Adsorption of N2 and CO2 on zeolite X exchanged with potassium, barium, or lanthanum

被引：42

作者：

Siporin, SE ^{[1
]}

McClaine, BC ^{[1
]}

Davis, RJ ^{[1
]}

机构：

[1] Univ Virginia, Dept Chem Engn, Charlottesville, VA USA

来源：

LANGMUIR | 2003年 / 19卷 / 11期

关键词：

D O I：

10.1021/la020971n

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The zeolite X ion exchanged with K Ba, or La was tested for the adsorption of N-2 and CO2. The physical adsorption of N-2 at 77 K confirmed that the zeolite framework remained intact after exchange and thermal treatment. The isotopic transient analysis of N-2 adsorbed on the samples at 303-333 K indicated that BaX had the highest uptake of N-2, with a heat of adsorption equal to 4.5 kcal mol(-1). In addition, the vibrational frequency of adsorbed N-2 was most perturbed by the presence of Ba cations. Results from Fourier transform infrared (FT-IR) spectroscopy showed that hydroxyl groups were associated with both the Ba and the La cations in the zeolites. FT-IR spectroscopy of adsorbed CO2 confirmed that the K form of zeolite X was the most basic with respect to forming surface carbonates.

引用

页码：4707 / 4713

页数：7

共 50 条

[11] NATURE OF RARE-EARTH EXCHANGED Y-ZEOLITES [J].

BOLTON, AP .

JOURNAL OF CATALYSIS, 1971, 22 (01) :9-&

[12] Interaction of N2, CO and NO with Cu-exchanged ETS-10:: a compared FTIR study with other Cu-zeolites and with dispersed Cu2O [J].

Bordiga, S ;

Pazé, C ;

Berlier, G ;

Scarano, D ;

Spoto, G ;

Zecchina, A ;

Lamberti, C .

CATALYSIS TODAY, 2001, 70 (1-3) :91-105

[13] NATURE OF RESIDUAL OH GROUPS ON SERIES OF NEAR-FAUJASITE ZEOLITES [J].

CARTER, JL ;

LUCCHESI, PJ ;

YATES, DJC .

JOURNAL OF PHYSICAL CHEMISTRY, 1964, 68 (06) :1385-&

[14]

COE CG, 1986, P 7 INT ZEOL C TOKY

[15]

COE CG, 1990, PROCESS TECHNOLOGY P

[16] EXPERIMENTAL AND THEORETICAL DETERMINATION OF VIBRATIONAL FREQUENCY-SHIFTS OF DIATOMIC-MOLECULES ADSORBED IN NAA ZEOLITE - INTERACTION POTENTIAL AND ITS DERIVATIVES WITH RESPECT TO THE INTERNAL COORDINATE OF H2, D2, N2, O2 [J].

DELARA, ERC .

MOLECULAR PHYSICS, 1989, 66 (02) :479-492

[17] Structure and surface and catalytic properties of Mg-Al basic oxides [J].

Di Cosimo, JI ;

Diez, VK ;

Xu, M ;

Iglesia, E ;

Apesteguia, CR .

JOURNAL OF CATALYSIS, 1998, 178 (02) :499-510

[18] Spectroscopic characterization and catalytic activity of zeolite X containing occluded alkali species [J].

Doskocil, EJ ;

Davis, RJ .

JOURNAL OF CATALYSIS, 1999, 188 (02) :353-364

[19] Ammonia synthesis catalyzed by ruthenium supported on basic zeolites [J].

Fishel, CT ;

Davis, RJ ;

Garces, JM .

JOURNAL OF CATALYSIS, 1996, 163 (01) :148-157

[20]

FORSTER H, 1977, J CHEM PHYS, V66, P5237, DOI 10.1063/1.433789

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