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Minerals 2018, 8(5), 196; https://doi.org/10.3390/min8050196

Adsorption of N2, NO2 and CO2 on Epistilbite Natural Zeolite from Jalisco, Mexico after Acid Treatment

1
Departamento de Investigación en Zeolitas, Universidad Autónoma de Puebla, Puebla 72570, México
2
Doctorado en Nanociencias y Micro-Nanotecnologías, UPIBI, Instituto Politécnico Nacional, Ciudad de México 07340, México
3
Centro de Nanociencias y Nanotecnología, Universidad Autónoma de México, Carretera Tijuana-Ensenada, Km. 107, Ensenada 22860, México
4
Departamento de Química, Universidad Autónoma Metropolitana, Iztapalapa, Ciudad de México 09340, México
5
Facultad de Química, Universidad Autónoma de Puebla, Puebla 72570, México
6
Facultad de Ingeniería Química, Universidad Autónoma de Puebla, Puebla 72570, México
7
Centro Universitario de Vinculación y Transferencia de Tecnología, Universidad Autónoma de Puebla, Puebla 72570, México
8
Departamento de Biociencias e Ingeniería, CIIEMAD, Instituto Politécnico Nacional, Ciudad de México 07340, México
*
Authors to whom correspondence should be addressed.
Received: 15 February 2018 / Revised: 3 May 2018 / Accepted: 4 May 2018 / Published: 5 May 2018
(This article belongs to the Special Issue Natural Zeolites)
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Abstract

Emissions of carbon dioxide (CO2) and nitrogen dioxide (NO2) in recent years has been increased considerably. One way to reduce the concentration of these greenhouse gases in the atmosphere is adsorptive capture. This paper describes the main results of adsorption of N2, NO2, and CO2 on epistilbite, both natural and on samples that were chemically treated at various concentrations of HCl. Data on the adsorption of CO2 and NO2 were evaluated by the Freundlich and Langmuir equations. Additionally, the thermodynamic parameters of adsorption were calculated, including the degree of interaction of the zeolite samples with gases by gradually changing the isosteric heat capacities of adsorption. The acid treatment improves the adsorption capacity of epistilbite with respect to NO2 and CO2, due the replacement of large extra-framework cation by small H+ ions. The improvement in the distribution of pore sizes in epistilbite samples was calculated by the method of Barrett-Joyner-Halenda. The sample H1 that was prepared in a moderately concentrated acid showed the best behavior in the CO2 adsorption processes, while the natural EPIN material preferably adsorbs NO2. View Full-Text
Keywords: sequestration; carbon dioxide; epistilbite; adsorption sequestration; carbon dioxide; epistilbite; adsorption
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Hernández-Espinosa, M.A.; Quiroz-Estrada, K.; Petranovskii, V.; Rojas, F.; Portillo, R.; Salgado, M.A.; Marcelo, M.; Rubio, E.; Felipe, C. Adsorption of N2, NO2 and CO2 on Epistilbite Natural Zeolite from Jalisco, Mexico after Acid Treatment. Minerals 2018, 8, 196.

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