Adsorption of gaseous SO2 and structural changes of montmorillonite
Source abstract
Abstract
Abstract Several montmorillonite samples after adsorption of gaseous SO 2 were analyzed to evaluate structural and textural changes. The equilibrium adsorption of the SO 2 gas was measured at 25 °C and 0.1 MPa. The samples were characterized by X-ray diffraction (XRD), infrared spectroscopy (IR), swelling index (SI), pH measurements, and N 2 adsorption–desorption isotherms. SO 2 adsorption increased with the specific surface area of montmorillonite. SO 2 retention decreased pH of the dispersed samples from 6 to 1 and released interlayer and octahedral cations from the structure, which increased the specific BET surface area and specific micropore surface similar to that of acid-activated montmorillonite.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Layered Double Hydroxides Synthesis and Applications · Clay minerals and soil interactions · Mesoporous Materials and Catalysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (25)
Show source-provided references
1. Unique adsorption properties and potential energy profiles of microporous pillared clays10.1002/aic.690380906 ↗
2. Acid activation and bleaching capacity of bentonites from the islands of Milos and Chios, Aegean, Greece10.1016/S0169-1317(97)00017-3 ↗
3. Farmer · 1974
4. Performance of an Argentine acid-activated bentonite in the bleaching of soybean oil10.1590/S0104-66322003000200007 ↗
5. Industrial applications of sepiolite from Vallacas-Vical, Sapin: a review
6. Properties and applications of palygorskite-sepiolite clays10.1180/claymin.1996.031.4.01 ↗
7. Gregg · 1991
8. Hall Gómez, D., Volzone, C., Hülsken, A., Ortiga, J., Caro, J.F., 2002. Evaluación de materiales tobáceos modificados como adsorbentes de CO2 y CH. Revista de Ciencia y Tecnología. Facultad de Ciencias Exactas, Químicas y Naturales. Centro de Investigación y Desarrollo Tecnológico. Universidad Nacional de Misiones. Año 4, No. 4b, 26–32.
9. Chemically modified smectites10.1180/0009855033810083 ↗
10. Montmorillonite minerals
11. Swelling and cation exchange capacity relationship for the samples obtained from a bentonite by acid activation and heat treatments10.1016/j.clay.2006.12.004 ↗
12. Infrared spectroscopy study of SiOx films produced by plasma enhanced chemical vapour deposition10.1116/1.573833 ↗
13. Deodorizing paper using beta-sepiolite
14. Tratamiento ácido y alcalino de un mineral tobáceo de la provincia de Neuquén, para su análisis como adsorbente de gases
15. Modified bentonitic clay minerals for CO, CO2 and SO2 adsorption10.1016/S1387-1811(02)00443-2 ↗
16. Bentonitas tratadas con compuestos orgánicos para retención de gases: SO2 y CO
17. Retention of pollutant gases: comparison between clay minerals and their modified products10.1016/j.clay.2006.06.013 ↗
18. Retention of OH–Al complexes by dioctahedral smectites10.1180/000985501547394 ↗
19. Removal of gases by thermal-acid leached kaolinitic clays: influence of mineralogical composition10.1016/j.clay.2005.11.001 ↗
20. Volzone, C., Porto López, J.M., Pereira, E., 1986. Acid activation of an smectite material. I. Structural analysis, Rev. latinoam. ing. quím. quím. apl. 16, 205–215.
21. Retención de SO2 en tobas y bentonitas modificadas por métodos físicos”
22. Retention of gases by hexadecyltrimethylammonium-montmorillonite10.1016/j.jenvman.2005.07.004 ↗
23. The influence of acid treatment on the composition of bentonite10.1346/CCMN.2006.0540605 ↗
24. Pillared clays as a new class of sorbents for gas separation10.1002/aic.690370506 ↗
25. Yang · 1995 · 73