Ultrasound intensified CO^sub 2^ desorption from pressurized loaded monoethanolamine solutions. I. parameters investigation and modelling

CO2 stripping from loaded monoethanolamine (MEA) aqueous solutions intensified by means of ultrasound was investigated in a lab-scale kettle reboiler with both gas and liquid continuous operations. The reboiler operating conditions were similar to those of a typical industrial reboiler with a pressu...

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Bibliographic Details
Published inEnergy (Oxford) Vol. 163; p. 168
Main Authors Ying, Jiru, Eimer, Dag A, Brakstad, Frode, Haugen, Hans Aksel
Format Journal Article
LanguageEnglish
Published Oxford Elsevier BV 15.11.2018
Subjects
Aqueous solutions
Carbon dioxide
Computational fluid dynamics
Data analysis
Data processing
Desorption
Energy conservation
Energy consumption
Flow rates
Flow velocity
Kettles
Liquid flow
Mathematical models
Monoethanolamine (MEA)
Parameters
Pressure
Pressure effects
Stripping
Ultrasonic imaging
Ultrasound
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Summary:CO2 stripping from loaded monoethanolamine (MEA) aqueous solutions intensified by means of ultrasound was investigated in a lab-scale kettle reboiler with both gas and liquid continuous operations. The reboiler operating conditions were similar to those of a typical industrial reboiler with a pressure of 1 barg, and where the CO2 loading is less than 0.25 mol CO2/mol MEA. Intermittent ultrasound application was tested to find the effects of variables for CO2 stripping from the CO2 loadings 0.20–0.39 mol/mol at pressures up to 1.5 barg. Multi-variate data analysis was employed, and a model was built to explain and find the effects of six variables on CO2 stripping by ultrasound. The six variables include pressure, liquid flow rate, CO2 loading, intensity, frequency and on-stream time of ultrasound. The variable analysis results manifest that the CO2 loading is the significant positive effect variable, pressure is negative on energy saving and CO2 stripping rate and ultrasound parameters have varied effects. Experimental results show that the CO2 stripping rate assisted by ultrasound is 4 times than by heat only when CO2 loading is high, and the best result of specific energy consumption was 2.3 MJ/kg CO2 in the present test conditions.
ISSN:0360-5442
1873-6785