Calorimetric heats of adsorption and adsorption isotherms .3. Mixtures of CH4 and C2H6 in silicalite and mixtures of CO2 and C2H6 in NaX

被引：69

作者：

Dunne, JA ^{[1
]}

Rao, M ^{[1
]}

Sircar, S ^{[1
]}

Gorte, RJ ^{[1
]}

Myers, AL ^{[1
]}

机构：

[1] UNIV PENN,DEPT CHEM ENGN,PHILADELPHIA,PA 19104

来源：

LANGMUIR | 1997年 / 13卷 / 16期

关键词：

D O I：

10.1021/la960984z

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Individual heats of adsorption and selectivity of mixtures have been measured simultaneously in a calorimeter. After the weakly adsorbed component was preloaded the dosing of both components to the sample cell was adjusted to hold the loading of the weakly adsorbed component constant. Agreement with ideal adsorbed solution theory is quantitative for mixtures of CH4 and C2H6 at low coverage in an adsorbent with a weak electric field (silicalite). Mixtures of quadrupolar (CO2) and nonpolar (C2H6) gases in an adsorbent with a strong electric field (NaX) exhibit strong negative deviations from ideality. The experimental heats of adsorption are larger than those for an ideal solution, in agreement with the results of molecular simulation.

引用

页码：4333 / 4341

页数：9

共 11 条

[1] Calorimetric heats of adsorption and adsorption isotherms .1. O-2, N-2, Ar, CO2, CH4, C2H6 and SF6 on silicalite
Dunne, JA
Mariwals, R
Rao, M
Sircar, S
Gorte, RJ
Myers, AL
[J]. LANGMUIR, 1996, 12 (24) : 5888 - 5895
[2] Calorimetric heats of adsorption and adsorption isotherms .2. O-2, N-2, Ar, CO2, CH4, C2H6, and SF6 on NaX, H-ZSM-5, and Na-ZSM-5 zeolites
Dunne, JA
Rao, M
Sircar, S
Gorte, RJ
Myers, AL
[J]. LANGMUIR, 1996, 12 (24) : 5896 - 5904
[3] ADSORPTION OF ETHANE AND PROPANE IN SILICALITE-1 AND ZEOLITE NAY - DETERMINATION OF SINGLE COMPONENTS, MIXTURE AND PARTIAL ADSORPTION DATA USING AN ISOSTERIC SYSTEM
HAMPSON, JA
REES, LVC
[J]. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1993, 89 (16): : 3169 - 3176
[4] KARAVIAS F, 1992, LANGMUIR, V7, P3118
[5] STRETCHING FREQUENCIES OF CATION CO ADDUCTS IN ALKALI-METAL EXCHANGED ZEOLITES - AN ELEMENTARY ELECTROSTATIC APPROACH
LAMBERTI, C
BORDIGA, S
GEOBALDO, F
ZECCHINA, A
AREAN, CO
[J]. JOURNAL OF CHEMICAL PHYSICS, 1995, 103 (08) : 3158 - 3165
[6] Comparison of molecular simulation of adsorption with experiment
Myers, AL
Calles, JA
Calleja, G
[J]. ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, 1997, 3 (02): : 107 - 115
[7] EXCESS PROPERTIES AND COLUMN DYNAMICS OF MULTICOMPONENT GAS-ADSORPTION
SIRCAR, S
[J]. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1985, 81 : 1541 - 1545
[8] ESTIMATION OF ISOSTERIC HEATS OF ADSORPTION OF SINGLE GAS AND MULTICOMPONENT GAS-MIXTURES
SIRCAR, S
[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1992, 31 (07) : 1813 - 1819
[9] SMITH JM, 1996, INTRO CHEM ENG THERM, P536
[10] Activity coefficients of adsorbed mixtures
Talu, O
Li, JM
Myers, AL
[J]. ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, 1995, 1 (02): : 103 - 112

← 1 2 →