Evaluation of split-flow scheme for CO2 absorption process using mechanistic mass-transfer and hydrodynamic model

2005 ◽  
pp. 1841-1844 ◽  
Author(s):  
A AROONWILAS
Keyword(s):  
Mass Transfer ◽  
Hydrodynamic Model ◽  
Co2 Absorption ◽  
Absorption Process ◽  
Flow Scheme ◽  
Split Flow

scholarly journals Amine-based carbon dioxide absorption: evaluation of kinetic and mass transfer parameters

2018 ◽  
Vol 12 (4) ◽  
pp. 4088-4097
Author(s):  
S. Ma’mun ◽  
Hallvard F. Svendsen ◽  
I. M. Bendiyasa
Keyword(s):  
Carbon Dioxide ◽  
Mass Transfer ◽  
Atmospheric Pressure ◽  
Co2 Concentration ◽  
Co2 Absorption ◽  
Absorption Process ◽  
Carbon Dioxide Absorption ◽  
Global Emission ◽  
Transfer Parameters ◽  
Carbon Dioxide Co2

Global emission of carbon dioxide (CO2), a major contributor to the climate change, has increased annually and it reached over 37 Gt in 2017. An effort to reduce the emission, therefore, needs to be conducted, e.g. post-combustion capture by use of amine-based absorption. The objective of this study is to evaluate the kinetic and mass transfer parameters in a CO2 absorption process using monoethanolamine (MEA), 2-(methylamino)ethanol (MMEA), and 2-(ethylamino)ethanol (EMEA) as absorbents. The experiments were conducted in a bubble reactor at atmospheric pressure and 40 °C with 10-vol% CO2 flowrate of 5 NL/men. The CO2 concentration leaving the reactor was measured by an IR CO2 analyzer. The results obtained from this experiment were the overall absorption rates consisting of both chemical reaction and mass transfer. Analysis result shows that the reaction between CO2 and amines takes place fast, therefore the mass transfer of CO2 from the gas into the liquid through the gas film would control the overall absorption rate.

Mass-Transfer Characteristics of the CO2 Absorption Process in a Rotating Packed Bed

2016 ◽  
Vol 30 (5) ◽  
pp. 4215-4220 ◽  
Author(s):  
Miaopeng Sheng ◽  
Baochang Sun ◽  
Fuming Zhang ◽  
Guangwen Chu ◽  
Lili Zhang ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Packed Bed ◽  
Co2 Absorption ◽  
Absorption Process ◽  
Transfer Characteristics ◽  
Rotating Packed Bed

Entropy Generation Analysis of a Chemical Absorption Process Where Carbon Dioxide is Absorbed by Falling Monoethanolamine Solution Film

2014 ◽  
Vol 136 (12) ◽  
Author(s):  
Imen Chermiti ◽  
Nejib Hidouri ◽  
Ammar Ben Brahim
Keyword(s):  
Mass Transfer ◽  
Chemical Reaction ◽  
Entropy Generation ◽  
Co2 Absorption ◽  
Falling Film ◽  
Total Entropy ◽  
Absorption Process ◽  
Viscous Effects ◽  
Chemical Absorption ◽  
Falling Liquid Film

The present paper reports a study about entropy generation analysis for the case of chemical absorption of a gas into laminar falling liquid film. The CO2 absorption into monoethanolamine (MEA) aqueous solutions has been considered. Temperature and concentration expressions are determined by using Laplace transform and used for the entropy generation calculation. The effects of irreversibilities due to heat transfer, mass transfer, viscous effects, coupling effects between heat and mass transfer, and chemical reaction on the total entropy generation of the considered system are derived. The obtained results show that entropy generation is mainly due to chemical reaction irreversibility at the gas–liquid interface. Between this interface and the reaction film thickness (where the reaction take place), entropy generation is due to both chemical reaction and mass transfer irreversibilities. More details concerning the contribution of each kind of irreversibility to entropy generation through the falling film are graphically presented and discussed.

Theoretical Study of CO2 Absorption into Novel Reactive 1DMA2P Solvent in Split-flow Absorber-stripper Unit: Mass Transfer Performance and Kinetic Analysis

2019 ◽  
Vol 17 (12) ◽  
Author(s):  
Majid Saidi
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Co2 Absorption ◽  
Transfer Performance ◽  
Amine Concentration ◽  
Liquid Feed ◽  
Split Flow ◽  
Overall Mass Transfer Coefficient ◽  
Feed Temperature

Abstract In the present study, the mass transfer performance of CO2 absorption into 1-dimethylamino-2-propanol (1DMA2P) as a novel amino alcohol solvent has been theoretically investigated in a split-flow absorber-stripper unit. The mass transfer performance has been presented in terms of CO2 absorption flux and overall mass transfer coefficient (KGav) by simultaneous considering of chemical reactions and mass transfer phenomenon. The developed comprehensive mathematical model has been validated based on related experimental data in literature. The impact of main operation parameters including liquid feed temperature, amine concentration, liquid velocity and CO2 loading were evaluated. The presented results indicated that increasing the liquid feed temperature, amine concentration and liquid flow rate improves the overall mass transfer coefficient. Also, the CO2 absorption performance of conventional and alternative amines such as monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA), methyldiethanolamine (MDEA), piperazine (PZ), 4-(diethylamino)-2-butanol (DEAB) and 1DMA2P have been investigated and compared in order to provide guidelines about effective screening of solvents. The modeling results indicated that the KGav for CO2 absorption into different solution can be ranked as follows: PZ>MEA>DEA>DEAB>1DMA2P>MDEA>TEA.

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