Mechanism analysis of hydrochloric and acetic acids dissolving clay minerals

Yan, Fuli; Shi, Yongmin; Tian, Yu; Zheng, Haimei; Hu, Qiangqiang; Yu, Jiaxing

doi:10.1016/j.geoen.2023.211469

Cited by 3 publications

(1 citation statement)

References 31 publications

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“…Additionally, the intercalated compounds of Mt with small molecules are generally prepared in an open reactor at a certain temperature, and this process can take a long time, usually between 12 h and 48 h [ 13 , 19 , 27 ]. However, there are cases where it took 4 days for the reaction to take place [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

New Methodology for Modifying Sodium Montmorillonite Using DMSO and Ethyl Alcohol

Stoski,

Machado,

Vilsinski

et al. 2024

Materials

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Modified clays with organic molecules have many applications, such as the adsorption of pollutants, catalysts, and drug delivery systems. Different methodologies for intercalating these structures with organic moieties can be found in the literature with many purposes. In this paper, a new methodology of modifying Sodium Montmorillonite clays (Na-Mt) with a faster drying time was investigated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), BET, and thermogravimetric analysis (TG and DTG). In the modification process, a mixture of ethyl alcohol, DMSO, and Na-Mt were kept under magnetic stirring for one hour. Statistical analysis was applied to evaluate the effects of the amount of DMSO, temperature, and sonication time on the modified clay (DMSO-SMAT) using a 23-factorial design. XRD and FTIR analyses showed the DMSO intercalation into sodium montmorillonite Argel-T (SMAT). An average increase of 0.57 nm for the interplanar distance was found after swelling with DMSO intercalation. BET analysis revealed a decrease in the surface area (from 41.8933 m2/g to 2.1572 m2/g) of Na-Mt when modified with DMSO. The porosity increased from 1.74 (SMAT) to 1.87 nm (DMSO-SMAT) after the application of the methodology. Thermal analysis showed a thermal stability for the DMSO-SMAT material, and this was used to calculate the DMSO-SMAT formula of Na[Al5Mg]Si12O30(OH)6 · 0.54 DMSO. Statistical analysis showed that only the effect of the amount of DMSO was significant for increasing the interlayer space of DMSO-SMAT. In addition, at room temperature, the drying time of the sample using this methodology was 30 min.

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