Thermochemical and catalytic properties of modified bentonites

T. L. Rakitskaya; T. A. Kiose; L. P. Oleksenko; A. M. Djiga; V. Y. Volkova

doi:10.15407/hftp06.02.196

Authors

T. L. Rakitskaya Mechnickov National University of Odessa
T. A. Kiose Mechnickov National University of Odessa
L. P. Oleksenko Taras Shevchenko National University of Kyiv
A. M. Djiga Mechnickov National University of Odessa
V. Y. Volkova Mechnickov National University of Odessa

DOI:

https://doi.org/10.15407/hftp06.02.196

Keywords:

bentonites, modification, thermochemical behavior, catalytic activity, carbon monoxide, oxidation

Abstract

Thermochemical properties of bentonites, natural (from three Ukrainian deposits) and modified by physical and chemical methods have been investigated. The three-step mass loss process with two endothermic effects in the ranges of 130–150°C and 500–600°C was observed for all bentonite samples under study. These natural and modified bentonites were used as supports for obtaining palladium(II)-copper(II) catalysts for carbon monoxide oxidation. The activity of the catalysts has been found to depend on both the origin of bentonites and the techniques of their modification

References

1. Centi G., Parathonor S. Catalysis by layered materials: A review. Micropor. Mesopor. Mater., 107 (2008) 3.

2. Rakitskaya Т.L., Кiose Т.А., Оleksenko L.P. et al. The effect of water capacity on the activity of Pd(II)-Cu(II) catalyst anchored to acid-modified clinoptilolite in the reaction of low-temperature carbon monoxide oxidation. Visn. Odes. Univer. Khimiya, 16 (2011) 5 (in Russian).

3. Тarasevich Y.I., Ovcharenko F.D. Adsorption on Clay Materials, Naukova dumka, Kiev, 1975, 362 p. (in Russian).

4. Тarasevich Y.I., Ovcharenko F.D. Structure and Chemistry of Surface of Layered Silicates, Naukova dumka, Kiev, 1988, (in Russian).

5. Tyagi B., Chudasama C.D., Jasra R.V. Characterization of surface acidity of an acid montmorillonite activated with hydrothermal, ultrasonic and microwave techniques. Appl. Clay Sci., 31 (2006) 16.

6. Nogueira F.G.E., Lopes J.H., Silva A.C. et al. Catalysts based on clay and iron oxide for oxidation of toluene. Appl. Clay Sci., 51 (2011) 385.

7. Clearfield A. Preparation of pillared clays and their catalytic properties in Advanced Catalysts and Nanostructured Materials: Modern Synthetic Methods, Academic Press, San Diego, 1996, 345.

8. Rakitskaya Т.L., Кiose Т.А., Volkova V.Y., Ennan A.A. The use of Ukrainian natural aluminosilicates for development of new metal-complex catalysts for air purification from gaseous toxic substantions, Energo-tekhnologii i resursosberezhenie, 6 (2009) 18 (in Russian).

8. Rhodes C.N., Franks M., Parkes G.M.B., Brown D.R. The effect of acid treatment on the activity of clay supports for ZnC12alkylation catalysts, J. Chem. Soc., Chem. Commun., 12 (1991) 804.

10. Rakitskaya Т.L., Кiose Т.А., Reznik L.I. Natural and chemically modified basalt tuffs. Phase composition and catalytic activity of surface Cu(II)-Pd(II) complexes in the reaction of carbon monoxide with oxygen, Chemistry, Physics and Technology of Surface, 3 (2012) 215 (in Russian).

11. Rakytskaya T.L., Kiose T.A., Truba A.S. et al. Adsorption of water vapour by natural and chemically modified clinoptilolite and mordenite samples, Chemistry, Physics and Technology of Surface, 3 (2012) 455.

12. Dellisanti F., Minguzzi V., Valdre G. Thermal and structural properties of Ca-rich montmorillonite mechanically deformed by compaction and shear, Appl. Clay Sci., 31 (2006) 282.

13. Onal M., Sarikaya Y. Thermal behavior of bentonite, J. Therm. Anal. Calorim., 90 (2007) 167.

14. Nogueira F.G.E., Lopes J.H., Silva A.C. et al. Catalysts based on clay and iron oxide for oxidation of toluene, Appl. Clay Sci., 51 (2011) 385.

15. Rakitskaya T.L., Kiose T.A., Zryutina A.M. et al. Solid-state catalysts based on bentonites and Pd(II)‑Cu(II) complexes for low-temperature carbon monoxide oxidation, Solid State Phenomena, 200 (2013) 299.

16. Rakitskaya Т.L., Кiose Т.А., Оleksenko L.P. et al. Effect of a water content on the activity of Pd(II)-Cu(II) catalyst anchored to acid-modified basalt tuff in carbon monoxide oxidation, Zhurn. Priklad. Khimii, 85 (2012) 1422 (in Russian).