Simulation and Analysis of Pressure Swing Adsorption Ethanol Drying Process by the Electrical Analogue

Guan, Jianyu; Hu, Xijun

doi:10.1142/9789812791924_0030

Cited by 3 publications

(4 citation statements)

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“…(3) Gas-solid heat transfer (4) Enthalpy of mixing is negligible (5) Include wall energy data (6) Heat of adsorption (7) Thermal conductivity of gas and thermal conductivity of solid (8) Compression (9) The system is fully mixed in the radial direction (10) Plug flow with axial dispersion occurs (11) The gas phase is ideal or nonideal (12) The driving force is based on a gas or solid film, and is either linear or quadratic (13) Gas phase pressure is either constant or the pressure varies according to a laminar or turbulent flow momentum balance (14) Mass transfer coefficients are either constant or vary with local conditions (15) Mass transfer is described using a lumped overall resistance, or by a model that accounts separately for micro-and macropore effects (16) Adsorption isotherms are either applicable for single or multicomponent adsorption…”

Section: Schematic and Modeling Of The Psa Processmentioning

confidence: 99%

“…For the ethanol-water mixture a type I adsorption isotherm is obtained, which is represented by the Langmuir model. This model proposes a constant temperature, localized adsorption only active sites, a homogeneous surface, and the adsorption occurs in a monolayer, assuming that each adsorption site can adhere to only one adsorbate molecule, the adsorption energy is the same for all adsorption sites and there is no interaction between the adsorbed molecules [10][11][12][13]. The thermodynamic equilibrium provides a measure of adsorption…”

Section: Bioethanol Purification By Psamentioning

confidence: 99%

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Review of the Pressure Swing Adsorption Process for the Production of Biofuels and Medical Oxygen: Separation and Purification Technology

Rumbo‐Morales

Torres

García

et al. 2022

Adsorption Science & Technology

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The production of biofuels has had a great impact on climate change and the reduction of the use of fossil fuels. There are different technologies used for the separation and production of biofuels, which allow having compounds such as ethanol, methane, oxygen, and hydrogen, one of these promising technologies is the Pressure Swing Adsorption process (PSA). The objectives of this article focus on the production and purification of compounds that achieve purities of 99.5% bioethanol, 94.85% biohydrogen, 95.00% medical oxygen, and 99.99% biomethane through the PSA process; also, a significant review is contemplated to identify the different natural and synthetic adsorbents that have greater adsorption capacity, the different configurations in which a PSA operates are studied and identified, and the different mathematical models that describe the dynamic behavior of all the variables are established that interact in this PSA process, parametric studies are carried out in order to identify the variables that have the greatest effect on the purity obtained. The results obtained in this review allow facilitating the calculation of parameters, the optimization of the process, the automatic control to manipulate certain variables and to achieve the rejection of disturbances to have a recovery and production of biofuels with a high degree of purity.

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Section: Schematic and Modeling Of The Psa Processmentioning

confidence: 99%

Section: Bioethanol Purification By Psamentioning

confidence: 99%

Review of the Pressure Swing Adsorption Process for the Production of Biofuels and Medical Oxygen: Separation and Purification Technology

Rumbo‐Morales

Torres

García

et al. 2022

Adsorption Science & Technology

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“…One of the most commonly employed processes for dehydration of gases is adsorption because of its high efficiency . Pressure swing adsorption (PSA) is one of the most widely used adsorption techniques for drying of alcohols and gases . PSA has advantages such as low‐cost operation, high product recovery, and operational simplicity .…”

Section: Introductionmentioning

confidence: 99%

Drying of nonpolar gas in a pressure swing adsorption process using canola meal biosorbents

Dhabhai

Mahaninia

Niu

et al. 2018

Asia-Pacific J Chem Eng

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Drying of gases is a very important industrial operation. In the present work, drying of nonpolar gas was carried out using nitrogen as a model gas, by selective adsorption of water vapor from the moist gas using canola meal (CM)‐based biosorbents in a pressure swing adsorption process. It was demonstrated that CM did not adsorb nonpolar nitrogen but selectively adsorbed polar water vapor. Five operating parameters—temperature, pressure, input feed water concentration, input gas concentration, and particle size—were chosen to study the nitrogen drying process using a fractional factorial design. Temperature and input water concentration had significant effects on the drying process, and the maximum water adsorption capacity obtained was 0.165 kg/kg.ads. The Dubinin–Polanyi (DP) model for large pores fit the water adsorption isotherms reasonably well and indicated that water adsorption is predominantly physisorption. Furthermore, site energy distribution of water adsorption based on the DP model was carried out to determine adsorbate–adsorbent interactions. It revealed that most of the adsorption sites were in the low‐energy region of the distribution (>7,800 J/mol) and there were negligible sites with energy higher than 25,000 J/mol which again confirms that water adsorption is rapid, reversible, and low‐energy process, which is the characteristic of physisorption. The average energy and standard deviation of the site energy distribution was 5,000 J/mol. Saturated biosorbent was regenerated at 110°C and reused multiple times. The analysis of the present work can be applied to similar systems for drying of nonpolar gases.

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“…Since a large amount of energy is needed to overcome the ethanol−water azeotrope, various separation techniques have been examined to replace the more energy-intensive methods such as the azeotropic distillation. One of these techniques is adsorption where water is preferentially removed from the final distillate to bring its concentration to above 99% purity. − Another section of the process that could greatly enhance the economic viability of ethanol is to find a way to increase the ethanol yield in the fermenter. By partially removing ethanol from the fermentation broth, it would be possible to reduce the toxicity of the fermentation broth and therefore allow microorganisms to convert an increased quantity of sugars.…”

Section: Introductionmentioning

confidence: 99%

Recovery of Ethanol from Carbon Dioxide Stripped Vapor Mixture: Adsorption Prediction and Modeling

Hashi

Thibault

Tezel

2010

Ind. Eng. Chem. Res.

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Carbon dioxide stripping of ethanol and adsorption can be used in a bioethanol fermentation system to reduce product inhibition. To gain a better understanding of the bioethanol adsorption process, a mathematical model was used to predict the adsorption performance of activated carbon WV-B 1500 for ethanol vapor adsorption in the presence of carbon dioxide and water. The model takes into account changes in velocity due to adsorption, heat effects during adsorption, and heat losses to the surroundings. The model, developed without resorting to fitting parameters, was validated successfully by comparing the model predictions with experimental adsorption data. Finally, the model was used to predict the adsorption working capacities to assess the performance of the adsorption process in an industrial process.

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Simulation and Analysis of Pressure Swing Adsorption Ethanol Drying Process by the Electrical Analogue

Cited by 3 publications

References 0 publications

Review of the Pressure Swing Adsorption Process for the Production of Biofuels and Medical Oxygen: Separation and Purification Technology

Review of the Pressure Swing Adsorption Process for the Production of Biofuels and Medical Oxygen: Separation and Purification Technology

Drying of nonpolar gas in a pressure swing adsorption process using canola meal biosorbents

Recovery of Ethanol from Carbon Dioxide Stripped Vapor Mixture: Adsorption Prediction and Modeling

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