Adsorptive Water Removal from Primary Alcohols and Acetic Acid Esters in the ppm-Region

Pahl, C.; Pasel, Christoph; Luckas, Michael; Bathen, Dieter

doi:10.1021/je3005694

Cited by 12 publications

(6 citation statements)

References 12 publications

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“…These results are in accordance with the findings of adsorptive drying of higher alcohols (>C4) and esters. 7 , 8 According to Basmadjian, 2 if solvent molecules cannot penetrate the pores of the molecular sieves, the water adsorption isotherm is independent of the solvent and is the same as a pure water vapor isotherm.…”

Section: Resultsmentioning

confidence: 99%

“…Adsorption is one of the possible methods for obtaining ultrapure solvents. 2 Because of their high hygroscopicity, molecular sieves have already demonstrated their adsorption capability for the drying of ethanol, 3 , 4 higher alcohols 5 , 6 and esters, 7 , 8 toluene, 9 and other hydrocarbons 10 and solvents. 11 The general conclusion is that hydrophobic solvents are easier to dry.…”

Section: Introductionmentioning

confidence: 99%

“…Adsorption is one of the possible methods for obtaining ultrapure solvents . Because of their high hygroscopicity, molecular sieves have already demonstrated their adsorption capability for the drying of ethanol, , higher alcohols , and esters, , toluene, and other hydrocarbons and solvents . The general conclusion is that hydrophobic solvents are easier to dry. , For water removal from solvents that cannot penetrate the micropores of the zeolite, the adsorption equilibrium is the same as the pure water vapor isotherm .…”

Section: Introductionmentioning

confidence: 99%

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Adsorptive Water Removal from Dichloromethane and Vapor-Phase Regeneration of a Molecular Sieve 3A Packed Bed

Jović

Laxminarayan

Keurentjes

et al. 2017

Ind. Eng. Chem. Res.

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The drying of dichloromethane with a molecular sieve 3A packed bed process is modeled and experimentally verified. In the process, the dichloromethane is dried in the liquid phase and the adsorbent is regenerated by water desorption with dried dichloromethane product in the vapor phase. Adsorption equilibrium experiments show that dichloromethane does not compete with water adsorption, because of size exclusion; the pure water vapor isotherm from literature provides an accurate representation of the experiments. The breakthrough curves are adequately described by a mathematical model that includes external mass transfer, pore diffusion, and surface diffusion. During the desorption step, the main heat transfer mechanism is the condensation of the superheated dichloromethane vapor. The regeneration time is shortened significantly by external bed heating. Cyclic steady-state experiments demonstrate the feasibility of this novel, zero-emission drying process.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adsorptive Water Removal from Dichloromethane and Vapor-Phase Regeneration of a Molecular Sieve 3A Packed Bed

Jović

Laxminarayan

Keurentjes

et al. 2017

Ind. Eng. Chem. Res.

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“…They conducted preliminary batch equilibrium experiments in the system (formaldehyde + methanol + water + OME) on zeolite 3A, assuming exclusive water adsorption. However, due to size considerations, the coadsorption of particularly formaldehyde and methanol cannot be excluded. − …”

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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“…Recently some researcher reported that bio-based desiccants adsorb water up to 4.5% by weight from alcohol water mixture. They concluded that, uptake capacity of water in vapor form is higher than that of liquid for effective adsorption 17,18 . In this present work the optimization of various parameters like silica gel weight, Hot air temperature and molar ratio for response of energy consumption in a microcontroller based embedded system for esterification of acetic acid and nbutanol is studied.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Energy Consumption in Acetic Acid and N-Butanol Esterification Reaction with Simultaneous Water Removal Using Novel Microcontroller Based Automated Reactor

Bhusari

Mazumdar

Rathod

2020

Chem. Eng. Res. Bull.

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This paper focuses on the optimization of energy consumption in esterification of acetic acid wherein the water removal is achieved by using silica gel desiccant in a microcontroller based automated reactor. Esterification reactions are endothermic hence, one can get more product, by increasing the temperature, thus disturbing the equilibrium. Heat of reaction (Hr) was estimated by using the heat capacity data and constants (C). Energy analysis and modelling was developed for the enhancement of process which is the key component of the systems. The mathematical model is validated by experimental results. In this paper, effect of parameters like desiccant weight, regeneration temperature and molar ratio on energy consumption are studied. Trends of energy effectiveness of several parameters are presented in the various regeneration temperatures and molar ratio and desiccant weight which confirmed the linear relationship with hot air flowrate. Decrease of 33% in power consumption was observed by decreasing the hot air flowrate by 10%.This is the conformity of validation of affinity law. The newly invented model was optimized for variables, hot air temperature, molar ratio and silica gel weight. The minimum energy consumption at 1 desirability was reported by software in the given range of parameters. When the hot air temperature, molar ratio and silica gel weight were 67.670C, 3 and 34.32 gm, then the minimum value of energy consumption was 29.59 Watt. Chemical Engineering Research Bulletin 21(2019) 46-57

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Adsorptive Water Removal from Primary Alcohols and Acetic Acid Esters in the ppm-Region

Cited by 12 publications

References 12 publications

Adsorptive Water Removal from Dichloromethane and Vapor-Phase Regeneration of a Molecular Sieve 3A Packed Bed

Adsorptive Water Removal from Dichloromethane and Vapor-Phase Regeneration of a Molecular Sieve 3A Packed Bed

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

Optimization of Energy Consumption in Acetic Acid and N-Butanol Esterification Reaction with Simultaneous Water Removal Using Novel Microcontroller Based Automated Reactor

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