European Journal of Chemistry 2020, 11(2), 100-104 | doi: https://doi.org/10.5155/eurjchem.11.2.100-104.1960 | Get rights and content






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Basicity determination of SBA-15 doped with different alkaline metals through CO2 adsorption and isopropanol decomposition


Natalia Romina Reale (1) orcid , Maria Virginia Cagnoli (2,*) orcid

(1) Departamento de Ingeniería Química, Facultad de Ingeniería, Universidad Nacional de La Plata, Centro de Investigación y Desarrollo en Ciencias Aplicadas, Consejo Nacional de Investigaciones Científicas y Técnicas, Calle 47, Nº. 257, 1900, La Plata, Argentina
(2) Departamento de Ingeniería Química, Facultad de Ingeniería, Universidad Nacional de La Plata, Centro de Investigación y Desarrollo en Ciencias Aplicadas, Consejo Nacional de Investigaciones Científicas y Técnicas, Calle 47, Nº. 257, 1900, La Plata, Argentina
(*) Corresponding Author

Received: 03 Jan 2020 | Revised: 05 Mar 2020 | Accepted: 09 Mar 2020 | Published: 30 Jun 2020 | Issue Date: June 2020

Abstract


In order to increase the activity and selectivity towards to light olefins in the Fischer-Tropsch synthesis, new support for the role of iron (Fe) are presented. Thus, SBA-15 was synthetized and doped with different alkaline metals preserving the structural characteristics of the mesoporous solid. The samples were characterized by X-ray diffraction at low angles, N2 adsorption, atomic absorption spectroscopy, CO2 desorption at programmed temperature and isopropanol test. The alkaline metals (Li, K and Cs) introduction into the channels of the solid, generate basic sites of different strength that are not present in the SBA-15 without doping and do not produce significant changes in the structural and textural properties of the SBA-15, only a densification in the walls of the channels is evidenced. According to the alkaline metal used and through CO2 adsorption and isopropanol decomposition, it was possible to established the order by the total number of sites: Li >> K » Cs, and the force order for both types of sites (weak and intermediate): Li > Cs > K.


Keywords


SBA-15; Supported iron; Alkaline cations; CO decomposition; Isopropanol reaction; Fischer-Tropsch synthesis

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DOI: 10.5155/eurjchem.11.2.100-104.1960

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How to cite


Reale, N.; Cagnoli, M. Eur. J. Chem. 2020, 11(2), 100-104. doi:10.5155/eurjchem.11.2.100-104.1960
Reale, N.; Cagnoli, M. Basicity determination of SBA-15 doped with different alkaline metals through CO2 adsorption and isopropanol decomposition. Eur. J. Chem. 2020, 11(2), 100-104. doi:10.5155/eurjchem.11.2.100-104.1960
Reale, N., & Cagnoli, M. (2020). Basicity determination of SBA-15 doped with different alkaline metals through CO2 adsorption and isopropanol decomposition. European Journal of Chemistry, 11(2), 100-104. doi:10.5155/eurjchem.11.2.100-104.1960
Reale, Natalia, & Maria Virginia Cagnoli. "Basicity determination of SBA-15 doped with different alkaline metals through CO2 adsorption and isopropanol decomposition." European Journal of Chemistry [Online], 11.2 (2020): 100-104. Web. 9 Jul. 2020
Reale, Natalia, AND Cagnoli, Maria. "Basicity determination of SBA-15 doped with different alkaline metals through CO2 adsorption and isopropanol decomposition" European Journal of Chemistry [Online], Volume 11 Number 2 (30 June 2020)

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DOI Link: https://doi.org/10.5155/eurjchem.11.2.100-104.1960

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