MWCNTs and AX-21 due to different strength of adsorption potentials from surfaces exerted on hydrogen molecules. Comparison of the temperature dependence of the interaction energies on both adsorbents reveals a much complicated behavior of hydrogen molecules in MWCNTs-hydrogen adsorption system.
出处
《化学工程》
CAS
CSCD
北大核心
2008年第6期8-11,共4页
Chemical Engineering(China)
基金
福建省青年人才创新项目(2006F3092)
福建省自然科学基金项目(2006J0452)
集美大学科研基金项目(F05008)
关键词
氢气
吸附
炭材料
作用能
hydrogen
adsorption
carbon materials
interaction energy
