Equilibrium CO2 adsorption on zeolite 13X prepared from natural clays

Garshasbi, Vahid; Jahangiri, Mansour; Anbia, Mansoor

doi:10.1016/j.apsusc.2016.09.161

Cited by 153 publications

(58 citation statements)

References 66 publications

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“…It was taken in a model 30 scanning electron microscope manufactured by XL Philips. The Fourier-transform infrared spectroscopy (FT-IR) was used to investigate the chemical bonds and functional groups attached to the zeolite surface (29). FT-IR was performed with the spectrum GX model apparatus, made in America.…”

Section: Characterization Of the Adsorbentmentioning

confidence: 99%

Adsorption of Sulfur Dioxide on Clinoptilolite/Nano Iron Oxide and Natural Clinoptilolite

2019

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Background: Sulfur dioxide gas is known to include pollutants that are harmful to human health and the environment. Therefore, due to the increase of industrial activities, SO2 gas pollution control is very important. Objectives: The purpose of this study was to investigate the efficiency of sulfur dioxide removal by iron oxide nanoparticles deposited on clinoptilolite zeolite. Methods: Two materials, natural clinoptilolite and clinoptilolite containing iron oxide nanoparticles, were used as adsorbents of SO2. Both materials were characterized via scanning electron microscopy imaging, infrared spectroscopy, and N2 porosimetry, along with the determination of the thermodynamic properties and kinetics of SO2 adsorption. Therefore, breakthrough experiments were carried out at different temperatures and with different contact times. Sulfur dioxide adsorption of a real sample was considered for both adsorbents. Results: The adsorption efficiency of SO2 in the synthetic and actual sample was obtained at 80.3% and 66.7%, respectively, under optimum conditions (temperature of 25°C and duration of 28.5 minutes) by modified zeolite with iron oxide nanoparticles. The removal percentage average of SO2 was also obtained in the synthetic and actual sample at 43.8% and 31.3%, respectively, by zeolite in optimum conditions (temperature of 25°C and contact time of 20.5 minutes). The adsorption of SO2 with both adsorbents followed the pseudo-second-order equation and the adsorption process was an exothermic and spontaneous process. Conclusions: The addition of these iron oxide nanoparticles had a positive impact on the surface area and on SO2 capacity.

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Section: Characterization Of the Adsorbentmentioning

confidence: 99%

Adsorption of Sulfur Dioxide on Clinoptilolite/Nano Iron Oxide and Natural Clinoptilolite

2019

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“…Clays and clay minerals are of significant interest because of their interesting characteristics that make them suitable for industrial applications. They have been accepted as one of the most appropriate low-cost adsorbents and common component in different industrial applications [1][2][3][4][5][6][7]. Among the various types of clays, bentonite is more popular.…”

Section: Introductionmentioning

confidence: 99%

Effect of Structure and Chemical Activation on the Adsorption Properties of Green Clay Minerals for the Removal of Cationic Dye

et al. 2018

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In this study, natural clay minerals with green appearance were treated with sulfuric acid. Mass percentage of acid (wt%), temperature (T), contact time (t) and liquid-to-solid mass ratio (R) are used as the prevailing factors that determine the extent of acid-activation. The values of these factors range from 15–50%, 60–90 °C, 1.5–6 h and 4–7, respectively. The study has focused on the structural changes as well as textural characteristics of the clay. Three activated clay samples were prepared under different treatment conditions. The samples were characterized using X-ray powder diffraction (XRD), fourier transform infrared (FTIR), scanning electron microscope (SEM), chemical analysis and N2 adsorption techniques. Characterization of the treated clay minerals exhibited significant structural changes to a greater extent of acid-activation, from being partially crystalline to being amorphous silica. The surface area and total pore volume of clay increased proportionally with the level of acid treatment. The average pore diameter behaved differently. During the strong acid treatment, a large increase in pore volume and the enlargement of the pore size distribution were observed. This suggests that considerable structural changes and partial destruction may have occurred in this condition. The removal of methylene blue, used as cationic dye, from aqueous solution by the batch adsorption technique on three prepared acid-activated clay samples was studied. The Langmuir model was found to agree well with the experimental data.

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“…Natural sources such as diatomite, kaolinite and other clay minerals have also been used in the synthesis of zeolites. [7][8][9] By varying the composition of synthesis solutions it is possible to obtain zeolites with different structures or the same zeolite showing different chemical compositions. [10][11][12] In summary, keeping the conditions of preparation fixed, a simple variation in the Si/Al ratio may result in different zeolites, for example, faujasite X and sodalite (Si/Al < 2), mordenite and faujasite Y (2 < Si/Al < 5), ZSM-5, ZSM -12 and Beta (Si/Al > 5).…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Optimization and Characterization of Zeolite Beta (BEA): Production of ZSM-5 and NaAlSiO4 as Secondary Phases

Nascimento¹,

Figueredo²,

Silva³

et al. 2017

Rev. Virtual Quim.

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. Em outros ensaios, foram obtidas fases secundárias de NaAlSiO 4 e SiO 2 , bem como zeólita ZSM-5, analcima, omega e Linde B2.Palavras-chave: BEA; razão Si/Al; Tempo; Temperatura. AbstractThe choice of synthesis parameters influences obtainment of a suitable material for use in several applications. In this paper, zeolite beta (BEA) was successfully obtained by hydrothermal synthesis, assessing the following parameters: Si/Al ratio, time and crystallization temperature. The synthesized materials were characterized by X-ray diffraction (XRD), Fourier-Transfer Infrared (FTIR) spectroscopy, thermogravimetry (TG and DTG) and N 2 adsorption-desorption isotherm analyses. Xray diffraction showed that the change of only one of these parameters acts on the formation of the desired microporous structure. BEA was obtained in the Si/Al ratio equal 8, with a crystallization time of 4 days at 170 °C, presenting a specific area of 437 m . In other assays, secondary phases of NaAlSiO 4 and SiO 2 were obtained, as well as ZSM-5 zeolite, analcime, omega and linde B2.

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Equilibrium CO2 adsorption on zeolite 13X prepared from natural clays

Cited by 153 publications

References 66 publications

Adsorption of Sulfur Dioxide on Clinoptilolite/Nano Iron Oxide and Natural Clinoptilolite

Adsorption of Sulfur Dioxide on Clinoptilolite/Nano Iron Oxide and Natural Clinoptilolite

Effect of Structure and Chemical Activation on the Adsorption Properties of Green Clay Minerals for the Removal of Cationic Dye

Synthesis, Optimization and Characterization of Zeolite Beta (BEA): Production of ZSM-5 and NaAlSiO4 as Secondary Phases

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