Onsite CO2 Capture from Flue Gas by an Adsorption Process in a Coal-Fired Power Plant

2012 ◽  
Vol 51 (21) ◽  
pp. 7355-7363 ◽  
Author(s):  
Zhen Liu ◽  
Lu Wang ◽  
Xiangming Kong ◽  
Ping Li ◽  
Jianguo Yu ◽  
...  
Keyword(s):  
Power Plant ◽  
Co2 Capture ◽  
Flue Gas ◽  
Adsorption Process

Rapid Cycle Temperature Swing Adsorption Process Using Solid Structured Sorbent for CO2 capture from Cement Flue Gas

2021 ◽  
Author(s):  
Pierre Hovington ◽  
Omid Ghaffari-Nik ◽  
Laurent Mariac ◽  
Andrew Liu ◽  
Brett Henkel ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Flue Gas ◽  
Adsorption Process ◽  
Temperature Swing ◽  
Temperature Swing Adsorption ◽  
Cycle Temperature

Performance Prediction of High-Temperature CO2 Capture System Utilizing Lithium Silicate for Pulverized Coal-Fired Power Plant

2005 ◽  
Author(s):  
Takao Nakgaki ◽  
Katsuya Yamashita ◽  
Masahiro Kato ◽  
Kenji Essaki ◽  
Takayuki Iwahashi ◽  
...  
Keyword(s):  
Power Plant ◽  
Co2 Capture ◽  
Flue Gas ◽  
Reaction Rate ◽  
Exothermic Reaction ◽  
Significant Loss ◽  
Pulverized Coal ◽  
Lithium Silicate ◽  
Reactor Performance ◽  
Co2 Sorbent

Lithium silicate is a solid CO2-sorbent that can be used repeatedly, and uniquely features absorption of CO2 at temperatures between 500°C and 600°C with an exothermic reaction and regeneration at temperatures above 700°C with an endothermic reaction. This paper introduces the conceptual model and feasibility study of the CO2 capture system utilizing the lithium silicate applicable to a pulverized coal-fired power plant. In this system, assuming a moving bed, the sorbent reactor is installed in a 500MW boiler and absorbs CO2 in the flue gas, and after the absorption process, recirculation of CO2 transports the heat for regeneration. To design the system, unsteady state numerical analysis was used to predict the reactor performance in a 60-minute cycle for absorption and regeneration, which includes the reaction rate based on experimental data. The analysis result indicates that about 20% of CO2 can be captured from flue gas without significant loss in the power generation efficiency.

scholarly journals Comparative 3-E (Energy, Exergy & Environmental) Analysis of Oxy-Coal and Air-Coal Combustion based 500 MWe Supercritical Steam Power Plants with CO2 Capture

2020 ◽  
Vol 5 (4) ◽  
pp. 652-662
Author(s):  
Soumya Jyoti Chatterjee ◽  
Goutam Khankari ◽  
Sujit Karmakar
Keyword(s):  
Power Plant ◽  
Co2 Capture ◽  
Flue Gas ◽  
Coal Combustion ◽  
Co2 Emission ◽  
Power Plants ◽  
Exergy Destruction ◽  
Furnace Temperature ◽  
Auxiliary Power ◽  
Energy And Exergy

The comparative performance study is carried out for 500 MW Supercritical (SupC) Oxy-Coal Combustion (OCC) and Air-Coal Combustion (ACC) power plants with membrane-based CO2 capture at the fixed furnace temperature. The proposed configurations are modelled using a computer-based analysis software 'Cycle-Tempo' at different operating conditions, and the detailed thermodynamic study is done by considering Energy, Exergy, and Environmental (3-E) analysis. The result shows that the net energy and exergy efficiencies of ACC power plants with CO2 capture are about 35.07 % and 30.88 %, respectively, which are about 6.44 % and 5.77 % points, respectively higher than that of OCC power plant. Auxiliary power consumption of OCC based power plant is almost 1.97 times more than that of the ACC based plant due to huge energy utilization in the Air Separation Unit (ASU) of OCC plant which leads to performance reduction in OCC plant. However, environmental benefit of OCC based power plant is more than that of ACC based power plant with respect to CO2 emission. OCC plant emits about 0.164 kg/kWh of CO2 which is approximately 16.75 times lower than the CO2 emission in ACC based power plant. It is also analyzed that the performance of the CO2 Capture Unit (CCU) for the OCC based plant is about 3.65 times higher than the ACC based power plant due to higher concentration of CO2 (nearly 80.63%) in the flue gas emitting from OCC plant. The study also reveals that the auxiliary power consumption per kg of CO2 capture of the OCC based plant is about 0.142 kWh/kg, which is approximately 0.06 times lower than the ACC based plant. The higher performance of the OCC based power plant is found at lower value of flue gas recirculation due to the fact that reduction in exergy destruction at the mixing zone of the combustor is higher than the increase in exergy destruction of the heat exchangers at higher furnace exit temperature. But the metallurgical temperature limit of boiler tube materials restricts the use of the higher value of furnace temperature. OCC based power plant with CO2 capture can be preferred over ACC based plant with CO2 capture due to higher environmental benefits towards mitigating CO2, the key greenhouse gas on earth in spite of exhibiting lesser energy and exergy efficiencies.

Simulation and Optimization of a Dual-Adsorbent, Two-Bed Vacuum Swing Adsorption Process for CO2 Capture from Wet Flue Gas

2014 ◽  
Vol 53 (37) ◽  
pp. 14462-14473 ◽  
Author(s):  
Shreenath Krishnamurthy ◽  
Reza Haghpanah ◽  
Arvind Rajendran ◽  
Shamsuzzaman Farooq
Keyword(s):  
Co2 Capture ◽  
Flue Gas ◽  
Adsorption Process ◽  
Simulation And Optimization ◽  
Vacuum Swing Adsorption

Solvent Degradation in CO2 Capture Process from Power Plant Flue Gas

2014 ◽  
Vol 49 (6) ◽  
pp. 371-375
Author(s):  
Haroon Ur Rashid ◽  
Khalid Khan ◽  
Muhammad Yaseen ◽  
Muhammad Naveed Umar
Keyword(s):  
Power Plant ◽  
Co2 Capture ◽  
Flue Gas ◽  
Capture Process

Flue Gas Recirculation in a Gas Turbine: Impact on Performance and Operational Behavior

2011 ◽  
Author(s):  
Frank Sander ◽  
Richard Carroni ◽  
Stefan Rofka ◽  
Eribert Benz
Keyword(s):  
Power Plant ◽  
Co2 Capture ◽  
Flue Gas ◽  
Power Plants ◽  
Combustion Process ◽  
Combined Cycle ◽  
Flue Gas Recirculation ◽  
Overall Performance ◽  
Gas Recirculation ◽  
The Impact

The rigorous reduction of greenhouse gas emissions in the upcoming decades is only achievable with contribution from the following strategies: production efficiency, demand reduction of energy and carbon dioxide (CO2) capture from fossil fueled power plants. Since fossil fueled power plants contribute largely to the overall global greenhouse gas emissions (> 25% [1]), it is worthwhile to capture and store the produced CO2 from those power generation processes. For natural-gas-fired power plants, post-combustion CO2 capture is the most mature technology for low emissions power plants. The capture of CO2 is achieved by chemical absorption of CO2 from the exhaust gas of the power plant. Compared to coal fired power plants, an advantage of applying CO2 capture to a natural-gas-fired combined cycle power plant (CCPP) is that the reference cycle (without CO2 capture) achieves a high net efficiency. This far outweighs the drawback of the lower CO2 concentration in the exhaust. Flue Gas Recirculation (FGR) means that flue gas after the HRSG is partially cooled down and then fed back to the GT intake. In this context FGR is beneficial because the concentration of CO2 can be significantly increased, the volumetric flow to the CO2 capture unit will be reduced, and the overall performance of the CCPP with CO2 capture is increased. In this work the impact of FGR on both the Gas Turbine (GT) and the Combined Cycle Power Plant (CCPP) is investigated and analyzed. In addition, the impact of FGR for a CCPP with and without CO2 capture is investigated. The fraction of flue gas that is recirculated back to the GT, need further to be cooled, before it is mixed with ambient air. Sensitivity studies on flue gas recirculation ratio and temperature are conducted. Both parameters affect the GT with respect to change in composition of working fluid, the relative humidity at the compressor inlet, and the impact on overall performance on both GT and CCPP. The conditions at the inlet of the compressor also determine how the GT and water/steam cycle are impacted separately due to FGR. For the combustion system the air/fuel-ratio (AFR) is an important parameter to show the impact of FGR on the combustion process. The AFR indicates how close the combustion process operates to stoichiometric (or technical) limit for complete combustion. The lower the AFR, the closer operates the combustion process to the stoichiometric limit. Furthermore, the impact on existing operational limitations and the operational behavior in general are investigated and discussed in context of an operation concept for a GT with FGR.

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