Effectiveness of absorber intercooling for CO 2 absorption from natural gas fired flue gases using monoethanolamine solvent

Rezazadeh, Fatemeh; Gale, William F.; Rochelle, Gary T.; Sachde, Darshan

doi:10.1016/j.ijggc.2017.01.016

Cited by 39 publications

(24 citation statements)

References 20 publications

(2 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Different process configurations such as absorber inter-cooling [10], stripper inter-heating [11], rich solvent splitting [12], stripper overhead compression [13], lean vapor compression (LVC) [14], rich vapor compression [14] and many other process modifications have been reported to reduce the energy penalty of the process. Dmartiz et al [15] compared the energy consumption of various amine absorption process configurations and concluded that improvement to the configuration has substantial potential to improve the energetic efficiency of the process.…”

Section: Nomenclature Aimentioning

confidence: 99%

Energy minimization of carbon capture and storage by means of a novel process configuration

Ali

Sultan

Lee

et al. 2020

Energy Conversion and Management

View full text Add to dashboard Cite

Carbon capture and storage is considered a key technology for decarbonizing the heat and power industries and achieving net zero emission targets. However, the significant energy requirements of the process as currently utilized hinders its widespread implementation. This work presents a novel process configuration by which the energy expenditures of carbon capture and storage can be minimized. This configuration is intended to enhance heat integration during the capture process through an innovative combination of three stripper modifications, namely lean vapor compression, a rich solvent split with vapor heat recovery and reboiler condensate heat recovery using a stripper inter-heater in a single flow-sheet. For carbon dioxide compression, a novel pressurization strategy involving carbon dioxide multi-stage compressors, a heat pump system and a supercritical carbon dioxide power cycle was designed and evaluated. The heat pump was used for carbon dioxide liquefaction while the supercritical carbon dioxide power cycle was employed to recover the intercooling heat. Through a comprehensive parametric investigation of the proposed configuration, the optimum value of the key operating parameters i.e., the split fraction, flash pressure, stripper inter-heater location, stripper inter-heater solvent flowrate, carbon dioxide liquefaction pressure and supercritical carbon dioxide cycle turbine pressure ratio were estimated.The performance of the proposed design at the optimized condition was quantified in terms of the reboiler heat duty, the carbon dioxide pressurization power and the equivalent work and compared to a baseline case post-combustion carbon capture and storage process. The proposed case reduced the reboiler heat duty from 3.36 GJ/TonneCO2 to 2.65 GJ/TonneCO2 and the electric power required for carbon dioxide compression from 16,691 kW to 14,708 kW. The results demonstrate that the new design can significantly

show abstract

Section: Nomenclature Aimentioning

confidence: 99%

Energy minimization of carbon capture and storage by means of a novel process configuration

Ali

Sultan

Lee

et al. 2020

Energy Conversion and Management

View full text Add to dashboard Cite

show abstract

“…Absorber intercooling can improve column performance by increasing the thermodynamic driving force for mass transfer and reducing the magnitude of the temperature bulge 21 . Intercooling has been investigated for postcombustion capture from coal 22 and natural gas power plants, 23 and for a range of solvents including MEA, 24 pipperazine, 25 and potassium carbonate 26 . Oko et al 27 recently demonstrated that intercooling is essential for rotating bed absorbers utilizing concentrated (70 wt%) MEA solutions, and discussed a range of process configurations.…”

Section: Introductionmentioning

confidence: 99%

Advanced absorber heat integration via heat exchange packings

et al. 2021

View full text Add to dashboard Cite

A rate‐based model of an absorption column was developed and used to analyze several intercooling strategies utilizing “heat exchange packings.” These packings are capable of removing heat from the column and transferring it to a cooling fluid within the packing. For absorption of CO2 into aqueous monoethanolamine under industrial conditions, intercooling via heat exchange packings placed along 10–20% of the column could reduce the column height by ∼15%. The height of these columns was close to the minimum theoretical value, calculated by numerically optimizing the temperature profile. Effective intercooling could also be achieved by using the cool, rich solvent as the cooling fluid. This reduces the cooling load and facilitates recovery of waste heat. Heat exchange packings could also be used to redistribute heat within the column, reducing the column height with no net cooling load. However, this approach requires larger heat transfer coefficients than have been experimentally observed.

show abstract

“…A description of the chemical absorption that takes place in a PCC system can be achieved by modelling, using either an equilibrium or rate-based mass-transfer, with a number of studies being validated against pilot plant data [9,12,[22][23][24]. Rate-based simulations can provide a greater accuracy and allow a more informed evaluation of the process [12,14,17,[23][24][25][26] but equilibrium approaches can still be employed for process assessment [11,19,27,28]. The relative simplicity of an equilibrium approach and the ability to improve the accuracy of such a model with stage efficiencies [16,19,[29][30][31] is the justification for employing such a strategy here.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Post Combustion CO2 Capture from a Combined-Cycle Gas Turbine Power Plant via Taguchi Design of Experiment

Petrovic

Soltani

2019

Processes

View full text Add to dashboard Cite

The potential of carbon capture and storage to provide a low carbon fossil-fueled power generation sector that complements the continuously growing renewable sector is becoming ever more apparent. An optimization of a post combustion capture unit employing the solvent monoethanolamine (MEA) was carried out using a Taguchi design of experiment to mitigate the parasitic energy demands of the system. An equilibrium-based approach was employed in Aspen Plus to simulate 90% capture of the CO2 emitted from a 600 MW natural gas combined-cycle gas turbine power plant. The effects of varying the inlet flue gas temperature, absorber column operating pressure, amount of exhaust gas recycle, and amine concentration were evaluated using signal to noise ratios and analysis of variance. The optimum levels that minimized the specific energy requirements were a: flue gas temperature = 50 °C; absorber pressure = 1 bar; exhaust gas recirculation = 20% and; amine concentration = 35 wt%, with a relative importance of: amine concentration > absorber column pressure > exhaust gas recirculation > flue gas temperature. This configuration gave a total capture unit energy requirement of 5.05 GJ/tonneCO2, with an energy requirement in the reboiler of 3.94 GJ/tonneCO2. All the studied factors except the flue gas temperature, demonstrated a statistically significant association to the response.

show abstract

Effectiveness of absorber intercooling for CO 2 absorption from natural gas fired flue gases using monoethanolamine solvent

Cited by 39 publications

References 20 publications

Energy minimization of carbon capture and storage by means of a novel process configuration

Energy minimization of carbon capture and storage by means of a novel process configuration

Advanced absorber heat integration via heat exchange packings

Optimization of Post Combustion CO2 Capture from a Combined-Cycle Gas Turbine Power Plant via Taguchi Design of Experiment

Contact Info

Product

Resources

About