Application of ultrasound in regeneration of silica gel for industrial gas drying processes

Daghooghi-Mobarakeh, Hooman; Miner, Mark; Wang, Liping; Wang, Robert; Phelan, Patrick E.

doi:10.1080/07373937.2021.1929296

Cited by 9 publications

(3 citation statements)

References 50 publications

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“…The short adsorption-desorption cycles and lowtemperature regeneration techniques are employed that can help achieve low operational costs [22]. Adsorption drying has several disadvantages, including increased heating costs, energy-intensive regeneration processes, and potential sorbent abrasion [9], [21]. Various approaches have been proposed to improve the limitations of estimating drying capacity to achieve optimal drying performance.…”

Section: Related Workmentioning

confidence: 99%

Drier Bed Adsorption Predictive Model with Enhancement of Long Short-Term Memory and Particle Swarm Optimization

Yusoff,

Sallehud-din,

Tahir

et al. 2023

IJACSA

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The drier bed adsorption processes remove moisture from gases and liquids by ensuring product quality, extending equipment lifespan, and enhancing safety in various applications. The longevity of adsorption beds is quantified by net loading capacity values that directly impact the effectiveness of the moisture removal process. Predictive modeling has emerged as a valuable tool to enhance drier bed adsorption systems. Despite the increasing significance of predictive modeling in enhancing the efficiency of drier bed adsorption processes, the existing methodologies frequently exhibit deficiencies in accuracy and flexibility, which are crucial for optimizing process performance. This research investigates the effectiveness of a hybrid approach combining Long Short-Term Memory and Particle Swarm Optimization (LSTM+PSO) as a proposed method to predict the net loading capacity of a drier bed. The train-test split ratios and rolling origin technique are explored to assess model performance. The findings reveal that LSTM+PSO with a 70:30 train-test split ratio outperform other methods with the lowest error. Bed 1 exhibits an RMSE of 1.31 and an MSE of 0.91, while Bed 2 archives RMSE and MSE values of 0.81 and 0.72, respectively and Bed 3 with an RMSE of 0.19 and an MSE of 0.13, followed by Bed 4 with an RMSE of 0.67 and an MSE of 0.36. Bed 5 exhibits an RMSE of 0.42 and an MSE of 0.34. Furthermore, this research compares LSTM+PSO with LSTM and conventional predictive methods: Support Vector Regression, Seasonal Autoregressive Integrated Moving Average with Exogenous Variables, and Random Forest.

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Section: Related Workmentioning

confidence: 99%

Drier Bed Adsorption Predictive Model with Enhancement of Long Short-Term Memory and Particle Swarm Optimization

Yusoff,

Sallehud-din,

Tahir

et al. 2023

IJACSA

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“…Ventilated packed beds of hygroscopic porous media constitute a central component of several industrial processes. For example, they are used to dry compressed air (Daghooghi-Mobarakeh et al 2022). Because they can be regenerated using low-grade heat, they form components of environmentally sustainable systems.…”

Section: Introductionmentioning

confidence: 99%

Heat and Mass Transfer in Hygroscopic Porous Media: Consequences of Invoking Tóth’s Sorption Isotherm

Thorpe

2023

Transp Porous Med

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The thermal performance of ventilated beds of hygroscopic porous media depends strongly on the sorption properties of the solid phase. Furthermore, the published literature shows that the predicted performance of ventilated beds of hygroscopic porous media is extremely sensitive to the form and accuracy of the sorption isotherm. This is particularly apparent under idealized conditions when thermodynamic equilibrium is deemed to exist between the solid and fluid phases. When Tóth’s isotherm is invoked in an equilibrium model used to analyse the performance of a bed of initially warm and dry silica gel ventilated with cool, humid air, it is predicted that a shock wave develops downstream of air entering the bed. In contrast, it is shown that non-equilibrium solutions result in a transfer wave, the width of which decreases as the velocity of the interstitial air decreases. The Tóth isotherm gives rise to erroneous values of the integral heat of wetting of silica gel. Previously published studies of simultaneous heat and mass transfer in beds of hygroscopic materials refer to conceptual difficulties in interpreting the results, and some published mathematical analyses are somewhat terse. A secondary aim of this work is to assuage these difficulties by detailing the analyses in Supplementary Information.

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“…Ultrasonic (US) influence [1][2][3][4] is becoming more and more widespread for intensification of technological processes. In the course of numerous scientific studies, as well as on examples of successful commercial implementation of ultrasonic equipment [5,6], the high efficiency of high intensity ultrasound has been repeatedly confirmed in the initiation of the flow and intensification of technological processes in substances in various aggregate states [7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Design of process equipment exposure sources for ultrasonic absorption of greenhouse gases

Khmelev,

Golykh,

Tsyganok

et al. 2023

E3S Web Conf.

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The work aims at improving the efficiency of greenhouse gas utilisation processes, namely carbon dioxide. The principle of operation of the designed equipment is to realise the process of ultrasonic absorption (absorption of gas by liquid) when carbon dioxide is fed over the surface of the liquid, in which cavitation occurs. The source of the cavitation action is a plate that oscillates with a given frequency and amplitude. The efficiency of the ultrasonic gas absorption process is determined by the parameters of plate oscillations. In particular, to ensure the necessary and sufficient amplitude of plate oscillations and uniformity of its distribution along the plate, it is proposed to solve the problem of optimal placement of the required number of ultrasonic emitters of a given size. As a criterion of optimality, it is proposed to use the integral power of oscillations of the whole plate, formed by a certain number of emitters. The proposed and developed numerical model of oscillation formation in the plate is based on the solution of the biharmonic equation for the distribution of amplitudes of oscillations, taking into account the finiteness of its thickness and provides the choice of the number, location, and size of ultrasonic emitters required to solve a particular problem. The simulation results allowed us to establish that the optimal location of the emitters depends on specific characteristics that must be taken into account when solving the problem of optimising the size and location of ultrasonic emitters for each particular plate. The calculations showed high efficiency of the created model and the possibility of its practical application for solving the problems of utilisation of greenhouse gas emissions in agriculture.

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Application of ultrasound in regeneration of silica gel for industrial gas drying processes

Cited by 9 publications

References 50 publications

Drier Bed Adsorption Predictive Model with Enhancement of Long Short-Term Memory and Particle Swarm Optimization

Drier Bed Adsorption Predictive Model with Enhancement of Long Short-Term Memory and Particle Swarm Optimization

Heat and Mass Transfer in Hygroscopic Porous Media: Consequences of Invoking Tóth’s Sorption Isotherm

Design of process equipment exposure sources for ultrasonic absorption of greenhouse gases

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