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Performance comparison of ultrasonic-assisted and magnetic stirred absorption methods for CO2 separation

Chemical absorption is the most matured and preferred separation process which is extensively used for CO2 removal from natural gas. The current contactor systems used in the absorption process suffer from several drawbacks including excessive footprint, operating, and maintenance issues. Ultrasonic...

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Main Authors: Shokrollahi, F., Lau, K.K., Tay, W.H.
Format: Article
Published: Springer Nature 2020
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85100782153&doi=10.1007%2fs42452-020-3012-9&partnerID=40&md5=cc69826207aded055d1dc3642d1a45bf
http://eprints.utp.edu.my/23130/
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spelling my.utp.eprints.231302021-08-19T05:35:54Z Performance comparison of ultrasonic-assisted and magnetic stirred absorption methods for CO2 separation Shokrollahi, F. Lau, K.K. Tay, W.H. Chemical absorption is the most matured and preferred separation process which is extensively used for CO2 removal from natural gas. The current contactor systems used in the absorption process suffer from several drawbacks including excessive footprint, operating, and maintenance issues. Ultrasonic irradiation is a new alternative technique to assist the CO2 absorption process without the aforementioned limitations. Thus, the aim of this paper is elucidating the potential of the ultrasonic-assisted CO2 absorption system. To achieve this, the performance of the ultrasonic-assisted system was compared to that of the conventional stirring method. Two different solvents with dissimilar reaction mechanisms were chosen. The first part of the experiments was conducted in the ultrasonic-assisted batch vessel, while the second part was accomplished in the stirred batch cell. The parameters including ultrasonic power, ultrasonic frequency, stirring speed, and initial feed pressure were 18 W, 1.7 MHz, 500 rpm, and 11 bar, respectively. Besides, the operating temperature and the concentration were chosen based on the standard operating condition for each solvent. The mass transfer coefficient was calculated using the dynamic pressure-step method. The results revealed that in comparison with the stirring method, the ultrasonic-assisted absorption system significantly enhanced the CO2 absorption process at similar operating conditions. By using ultrasonic irradiation, the volumetric absorption coefficient increased almost three times for MDEA and nearly six times for MEA. In the latter, this improvement can be related to the physical effect of the ultrasound. However, for the slow kinetic solvents, this improvement might be attributed to the chemical effect of the ultrasound. © 2020, Springer Nature Switzerland AG. Springer Nature 2020 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85100782153&doi=10.1007%2fs42452-020-3012-9&partnerID=40&md5=cc69826207aded055d1dc3642d1a45bf Shokrollahi, F. and Lau, K.K. and Tay, W.H. (2020) Performance comparison of ultrasonic-assisted and magnetic stirred absorption methods for CO2 separation. SN Applied Sciences, 2 (7). http://eprints.utp.edu.my/23130/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description Chemical absorption is the most matured and preferred separation process which is extensively used for CO2 removal from natural gas. The current contactor systems used in the absorption process suffer from several drawbacks including excessive footprint, operating, and maintenance issues. Ultrasonic irradiation is a new alternative technique to assist the CO2 absorption process without the aforementioned limitations. Thus, the aim of this paper is elucidating the potential of the ultrasonic-assisted CO2 absorption system. To achieve this, the performance of the ultrasonic-assisted system was compared to that of the conventional stirring method. Two different solvents with dissimilar reaction mechanisms were chosen. The first part of the experiments was conducted in the ultrasonic-assisted batch vessel, while the second part was accomplished in the stirred batch cell. The parameters including ultrasonic power, ultrasonic frequency, stirring speed, and initial feed pressure were 18 W, 1.7 MHz, 500 rpm, and 11 bar, respectively. Besides, the operating temperature and the concentration were chosen based on the standard operating condition for each solvent. The mass transfer coefficient was calculated using the dynamic pressure-step method. The results revealed that in comparison with the stirring method, the ultrasonic-assisted absorption system significantly enhanced the CO2 absorption process at similar operating conditions. By using ultrasonic irradiation, the volumetric absorption coefficient increased almost three times for MDEA and nearly six times for MEA. In the latter, this improvement can be related to the physical effect of the ultrasound. However, for the slow kinetic solvents, this improvement might be attributed to the chemical effect of the ultrasound. © 2020, Springer Nature Switzerland AG.
format Article
author Shokrollahi, F.
Lau, K.K.
Tay, W.H.
spellingShingle Shokrollahi, F.
Lau, K.K.
Tay, W.H.
Performance comparison of ultrasonic-assisted and magnetic stirred absorption methods for CO2 separation
author_facet Shokrollahi, F.
Lau, K.K.
Tay, W.H.
author_sort Shokrollahi, F.
title Performance comparison of ultrasonic-assisted and magnetic stirred absorption methods for CO2 separation
title_short Performance comparison of ultrasonic-assisted and magnetic stirred absorption methods for CO2 separation
title_full Performance comparison of ultrasonic-assisted and magnetic stirred absorption methods for CO2 separation
title_fullStr Performance comparison of ultrasonic-assisted and magnetic stirred absorption methods for CO2 separation
title_full_unstemmed Performance comparison of ultrasonic-assisted and magnetic stirred absorption methods for CO2 separation
title_sort performance comparison of ultrasonic-assisted and magnetic stirred absorption methods for co2 separation
publisher Springer Nature
publishDate 2020
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85100782153&doi=10.1007%2fs42452-020-3012-9&partnerID=40&md5=cc69826207aded055d1dc3642d1a45bf
http://eprints.utp.edu.my/23130/
_version_ 1738656428404506624
score 13.211869

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