Analysis of gas dehydration in TSA system with multi-layered bed of solid adsorbents

Nastaj, J.; Ambrożek, B.

doi:10.1016/j.cep.2015.08.001

Cited by 34 publications

(18 citation statements)

References 38 publications

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“…[5,7] There are different methods for dehydration of natural gas in commercial applications, among which the most frequent are adsorption, compression, condensation, and glycol treatment. [8][9][10][11][12][13] Dehydration of natural gas to a certain level has great importance, especially when it comes to more gas processes or liquefaction at low temperatures. [14] The adsorption process using commercial zeolite molecular sieves, silica gel, and activated alumina is known as the best method of natural gas dehydration.…”

Section: Introductionmentioning

confidence: 99%

Performance optimization of an industrial natural gas dehydration process to reduce energy consumption and greenhouse gases (GHGs) emission

2021

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Section: Introductionmentioning

confidence: 99%

Performance optimization of an industrial natural gas dehydration process to reduce energy consumption and greenhouse gases (GHGs) emission

2021

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“…An adsorptive drying process has long been employed for drying of gases or liquids [1][2][3][4][5], as it can occupy small footprint and operate continuously thanks to the regenerative nature of a desiccant owning a large drying capacity. A dry air produced by adsorptive drying has been widely used in food and pharmaceutical industries as well as gas processing industry [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Among them, it is known that a Thermal Swing Adsorption (TSA) process with the column regenerated externally by a hot dry air is capable of producing a dry air at extremely low dew points, often below -70 °C. This is because regenerating the column with a hot dry air ensures the adsorption column being regenerated very rigorously, enabling to produce a very low dew point air in the next adsorption run [3,4,10].…”

Section: Introductionmentioning

confidence: 99%

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Equilibrium theory analysis of thermal regeneration of a humid adsorption column: Selection of optimal hot purge gas temperature

Ahn

2019

Chemical Engineering Research and Design

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A Thermal Swing Adsorption (TSA) process has been widely commercialised for its application to air drying. In designing an air-drying TSA, zeolite 13X is chosen as a desiccant when required to produce a very low dew point dry air due to its highly nonlinear, favourable isotherm. It is essential to make use of an external hot purge gas in producing such an extremely low dew point dry air, as the column has to be regenerated thoroughly for the next adsorption step. In case of the externally heated TSA, usage of a hot purge gas gives rise to huge energy consumption. Also the cycle time has to be made as short as possible to enhance the bed productivity. To optimise this energy-intensive process, it is crucial to find an optimal hot purge gas temperature at which the column can be regenerated as quickly as possible with less energy *Manuscript Click here to view linked References consumed. In this study, Equilibrium Theory approach was taken to analyse the thermal regeneration breakthrough of a zeolite 13X column saturated with a water vapour in which the equilibrium isotherm is estimated by Toth or Aranovich-Donohue isotherms. As a result of Equilibrium Theory analysis, it was found that the trailing front of a thermal regeneration breakthrough would exhibit a transition of the shape from simple wave to shock wave with increasing purge gas temperature. The purge gas temperature has to be chosen so that after thermal regeneration the targeted water vapour concentration remaining in the column lies within the concentration range occupied by the shock wave. A useful correlation that relates the targeted dew point of the remaining water vapour with the purge gas temperature was proposed. The presence of the optimal hot purge gas temperature estimated by Equilibrium Theory was validated by both full numerical simulation and ideal work consumption.

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“…A study on using a mixed fixed bed of silica gel, zeolites, and activated carbon for dehydration of gas streams was presented by Nastaj et al [8]. Steffan et al [9,10] investigated the adsorption behavior of cyclic and chained hydrocarbons on silica gel in nitrogen carrier gas.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Cyclic Hydrocarbons on Silica Alumina Gels in Natural Gas Processing

Berg

Pasel

Luckas

et al. 2017

Chemie Ingenieur Technik

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To ensure the technical use of natural gas it is necessary to remove heavy (cyclic) hydrocarbons from the crude gas. In this article the adsorption of two cyclic hydrocarbons in a N 2 -carrier gas is investigated on two commercial silica alumina gels. Adsorption isotherms are determined from cumulative breakthrough experiments in a fixed-bed adsorber. The isosteric heat of adsorption is calculated from the temperature-dependent isotherms. The experimental data is discussed regarding the molecular structure of the adsorptive agents as well as surface chemistry and pore structure of the adsorbents.

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Analysis of gas dehydration in TSA system with multi-layered bed of solid adsorbents

Cited by 34 publications

References 38 publications

Performance optimization of an industrial natural gas dehydration process to reduce energy consumption and greenhouse gases (GHGs) emission

Performance optimization of an industrial natural gas dehydration process to reduce energy consumption and greenhouse gases (GHGs) emission

Equilibrium theory analysis of thermal regeneration of a humid adsorption column: Selection of optimal hot purge gas temperature

Adsorption of Cyclic Hydrocarbons on Silica Alumina Gels in Natural Gas Processing

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