Aspen adsorption simulation for the effects of purge flow rate and vacuum pressure in vacuum pressure swing adsorption

Punpee, Sirawich; Phalakornkule, Chantaraporn

doi:10.1016/j.matpr.2021.10.442

Cited by 5 publications

(4 citation statements)

References 13 publications

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“…One of both was offered by pressure difference, which was the gradually decreased CO 2 partial pressure in the mixture gas (CH 4 &CO 2 ). Another was the activation energy offered to the adsorbed CO 2 , which was due to the collision between purge CH 4 molecules and CO 2 molecules [18]. It suggested that the choice of purge flowrates would be more important issue than purge time for PSA.…”

Section: Purge Regenerationmentioning

confidence: 99%

Experiment investigation of CO₂ regeneration properties for JLOX500 and 13X in various ways

Sun,

Tang,

Sun

et al. 2024

J. Phys.: Conf. Ser.

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This work presented a comparative study of CO2 regeneration for two kinds of X zeolites (JLOX500 and 13X) in different ways, such as vacuum, CH4 purge and heating regeneration. The materials characteristics of samples were determined by EDS and BET. The adsorption capacities of CO2 for original and regenerated samples were identified as the single-point adsorption dosing CO2 at 800 kPa. The results showed that JLOX500 had larger original adsorption capacity (OAC) of CO2 (4.83 mmol/g) than that of 13X (4.10 mmol/g). In vacuum regeneration, the regenerated adsorption capacities (RAC) of CO2 for both samples were almost same at all vacuum pressures (1 ~ 100 kPa); in CH4 purge regeneration, the regeneration degree (RD) for both samples were identical to each other with the flowrates (50 ~ 300 mL/min); in heating regeneration, JLOX500 had larger RACs than 13X at temperatures (50 ~ 300 °C), but had less RDs. The RACs and RDs for JLOX500 and 13X both increased as the regeneration time was prolonged. 13X would be more efficient adsorbent in the vacuum regeneration, whereas JLOX500 performed better in purge and heating regeneration.

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Section: Purge Regenerationmentioning

confidence: 99%

Experiment investigation of CO₂ regeneration properties for JLOX500 and 13X in various ways

Sun,

Tang,

Sun

et al. 2024

J. Phys.: Conf. Ser.

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“…When purging gas blow over adsorbents surface in column, the gas reduces partial pressure of CO2 in column, which makes CO2 run away from adsorbents under the pressure gradient. Meanwhile, sufficient energy is provided for adsorbed CO2 to escape from narrow holes of adsorbents (Punpee and Phalakornkule, 2021). At the beginning, adsorbents in column is in CO2 saturation state, CO2 with weaker surface binding force or squeezing into large and medium pores can run away from adsorbents easily once the pressure gradient is produced.…”

Section: Co2 Desorption Performance Via Ch4 Purgingmentioning

confidence: 99%

“…(Santos et al, 2011) found increasing purging time improved product purity. (Punpee and Phalakornkule, 2021) investigated effects of N2 purging speed on 13X and 5A regeneration efficiency. Results showed CO2 adsorbed amount and desorption rate on 13X were higher than that on 5A.…”

Section: Introductionmentioning

confidence: 99%

CO 2 desorption characteristics on zeolite-A, X and CMS under different regeneration conditions

Tang,

Wen,

Zhang

et al. 2024

Preprint

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The desorption characteristics of CO2 are directly related to the time allocation and tower size design during adsorption process, but there is a lack of studies on CO2 desorption characteristics of on molecular sieves under different regeneration conditions. In order to analyze the factors (adsorbents and operation conditions) influence CO2 desorption efficiency and explore adsorbents regeneration characteristics, combining with adsorbents framework structure, this article tracked performance of CO2 desorption on zeolite-A, X and CMS-240 under different heating temperature, purging speed and vacuum pressure. It was found that CMS-240 without crystal structure could realize ideal CO2 desorption performance under all regeneration conditions. And for 13X, 5A and 4A molecular sieves with octahedral structure, better regeneration effect could be realized under heating conditions and vacuum 100 KPa, pore-network size contributes more than cation type and position during this process. Besides, for purging regeneration process, the total amount of blowing gas determines adsorbent regeneration rate rather than a single factor of time or gas velocity.

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“…Punpee S et al [19] used Aspen Adsorption to explore the optimal purge flow tare and vacuum pressure for VPSA. Makarem et al [20] conducted an experimental and theoretical study of the VPSA oxygen generation process. The effects of adsorption time and purge pressure on oxygen recovery and purity were explored.…”

Section: Introductionmentioning

confidence: 99%

Plateau-Adapted Single-Pump, Single-Bed Vacuum Pressure Swing Adsorption Oxygen Generation Process Simulation and Optimization

Zhang,

Li,

Song

et al. 2024

Processes

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To enhance the oxygen guarantee capacity in high altitude areas and address the challenges of traditional pressure swing adsorption oxygen generation fixed equipment with large volume and multiple device modules, a novel single-reversible-pump single-bed vacuum pressure swing adsorption (VPSA) oxygen generation process was proposed and simulated. This study investigated the effects of purge on oxygen productivity, purity, recovery, and energy consumption, determining that the optimum ratio of total oxygen in the purge gas to the total oxygen in the feed gas (P/F) was 0.176. A set of principle prototypes was developed and validated in plains. The process performance was then simulated and studied at altitudes of 3000 m, 4000 m, and 5000 m. Finally, the optimization was carried out by adjusting the product flow rate and feed flow rate, revealing that the best performance can be achieved when the oxygen purity exceeded 90% with lower energy consumption or larger productivity than the optimization goal. This study serves as a valuable reference for the optimization of the VPSA oxygen generation process in a plateau environment.

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Aspen adsorption simulation for the effects of purge flow rate and vacuum pressure in vacuum pressure swing adsorption

Cited by 5 publications

References 13 publications

Experiment investigation of CO₂ regeneration properties for JLOX500 and 13X in various ways

Experiment investigation of CO₂ regeneration properties for JLOX500 and 13X in various ways

CO 2 desorption characteristics on zeolite-A, X and CMS under different regeneration conditions

Plateau-Adapted Single-Pump, Single-Bed Vacuum Pressure Swing Adsorption Oxygen Generation Process Simulation and Optimization

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Aspen adsorption simulation for the effects of purge flow rate and vacuum pressure in vacuum pressure swing adsorption

Cited by 5 publications

References 13 publications

Experiment investigation of CO2 regeneration properties for JLOX500 and 13X in various ways

Experiment investigation of CO2 regeneration properties for JLOX500 and 13X in various ways

CO 2 desorption characteristics on zeolite-A, X and CMS under different regeneration conditions

Plateau-Adapted Single-Pump, Single-Bed Vacuum Pressure Swing Adsorption Oxygen Generation Process Simulation and Optimization

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Product

Resources

About

Experiment investigation of CO₂ regeneration properties for JLOX500 and 13X in various ways

Experiment investigation of CO₂ regeneration properties for JLOX500 and 13X in various ways