超临界氢气在炭微孔内吸附的理论研究  

THEORETICAL STUDY ON THE EXCESS ADSORPTION OF HYDROGEN UNDER SUPERCRITICAL STATE IN MICROPORES OF CARBONACEOUS ADSORBENTS

作　　者：郑青榕[1] 顾安忠[1] 杨晓东[1] 鲁雪生[1] 

机构地区：[1]上海交通大学动力与能源工程学院,上海200030

出　　处：《炭素技术》2001年第4期10-14,共5页Carbon Techniques

摘　　要：超临界吸附理论的发展是评价当前炭材料吸附储氢性能的关键。基于能量平衡原理 ,推导出能反映超临界高压氢气在炭狭缝微孔内过剩吸附的特点的格子理论Ono Kondo方程。在AX - 2 1活性炭氢吸附试验结果上标定一预测超临界温度氢气在炭微孔内过剩吸附的Ono Kondo吸附等温方程。最后 ,在验证方程的通用性时发现 ,在一定试验范围内 (0～ 30MPa ,77～ 2 98K)方程预测精度较GCMC分子模拟的预测精度高 ,并能很好地预测其他文献报道的氢吸附试验结果。The development of the supercritical adsorption theory plays a key role in evaluating the adsorptive performance of the carbon adsorbents in hydrogen storage.A new Ono-Kondo equation,based on the lattice theory,is developed to describe the supercritical fluid adsorption inside the slit-shaped micropores of adsorbents.The analytical solution to the equation is applied to predict the hydrogen adsorption at supercritical high-pressure inside the pores of the adsorbents.On the basis of the hydrogen adsorption data on activated carbon AX-21,the analytical solution is further modified to evaluate the applicable range of the theory.The accuracy of the defined Ono-Kondo equation is verified by comparing the predicted results with other hydrogen adsorption data and with those from the GCMC molecular simulation on AX-21 activated carbon over the temperature range 77～298 K and for pressure up to 30 MPa.The good agreement between the predicted results and the experimental data confirms the reasonability of the fixed values for the equation.

关 键 词：过剩吸附 超临界条件 Ono-Kondo方程 氢气储存 炭微孔内吸附 

分 类 号：O613.71[理学—无机化学] TQ424.2[理学—化学]