Ammonia Sorption on the Composites "(BaCl2 + BaBr2) Inside Vermiculite Pores" | Sciact - CRIS-system of Boreskov Institute of Catalysis

Ammonia Sorption on the Composites "(BaCl2 + BaBr2) Inside Vermiculite Pores" Full article

Journal

Colloids and Surfaces A: Physicochemical and Engineering Aspects
ISSN: 0927-7757

Output data

Year: 2014, Volume: 448, Pages: 169-174 Pages count : 6 DOI: 10.1016/j.colsurfa.2014.02.025

Tags

Ammonia sorption, Barium halides, Composite sorbents, Salt solid solution, Vermiculite

Authors

Grekova A.D. ^1,2 , Veselovskaya J.V. ^1,2 , Tokarev M.M. ¹ , Krieger T.A. ¹ , Shmakov A.N. ^1,2 , Gordeeva L.G. ^1,2

Affiliations

1	Boreskov Institute of Catalysis, Ac. Lavrentieva av. 5, Novosibirsk 630090, Russia
2	Novosibirsk State University, Pirogova str. 2, Novosibirsk 630090, Russia

This paper presents the data on the phase composition and ammonia sorption equilibrium of the new composite sorbents “(BaCl2 + BaBr2) inside vermiculite pores” intently prepared for adsorptive cooling. Phase transformation of the composites during ammonia sorption was characterized by in situ X-ray diffraction. The isotherms of ammonia sorption on the composites were measured in the ammonia pressure range P = 0–10 bar at temperatures T = 303–343 K. The formation of the salts solid solution BaClxBr2−x inside the vermiculite pores was observed. Due to the ammonia sorption this solution transformed to the complex BaClxBr2−x·8NH3, which formation was observed at intermediate ammonia pressure between those for the single salts BaCl2 and BaBr2. The isosteric enthalpy ΔH of ammonia sorption on the composites with molar ratio BaCl2/BaBr2 3:2 and 1:1.2 equals (−35 ± 3) kJ/mol and does not depend on the ammonia uptake. The isosteric entropy ΔS changes from (−115 ± 2) to (−133 ± 2) J/(mol K) with the increase in the ammonia sorption from 1 to 7 mol NH3/mol salt.

Grekova A.D. , Veselovskaya J.V. , Tokarev M.M. , Krieger T.A. , Shmakov A.N. , Gordeeva L.G.
Ammonia Sorption on the Composites "(BaCl2 + BaBr2) Inside Vermiculite Pores"
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2014. V.448. P.169-174. DOI: 10.1016/j.colsurfa.2014.02.025 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Jul 18, 2013
Accepted:	Feb 10, 2014
Published online:	Feb 18, 2014
Published print:	Apr 20, 2014

Web of science:	WOS:000334141100022
Scopus:	2-s2.0-84896783712
Elibrary:	21868012
Chemical Abstracts:	2014:437970
OpenAlex:	W2000941973

DB	Citing
Web of science	10
Scopus	12
Elibrary	10
OpenAlex	11