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[1]杨魁智,黄艳芳,吕勇,等.微分吸附加和法计算多孔材料的吸附特性[J].南京工业大学学报(自然科学版),2017,39(03):45-51.[doi:10.3969/j.issn.1671-7627.2017.03.009]
 YANG Kuizhi,HUANG Yanfang,LYU Yong,et al.Determination of adsorption characteristics for porous materials from the derivative isotherm summation method[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2017,39(03):45-51.[doi:10.3969/j.issn.1671-7627.2017.03.009]
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微分吸附加和法计算多孔材料的吸附特性()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
39
期数:
2017年03期
页码:
45-51
栏目:
出版日期:
2017-05-20

文章信息/Info

Title:
Determination of adsorption characteristics for porous materials from the derivative isotherm summation method
文章编号:
1671-7627(2017)03-0045-07
作者:
杨魁智黄艳芳吕勇段龙马正飞
南京工业大学 化工学院 材料化学工程国家重点实验室,江苏 南京 210009
Author(s):
YANG KuizhiHUANG YanfangLYU YongDUAN LongMA Zhengfei
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University,Nanjing 210009,China
关键词:
模型拟合 多孔材料 吸附等温线 表面 吸附
Keywords:
model fitting porous material adsorption isotherm surface adsorption
分类号:
TQ028.8
DOI:
10.3969/j.issn.1671-7627.2017.03.009
文献标志码:
A
摘要:
采用微分吸附加和法对4种具有代表性和独特孔结构的多孔材料MIL-101、活性炭、SBA-15和NaX分子筛的N2吸附等温线的一阶导数进行拟合。吸附位点方程采用带有吸附质分子相互作用力的Dubinin-Asthakov(DA)、Langmuir和Brunauer-Emmett-Teller(BET)方程。结果表明:微分吸附加和法求取的比表面积和BET、I点法一致。与BET理论相比,该方法考虑了多孔材料表面位点不均匀、吸附质分子间存在相互作用力等因素。拟合结果揭示多孔材料表面存在不同的吸附区域,每个吸附区域存在吸附质与吸附剂作用力不同的吸附位点,而且吸附质分子间的相互作用力不能忽略。此外拟合结果也揭示了导数拟合可以作为对普通吸附等温线的新的拟合途径。
Abstract:
The derivative isotherms of the nitrogen adsorption data on four typical,representative porous materials,MIL-101,an activated carbon,SBA-15 and NaX zeolite were fitted by the derivative isotherm summation(DIS)method with the individual isotherm types of Dubinin-Asthakov(DA),Langmuir and Brunauer-Emmett-Teller(BET)including lateral interactions.Results showed that the surface areas calculated from the DIS method were almost the same with the BET and I-point method.Comparing the adsorption mechanism with the BET model with considering surface heterogeneous information and the lateral interactions between the adsorbed molecules,the fitting results showed that the surface of porous materials had different adsorption areas,each adsorption area could be fitted by several local isotherms with different interactions between adsorbate and adsorbent,and the lateral interactions between adsorbed molecules could not be neglected.The results also suggested that they would be used as a general method for adsorption equilibrium data fitting.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2016-03-16
作者简介:杨魁智(1992—),男,湖南南县人,硕士,主要研究方向为气体吸附分离; 马正飞(联系人),教授,E-mail:mazf@njtech.edu.cn.
引用本文:杨魁智,黄艳芳,吕勇,等.微分吸附加和法计算多孔材料的吸附特性[J].南京工业大学学报(自然科学版),2017,39(3):45-51..
更新日期/Last Update: 2017-05-31