eprintid: 8351
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/83/51
datestamp: 2023-11-09 16:20:14
lastmod: 2023-11-09 16:20:14
status_changed: 2023-11-09 16:12:26
type: article
metadata_visibility: show
creators_name: Tay, W.H.
creators_name: Lau, K.K.
creators_name: Shariff, A.M.
title: High performance promoter-free CO2 absorption using potassium carbonate solution in an ultrasonic irradiation system
ispublished: pub
keywords: Air purification; Carbon dioxide; Carbonation; Irradiation; Mass transfer; Potassium; Solvents; Volumetric analysis, CO2 absorption; Heat of absorptions; High frequency HF; Mass transfer process; Potential technologies; Regeneration energy; Ultrasound irradiation; Volumetric mass transfer coefficient, Ultrasonic testing
note: cited By 20
abstract: CO2 capture for power plant and natural gas purification using absorption process suffers two major drawbacks: large absorption body and high regeneration energy. The high energy penalty of absorption technology can be addressed using low heat of absorption solvent. However, the challenge of using low heat of absorption solvent is to develop a practical approach to intensify absorption rate. In recent years, high frequency ultrasonic system emerges as a potential technology for mass transfer process. In this study, the potential of using high frequency ultrasonic system have been investigated using the slow kinetic solvent: (potassium carbonate) without utilizing any chemical promoter. The ultrasonic-assisted absorption system with 20 wt potassium carbonate (without promoter) has provides 1.75 times higher volumetric mass transfer coefficient than the Piperazine (PZ) promoted potassium carbonate using stirring method. The absorption rate has been increased up to 32 times as compared to the case without ultrasonic irradiation. Besides, the required absorption time to achieve 0.9 loading (CO2 mole/K2CO3 mole) has been significantly reduced to approximate 400 s. Furthermore, an ultrasonic-assisted absorption model has been developed by including the atomization, ultrasonic streaming, and ultrasonic chemical effect in order to investigate the mechanism involved in high frequency ultrasonic-assisted absorption. Based on the model validation study, the ultrasonic chemical effect is essential to be considered in order to match the simulated and the experimental results. The results of current study prove that, high frequency ultrasonic system possesses high potential to be utilized to enhance the absorption using promoter-free potassium carbonate. © 2017 Elsevier Ltd. All rights reserved.
date: 2017
publisher: Elsevier Ltd
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85027543952&doi=10.1016%2fj.jcou.2017.08.003&partnerID=40&md5=3267da13c049b349fe99a0874f673457
id_number: 10.1016/j.jcou.2017.08.003
full_text_status: none
publication: Journal of CO2 Utilization
volume: 21
pagerange: 383-394
refereed: TRUE
issn: 22129820
citation:   Tay, W.H. and Lau, K.K. and Shariff, A.M.  (2017) High performance promoter-free CO2 absorption using potassium carbonate solution in an ultrasonic irradiation system.  Journal of CO2 Utilization, 21.  pp. 383-394.  ISSN 22129820