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To Study the Effect of G/L Flow Rate Ratio on CO2 Absorption in Aqueous Mea Solution
1. Abstract of Emerging Trends in Scientific Research, 2014, Vol.1
DOI: 10.18488/journal.1002/2014.1/1002.1
1st
International Conference on Emerging Trends in
Scientific Research
15-16 March, 2014
Pearl International Hotel Kuala Lumpur, Malaysia
Conference Website: www.pakrdw.com
92
Paper ID: 378/14/1
st
ICETSR
To Study the Effect of G/L Flow Rate Ratio on CO2
Absorption in Aqueous Mea Solution
Harith Rashid1
--- Nurul Hasan2
--- Sharifah Bee Abd Hamid3
--- M. Iskandar M. Nor4
1,2,3
Centre for Research in Nanotechnology & Catalysis (NANOCEN), IPS Building, University of Malaya,
50603 Kuala Lumpur, Malaysia
4
Department of Chemical Engineering, University of Malaya, Kuala Lumpur, Malaysia
Abstract
Flow rate is one of the important factors for CO2 absorption process. Performance of
packed column for CO2 absorption in MEA (monoethanolamine) solution, for different gas
and liquid flow rates were studied in this research with low MEA concentration. Flow rate
for lean amine solution were in the range of 5 to 25 m3
m-2
h-1
for a 5 unit step change and
sour gas flow rate were in the range of 15 to 75 m3
m-2
h-1
. Concentration of MEA in this
study was 2.0 and 3.0 kmol/m3
and mass fraction for CO2 in sour gas was 14.35 mole
percent. Plate efficiency for each packing element was varied from 15% to 25% for all the
simulations. It has been found that CO2 absorption is more efficient at high gas and liquid
flow rates. For 25 m3
m-2
h-1
amine solution flow rate, high CO2 mass transfer is observed
as compared to other flow rates (5 m3
m-2
h-1
). Similarly, CO2 absorption is higher at low
sour gas flow rates as compared to high gas flow rates and maximum CO2 absorption is
achieved at 1m height of the column for 75 kmol m-2
h-1
amine solution flow rate.
Predicted CO2 absorption under different plate efficiency was comparable with
experimental data and it was found that predicted data is within 1% deviation from
experimental data.
Keywords: CO2 absorption, MEA, Packed column, Flow rate, Packing efficiency.
