Experimental study on the adsorptive-distillation for dehydration of ethanol-water mixture using natural and synthetic zeolites

Megawati, Megawati; Wicaksono, Denny Kristianto; Abdullah, Mohd Sohaimi

doi:10.1063/1.4976896

Cited by 4 publications

(5 citation statements)

References 20 publications

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“…Therefore, it is difficult to recycle ethanol when using mixed solvents. To obtain pure ethanol for reuse, the ternary system technique required a substantial quantity of energy [ 37 , 38 ]. Previous studies reported that sequential extractions (from nonpolar to polar solvents) can improve the extraction efficiency and uncovering of widely phytochemical compounds and bioactivity [ 39 , 40 ].…”

Section: Resultsmentioning

confidence: 99%

Influence of Different Extraction Methods on the Changes in Bioactive Compound Composition and Antioxidant Properties of Solid-State Fermented Coffee Husk Extracts

Jiamjariyatam,

Phucharoenrak,

Samosorn

et al. 2023

The Scientific World Journal

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In brewing coffee, a huge amount of food waste is generated; that waste, coffee husks in particular, should be comprehensively exploited. They offer a rich source of bioactive compounds such as caffeine, chlorogenic acid, and trigonelline. The aim of this study was to investigate the effects of extraction methods on the bioactive compounds and antioxidant activity of such waste. Coffee husks in this study were fermented with S. cerevisiae based on a solid-state fermentation technique. The study method included ethanolic or water extraction with varied controllable factors, i.e., temperature (60, 100°C) and extraction technique. Bioactive contents were investigated with the Folin–Ciocalteu assay and 1H-NMR spectroscopy. The antioxidant activity was investigated with DPPH and FRAP assays. Results show that yields were the highest in the extract of fermented coffee husks at 100°C. The highest levels of bioactive contents (total trigonelline content at 3.59% and antioxidant activity at 23.35% (DPPH) and 25.9% (FRAP)) were found in the ethanolic extract of fermented coffee husks at 60°C. The bioactive content and bioactivity, including antioxidant activity, depended on different raw materials, preparation methods, and extraction conditions. This study illustrates the potential for using food waste such as coffee husks as a sustainable source of bioactive compounds or bioactive extracts.

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Section: Resultsmentioning

confidence: 99%

Influence of Different Extraction Methods on the Changes in Bioactive Compound Composition and Antioxidant Properties of Solid-State Fermented Coffee Husk Extracts

Jiamjariyatam,

Phucharoenrak,

Samosorn

et al. 2023

The Scientific World Journal

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“…Subsequently, if the initial ethanol concentration is close to the azeotrope point (near 96.5% v/v), the ethanol concentration produced from these experiments could achieve almost anhydrous ethanol. 16 Therefore, natural and synthetic zeolites are considered as promising adsorbents of water vapour in AD system.…”

Section: Resultsmentioning

confidence: 99%

“…[13][14][15] The latter workers used inorganic adsorbents such as molecular sieves, lithium chloride, silica gel and activated alumina. 4,9,14,16,17 In addition, synthetic zeolites 3Å is better than natural ones for removing and purifying ethanol from an ethanol-water mixture in gas phase. 16 The focus of this research is to study the quantitative modelling of adsorptive-distillation of ethanol-water solution using natural and synthetic zeolites as adsorbent.…”

Section: Introductionmentioning

confidence: 99%

Modelling of Adsorptive-distillation of Ethanol-water Using Natural and Synthetic Zeolites as Adsorbent

Rengga¹,

Fardhyanti²,

Akhir³

et al. 2018

JPS

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To cite this article: Megawati et al. (2018). Modelling of adsorptive-distillation of ethanolwater using natural and synthetic zeolites as adsorbent. ABSTRACT:The purpose of this research is to study the modeling of adsorptivedistillation (AD) on ethanol-water mixture purification using natural and synthetic zeolites as adsorbent. The synthetic zeolite type used was zeolite 3A. AD is an effective way to purify ethanol-water mixture so that it can produce pure ethanol as fuel. Natural and synthetic zeolites as adsorbent are quite promising for industrial application. The experiment was conducted in a batch operation. Four AD modellings are developed based on four different simplifications, i.e., quasi-steady-state with no axial dispersion (Model 1), unsteady-state with no axial dispersion (Model 2), quasi-steady-state with axial dispersion (Model 3) and unsteady-state with axial dispersion (Model 4). The equilibrium equation correlating water content in vapour and water content in adsorbent particle was approximated by Henry's law model.

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“…Even the extraction process is also not possible to achieve 100% ethanol. In the present process, adsorption process gives maximum purity of ethanol [1, 2].…”

Section: Introductionmentioning

confidence: 99%

“…The extractive distillation and azeotropic distillation techniques can be used for the production of anhydrous ethanol. But these methods have the problems of organic impurities which yield huge investment and high energy requirement with low production rate [1, 2]. The more volatile components will remove by drying first, then as per the boiling points, the remaining components will remove.…”

Section: Introductionmentioning

confidence: 99%

Water Removal from an Ethanol-Water Mixture at Azeotropic Condition by Adsorption Technique

Mekala¹,

Neerudi²,

Are³

et al. 2022

Adsorption Science & Technology

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The separation of ethanol-water mixture is employed in the present work to produce pure ethanol, the present investigation on the separation of water from the ethanol to achieve pure ethanol by adsorption process. The different parameters like quantity of adsorbent, flow rate of feed mixture, and different adsorbents which are zeolite 3A, zeolite 4A, and silica gel are selected to study purification of ethanol by adsorption. The effect of process parameter for purification is also recorded and studied to evaluate the performance of adsorption equipment and adsorbent. The experiments are conducted at 30°C. The feed mixture is 95.6% (v/v) concentration of ethanol and 4.4% (v/v) of water. The designed adsorption column is suitable for purification of ethanol. The highest ethanol concentration 99.9443% obtained at 20 ml/min flow rate of feed mixture using 50 g of zeolite.

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Experimental study on the adsorptive-distillation for dehydration of ethanol-water mixture using natural and synthetic zeolites

Cited by 4 publications

References 20 publications

Influence of Different Extraction Methods on the Changes in Bioactive Compound Composition and Antioxidant Properties of Solid-State Fermented Coffee Husk Extracts

Influence of Different Extraction Methods on the Changes in Bioactive Compound Composition and Antioxidant Properties of Solid-State Fermented Coffee Husk Extracts

Modelling of Adsorptive-distillation of Ethanol-water Using Natural and Synthetic Zeolites as Adsorbent

Water Removal from an Ethanol-Water Mixture at Azeotropic Condition by Adsorption Technique

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