|Table of Contents|

Determination of adsorption characteristics for porous materials from the derivative isotherm summation method(PDF)


Research Field:
Publishing date:


Determination of adsorption characteristics for porous materials from the derivative isotherm summation method
YANG KuizhiHUANG YanfangLYU YongDUAN LongMA Zhengfei
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University,Nanjing 210009,China
model fitting porous material adsorption isotherm surface adsorption
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.


[1] LU K.Porous and high surface area silicon oxycarbide-based materials:a review[J].Materials science and engineering:R:reports,2015,97:23.
[2] DEHGHAN M,VALIPOUR M S,KESHMIRI A,et al.On the thermally developing forced convection through a porous material under the local thermal non-equilibrium condition:an analytical study[J].International journal of heat and mass transfer,2016,92:815.
[3] AGOSTINI G,PIOVANO A,BERTINETTIL L,et al.Effect of different face centered cubic nanoparticle distributions on particle size and surface area determination:a theoretical study[J].Journal of physical chemistry C,2014,118(8):4085.
[4] ARVANITI E C,JUENGER M C G,Bernal S A,et al.Determination of particle size,surface area,and shape of supplementary cementitious materials by different techniques[J].Materials and structures,2015,48(11):3687.
[5] 格雷格,敬琮.吸附、比表面与孔隙率[M].北京:化学工业出版社,1989:49.
[6] LKEWELLYA P L,RODRIQUEZ-REINOSO F,ROUQEROL J,et al.Studies in surface science and catalysis[M].[S.l.]:Elsevier,2007:49.
[7] POMONIS P J,PETRAKIS D E,LADAVOS A K,et al.A novel method for estimating the C-values of the BET equation in the whole range 0<p/p0<1 using a scatchard-type treatment of it[J].Microporous and mesoporous materials,2004,69(1/2):97.
[8] VILLIERAS F,CASES J M,FRANCOIS M,et al.Texture and surface energetic heterogeneity of solids from modeling of low-pressure gas-adsorption isotherms [J].Langmuir,1992,8(7):1789.
[9] VILLIERAS F,MICHOT L J,BARDOT F,et al.An improved derivative isotherm summation method to study surface heterogeneity of clay minerals[J].Langmuir,1997,13(5):1104.
[10] 郭金涛,陈勇,荆钰,等.以醋酸盐为矿化剂合成金属有机骨架MIL-101[J].高等学校化学学报,2012,33(4):668.
[11] 张杨,李来生,程彪平,等.新型靛红衍生化β-环糊精键合SBA-15液相色谱固定相的制备与表征[J].分析化学,2014,42(3):375.
[12] COLLINS K E,COLLINS C H,MARONEZE C M,et al.Evaluations of the BET,I-Point,and α-plot procedures for the routine determination of external specific surface areas of highly dispersed and porous silicas[J].Langmuir,2011,27(1):187.
[13] RICHARDS R M,GOMEZ I,OTAZO-SANCHEZ E M,et al.High Mn2+ uptake by a new polyvinyl alcohol derivative:isotherm model analysis[J].Separation science and technology,2015,50(2):233.


Last Update: 2017-05-31