Adsorption of water from methanol solution using various adsorbent

Hendriyana,; Prabowo, Bambang Hari; Nurdini, Lulu; Trilaksono, Gatot

doi:10.1063/1.5011888

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…4A molecular sieve is an alkali metal silicate that has a simple preparation method and good adsorption ability, which has been widely used in laboratories and industrial environment (Parinyakit et al 2021 andXiong Y H et al 2019). Hendriyana et al (2017) found that 4A molecular sieve had a stronger ability to adsorb water in methanol solution than sodium sulfate and magnesium sulfate through batch experiments. Tomadakis et al (2018) reported that 4A molecular sieve could signi cantly increase the concentration of sulfur dioxide in the adsorbed product with high recovery rate when used for pressure swing adsorption of carbon dioxide and methane mixed with a small amount of hydrogen sul de.…”

Section: Introductionmentioning

confidence: 98%

Preparation of Carbon nitride/Carbon dots/4A molecular sieve composite and evaluation of adsorption performance for Methylene Blue

Jia,

Xia,

Zhao

et al. 2024

Preprint

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The discharge of dye wastewater poses significant hazards to the ecological environment and human health. In this paper, a new composite material carbon nitride/carbon dots/4A molecular sieve (C3N4/CDs/4A) was prepared by using urea, citric acid and 4A molecular sieve to remove dyes from wastewater. The material was characterized by SEM, FTIR and XRD tests to prove the successful preparation of C3N4/CDs/4A. Compared with 4A molecular sieve, the C3N4/CDs/4A had a larger specific surface area of 164.54 m2/g. The C3N4/CDs/4A had great adsorption performance for methylene blue (MB), with the adsorption capacity of up to 44.34 mg/g. Adsorption isotherm and kinetic studies showed that the adsorption of MB on C3N4/CDs/4A followed Langmuir isotherm (R2 = 0.999) and pseudo-second-order kinetic model (R2 = 1). In addition, the C3N4/CDs/4A maintained almost the same adsorption amount for MB in the pH range of 5–11 and was less affected by temperature. Furthermore, the excellent thermal regeneration performance of C3N4/CDs/4A laid a foundation for its industrial application. This study provided a new method for treating refractory dye wastewater.

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Section: Introductionmentioning

confidence: 98%

Preparation of Carbon nitride/Carbon dots/4A molecular sieve composite and evaluation of adsorption performance for Methylene Blue

Jia,

Xia,

Zhao

et al. 2024

Preprint

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“…Zhang et al 26 studied the removal of trace water from anisole by adsorption, and for an aqueous solution of anisole at 580 ppm, the water content of the solvent after adsorption by 3A and 4A molecular sieves was in the range of 10−25 and 13−26 ppm, respectively. Zhao et al 27 used 4A molecular sieves to reduce the water content of dimethyl carbonate from 40 to 3 mg/L, effectively ensuring the application of dimethyl carbonate as an electrolyte solvent. Hendriyana et al 28 used 3A molecular sieves to reduce the water content of methanol solution from 2291 to 93 ppm.…”

Section: Introductionmentioning

confidence: 99%

“…Zhao et al 27 used 4A molecular sieves to reduce the water content of dimethyl carbonate from 40 to 3 mg/L, effectively ensuring the application of dimethyl carbonate as an electrolyte solvent. Hendriyana et al 28 used 3A molecular sieves to reduce the water content of methanol solution from 2291 to 93 ppm. It can be seen that A-type molecular sieves have great potential in the field of deep dehydration of organic solvents and can effectively remove water from solvents in a very low range.…”

Section: Introductionmentioning

confidence: 99%

Study on the Adsorption of Trace Water in N-Methyl-pyrrolidone Solvents by A-Type Molecular Sieves

Zhang,

He,

Wang

et al. 2024

ACS Omega

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N-Methyl-pyrrolidone (NMP) is an important coating solvent for the production of lithium batteries, and its water content will greatly affect the coating quality and energy density of lithium batteries, which needs to be reduced to 200 ppm. The current vacuum distillation technology suffers from high operating costs and high energy consumption, whereas the pervaporation technology only achieves solvent dehydration up to 99.5%. Therefore, it is of great significance to carry out the study of trace water removal from NMP solvents. In this paper, the A-type molecular sieve adsorption method was used to remove trace water from the NMP solvent, and the effects of molecular sieve type, particle size, adsorption temperature, feeding amount, and contact time on the dehydration performance of NMP system were first investigated. Adsorbed at 25 °C for 240 min at a feeding amount of 120 g/L, 3A molecular sieves were able to reduce the water content of the NMP solvent from 5000 to 140 ppm. Second, Langmuir and Freundlich equations were used to fit the static isothermal adsorption data, and the results showed a better correlation of the Langmuir equation. Then, the adsorption kinetics and diffusion mechanism were analyzed by the kinetic model and the Crank single-pore diffusion model. The R 2 of the pseudo-first-order kinetic model was 0.9993, which was more suitable for describing the process of adsorption of water from the NMP solvent by 3A molecular sieves, and the effective diffusion coefficient D e = 2.986 × 10 −8 cm 2 /s was calculated for the Crank single-pore adsorption model, which proved water molecules on the 3A molecular sieve. The diffusion of water molecules on the inner surface of the pores is the controlling step of the adsorption process. Finally, the fixedbed dynamic penetration curves were investigated to obtain the experimental data of fixed-bed adsorption, and the experimental data were fitted using the Thomas and Yoon−Nelson models, which showed that both models could describe the adsorption behavior of trace water in NMP solvents on 3A molecular sieves. This study provides a new idea for the removal of trace water in NMP systems, and a series of model fitting parameters provide basic data for industrial scale-up.

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“…The practice of adsorptive drying for liquid solvents is widespread in industry; however, the available scientific literature on this subject remains remarkably limited. Some studies have focused on drying nonpolar solvents such as toluene, benzene, or xylene using different adsorbents like zeolite 3A, zeolite 4A, and activated alumina. , Other studies have delved into the drying of alcohols on several adsorbents including zeolite 3A and 4A. − All of these investigations have primarily examined the equilibrium or kinetics of water adsorption while mostly disregarding the coadsorption of other components. Santos et al investigated the equilibrium and kinetics of the adsorptive drying of dimethyl carbonate on zeolite 3A under high-pressure conditions, revealing significant coadsorption of dimethyl carbonate within the adsorbent pores.…”

Section: Introductionmentioning

confidence: 99%

Adsorptive Drying of Liquid Mixtures Containing Formaldehyde, Methanol, Water, and Poly(oxymethylene) Dimethyl Ethers on Zeolite 3A

Ferre,

Zistler,

Burger

2024

Ind. Eng. Chem. Res.

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The separation of water from mixtures containing formaldehyde, methanol, water, and poly(oxymethylene) dimethyl ethers (OME) is a fundamental step in the water-tolerant OME 3−5 production processes. Several approaches have been discussed in the literature, including pervaporation, reactive distillation, and adsorption. This study focuses on the adsorption on zeolite 3A. Building on prior research, we extend an existing equilibrium adsorption model for systems containing formaldehyde + methanol + water to systems containing OME. Experimental data on breakthrough curves of formaldehyde, methanol, and water from a laboratory-scale column are presented. A comprehensive column model, encompassing chemical and adsorption equilibria, adsorption kinetics, and fluid dynamics, accurately predicts the breakthrough curves. The regeneration of the zeolite 3A is shown experimentally. A stream table for a water-tolerant OME 3−5 production process including adsorption is given, showing that water can be separated from mixtures containing formaldehyde, methanol, and OME with a high selectivity.

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Adsorption of water from methanol solution using various adsorbent

Cited by 4 publications

References 3 publications

Preparation of Carbon nitride/Carbon dots/4A molecular sieve composite and evaluation of adsorption performance for Methylene Blue

Preparation of Carbon nitride/Carbon dots/4A molecular sieve composite and evaluation of adsorption performance for Methylene Blue

Study on the Adsorption of Trace Water in N-Methyl-pyrrolidone Solvents by A-Type Molecular Sieves

Adsorptive Drying of Liquid Mixtures Containing Formaldehyde, Methanol, Water, and Poly(oxymethylene) Dimethyl Ethers on Zeolite 3A

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