Design of CO2 absorption plant for recovery of CO2 from flue gases of gas turbine

Mofarahi, Masoud; Khojasteh, Yaser; Khaledi, Hiwa; Farahnak, Arsalan

doi:10.1016/j.energy.2008.02.013

Cited by 155 publications

(66 citation statements)

References 19 publications

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“…For this purpose, a turbine with heat regeneration can be used. Considering that water has to give up heat to another medium (typically -amine [10]), the system seems to be the most interesting one due to the surplus of power. In the case of increased heat consumption for CO 2 capture of the order of 2.5 MJ/kg of CO 2 , the selection of the simple system is justified.…”

Section: Modelling Resultsmentioning

confidence: 99%

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The use of air-bottoming cycle as a heat source for the carbon dioxide capture installation of a coal-fired power unit

Chmielniak¹,

Lepszy²,

Czaja³

2011

Archives of Thermodynamics

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The use of air-bottoming cycle as a heat source for the carbon dioxide capture installation of a coal-fired power unitThe installations of CO2capture from flue gases using chemical absorption require a supply of large amounts of heat into the system. The most common heating medium is steam extracted from the cycle, which results in a decrease in the power unit efficiency. The use of heat needed for the desorption process from another source could be an option for this configuration. The paper presents an application of gas-air systems for the generation of extra amounts of energy and heat. Gas-air systems, referred to as the air bottoming cycle (ABC), are composed of a gas turbine powered by natural gas, air compressor and air turbine coupled to the system by means of a heat exchanger. Example configurations of gas-air systems are presented. The efficiency and power values, as well as heat fluxes of the systems under consideration are determined. For comparison purposes, the results of modelling a system consisting of a gas turbine and a regenerative exchanger are presented.

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Section: Modelling Resultsmentioning

confidence: 99%

“…Due to the possibility of corrosion, the direct flue gas -amine heat exchangers were not used. The typical operating temperatures for different kinds of amines such as methanolamine (MEA), diglycolamine (DEA), diglycolamine (DGA) or methyldiethanolamine (MDEA) are included in the range of 25-126 o C [10].…”

Section: Technological Structures Under Analysismentioning

confidence: 99%

The use of air-bottoming cycle as a heat source for the carbon dioxide capture installation of a coal-fired power unit

Chmielniak¹,

Lepszy²,

Czaja³

2011

Archives of Thermodynamics

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“…Both the power plant and the MEA process were simulated using the software package. The performances of amine solutions for design of CO 2 -capture from refinery gas using their own column model written in MATLAB combined with the equilibrium parameters of CHEMCAD and Aspen Plus were compared [6]. While the process simulators are useful, their capability is limited to predicting the behaviour of the process in response to changes in the process structure or operating variables.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Loading Capacity of MDEA and DEA for Amine-Based CO2 Removal Using Hysys

Otaraku¹,

Esemuze²

2015

AJCHE

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Abstract:Besides meeting international stringent LNG product specification, this work will address the problem of off-spec product, high operational cost of acid gas (CO 2 ) removal and pollution-free product, which is currently a huge global challenge. This work studied other ways by which amine unit can best be optimized to produce LNG gas with low CO 2 -content and high cost of acid gas removal. MDEA instead of DEA solvent-absorption method was chosen for the optimization using HYSYS 3.1 process simulator to predict the CO 2 removal through the establishment of process operating conditions. A base case of amine-based CO 2 removal process was used to create a steady-state and dynamic simulation using HYSYS 3.1 simulator. The differences between the values of acid gas loading capacity and CO 2 content of the existing DEA operational value and HYSYS simulations were 0.00005 and 4.98 respectively. This established the advantage and accuracy of the HYSYS simulator and the developed models. The simulation results showed that the proposed MDEA had higher CO 2 removal capacity of 89% to 55.02% for DEA and lower CO 2 content of 0.0012 mole of CO 2 in sweet gas to 0.014 mole of CO 2 in DEA. MDEA had higher solvent recovery of 83% to 60% recovery for DEA. The pump size required to recycle MDEA with molar flow rate of 1877 Kg mol/hr. was smaller and less expensive than that required for DEA at 2371 Kg mol./hr. resulting in lower production cost.

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“…Furthermore, it is an industrial practice to use two stages column each with different diameter to meet certain hydrodynamic characteristic requirement. Most of previous models assume only one component which moves through the interface or single component absorption and use one stage column [1,[18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of CO2 Absorption into Promoted Aqueous Potassium Carbonate Solution in Industrial Scale Packed Column

Altway

Susianto

Suprapto

et al. 2015

Bull. Chem. React. Eng. Catal.

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Carbon dioxide gas is a harmful impurity which is corrosive and it can damage the utilities and the piping system in industries. Chemical absorption is the most economical separation method which is widely applied in chemical industries for CO2 removal process. Hot potassium carbonate (K2CO3) is the most effective solvent that has been used extensively, especially for the CO2 separation process from gas synthesis and natural gas. This paper aims to develop mathematical model for investigating the CO2 absorption into promoted hot K2CO3 solution in industrial scale packed column in an ammonia plant. The CO2 was removed from the gas stream by counter-current absorption in two stages column. To represent the gas-liquid system, a rigorous mathematical model based on the two-film theory was considered. The model consists of differential mass and heat balance and considers the interactions between mass-transfer and chemical kinetics using enhancement factor concept. Gas solubility, mass and heat transfer coefficients, reaction kinetics and equilibrium were estimated using correlations from literatures. The model was validated using plant data and was used to compute temperature and concentration profiles in the absorber. The variation of CO2 recovery with respect to changes in some operating variables was evaluated. The effect of various kinds of promoters added into K2CO3 solution on the CO2 recovery was also investigated. The simulation results agree well with the plant data. The results of the simulation prediction, for the absorber pressure of 33 atm with a lean flow rate of 32,0867 kg/h, temperature of 343 K, and semi lean flow rate of 2,514,122 kg/h, temperature of 385 K, showed %CO2 removal of 95.55%, while that of plant data is 96.8%.

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Design of CO2 absorption plant for recovery of CO2 from flue gases of gas turbine

Cited by 155 publications

References 19 publications

The use of air-bottoming cycle as a heat source for the carbon dioxide capture installation of a coal-fired power unit

The use of air-bottoming cycle as a heat source for the carbon dioxide capture installation of a coal-fired power unit

Simulation of Loading Capacity of MDEA and DEA for Amine-Based CO2 Removal Using Hysys

Modeling and Simulation of CO2 Absorption into Promoted Aqueous Potassium Carbonate Solution in Industrial Scale Packed Column

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