The Experts below are selected from a list of 91056 Experts worldwide ranked by ideXlab platform
Paul Feron - One of the best experts on this subject based on the ideXlab platform.
-
preliminary analysis of process flow sheet modifications for energy efficient co2 capture from Flue Gases using chemical absorption
Chemical Engineering Research & Design, 2011Co-Authors: Ashleigh Cousins, Leigh Wardhaugh, Paul FeronAbstract:Abstract The energy penalty associated with solvent based capture of CO2 from power station Flue Gases can be reduced by incorporating process flow sheet modifications into the standard process. A review of modifications suggested in the open and patent literature identified several options, primarily intended for use in the gas processing industry. It was not immediately clear whether these options would have the same benefits when applied to CO2 capture from near atmospheric pressure combustion Flue Gases. Process flow sheet modifications, including split flow, rich split, vapour recompression, and inter-stage cooling, were therefore modelled using a commercial rate-based simulation package. The models were completed for a Queensland (Australia) based pilot plant running on 30% MEA as the solvent. The preliminary modelling results showed considerable benefits in reducing the energy penalty of capturing CO2 from combustion Flue Gases. Further work will focus on optimising and validating the most relevant process flow sheet modifications in a pilot plant.
-
a survey of process flow sheet modifications for energy efficient co2 capture from Flue Gases using chemical absorption
International Journal of Greenhouse Gas Control, 2011Co-Authors: Ashleigh Cousins, Leigh Wardhaugh, Paul FeronAbstract:The energy penalty associated with solvent based capture of CO2 from power station Flue Gases can be reduced by incorporating flow sheet modifications to the standard process. Fifteen process flow sheet modifications for chemical based CO2 absorption processes are reviewed, with a particular focus on the patent literature. The proposed flow sheet modifications identify potentially moderate to large improvements in the energy performance of the chemical absorption process. Most process modifications suggested in the patent literature report very little if any supporting experimental evidence. Where supporting data does exist it tends to be based on process modelling results. Moreover, earlier patents tend to focus on the gas processing industry and it is not immediately clear whether the same benefits can be extended to CO2 capture from near atmospheric pressure Flue Gases. It is clear from the survey that there is considerable scope for achieving improved process performance through process flow sheet modifications. However further process modelling and, in particular, experimental work focused on post-combustion CO2 capture is needed to map the technical potential for improvements.
Zhenshan Li - One of the best experts on this subject based on the ideXlab platform.
-
continuous co2 capture from Flue Gases using a dual fluidized bed reactor with calcium based sorbent
Industrial & Engineering Chemistry Research, 2009Co-Authors: Fan Fang, Zhenshan LiAbstract:CO2 capture using multiple carbonation and calcination reaction looping is an emerging postcombustion capture technology. Dual fluidized bed reactors are the key technology to fulfill the carbonation/calcination looping process. Dual bubbling fluidized bed reactors were constructed to demonstrate the process feasibility of continuous CO2 capture from Flue Gases. First, a cold model of the dual bubbling fluidized bed reactor was built and tested on the foundation of analyzing different types of dual fluidized bed reactors. Long-term stable operation and continuous solids circulation between the two reactors was achieved in the cold model. The solids circulation rate increased with increasing bed material height, solid injection nozzle diameter, and hole diameter on the solid injection nozzle. Second, a hot model of the dual bubbling fluidized bed reactor was constructed. The sorbent particles successfully circulated between the carbonator and the regenerator at high temperatures and the CO2 in the Flue gas...
-
experiment and modeling of co2 capture from Flue Gases at high temperature in a fluidized bed reactor with ca based sorbents
Energy & Fuels, 2009Co-Authors: Fan Fang, Zhenshan LiAbstract:The cyclic CO2 capture and CaCO3 regeneration characteristics in a small fluidized bed reactor were experimentally investigated with limestone and dolomite sorbents. Kinetic rate constants for carbonation and calcination were determined using thermogravimetric analysis (TGA) data. Mathematical models developed to model the Ca-based sorbent multiple cycles of CO2 capture and calcination in the bubbling fluidized bed reactor agreed with the experimental data. The experimental and simulated results showed that the CO2 in Flue Gases could be absorbed efficiently by limestone and dolomite. The time for high-efficiency CO2 capture decreased with an increasing number of cycles because of the loss of sorbent activity, and the final CO2 capture efficiency remained nearly constant as the sorbent reached its final residual capture capacity. In a continuous carbonation and calcination system, corresponding to the sorbent activity loss, the carbonation kinetic rates of sorbent undergoing various cycles are different, ...
Ashleigh Cousins - One of the best experts on this subject based on the ideXlab platform.
-
preliminary analysis of process flow sheet modifications for energy efficient co2 capture from Flue Gases using chemical absorption
Chemical Engineering Research & Design, 2011Co-Authors: Ashleigh Cousins, Leigh Wardhaugh, Paul FeronAbstract:Abstract The energy penalty associated with solvent based capture of CO2 from power station Flue Gases can be reduced by incorporating process flow sheet modifications into the standard process. A review of modifications suggested in the open and patent literature identified several options, primarily intended for use in the gas processing industry. It was not immediately clear whether these options would have the same benefits when applied to CO2 capture from near atmospheric pressure combustion Flue Gases. Process flow sheet modifications, including split flow, rich split, vapour recompression, and inter-stage cooling, were therefore modelled using a commercial rate-based simulation package. The models were completed for a Queensland (Australia) based pilot plant running on 30% MEA as the solvent. The preliminary modelling results showed considerable benefits in reducing the energy penalty of capturing CO2 from combustion Flue Gases. Further work will focus on optimising and validating the most relevant process flow sheet modifications in a pilot plant.
-
a survey of process flow sheet modifications for energy efficient co2 capture from Flue Gases using chemical absorption
International Journal of Greenhouse Gas Control, 2011Co-Authors: Ashleigh Cousins, Leigh Wardhaugh, Paul FeronAbstract:The energy penalty associated with solvent based capture of CO2 from power station Flue Gases can be reduced by incorporating flow sheet modifications to the standard process. Fifteen process flow sheet modifications for chemical based CO2 absorption processes are reviewed, with a particular focus on the patent literature. The proposed flow sheet modifications identify potentially moderate to large improvements in the energy performance of the chemical absorption process. Most process modifications suggested in the patent literature report very little if any supporting experimental evidence. Where supporting data does exist it tends to be based on process modelling results. Moreover, earlier patents tend to focus on the gas processing industry and it is not immediately clear whether the same benefits can be extended to CO2 capture from near atmospheric pressure Flue Gases. It is clear from the survey that there is considerable scope for achieving improved process performance through process flow sheet modifications. However further process modelling and, in particular, experimental work focused on post-combustion CO2 capture is needed to map the technical potential for improvements.
Fan Fang - One of the best experts on this subject based on the ideXlab platform.
-
continuous co2 capture from Flue Gases using a dual fluidized bed reactor with calcium based sorbent
Industrial & Engineering Chemistry Research, 2009Co-Authors: Fan Fang, Zhenshan LiAbstract:CO2 capture using multiple carbonation and calcination reaction looping is an emerging postcombustion capture technology. Dual fluidized bed reactors are the key technology to fulfill the carbonation/calcination looping process. Dual bubbling fluidized bed reactors were constructed to demonstrate the process feasibility of continuous CO2 capture from Flue Gases. First, a cold model of the dual bubbling fluidized bed reactor was built and tested on the foundation of analyzing different types of dual fluidized bed reactors. Long-term stable operation and continuous solids circulation between the two reactors was achieved in the cold model. The solids circulation rate increased with increasing bed material height, solid injection nozzle diameter, and hole diameter on the solid injection nozzle. Second, a hot model of the dual bubbling fluidized bed reactor was constructed. The sorbent particles successfully circulated between the carbonator and the regenerator at high temperatures and the CO2 in the Flue gas...
-
experiment and modeling of co2 capture from Flue Gases at high temperature in a fluidized bed reactor with ca based sorbents
Energy & Fuels, 2009Co-Authors: Fan Fang, Zhenshan LiAbstract:The cyclic CO2 capture and CaCO3 regeneration characteristics in a small fluidized bed reactor were experimentally investigated with limestone and dolomite sorbents. Kinetic rate constants for carbonation and calcination were determined using thermogravimetric analysis (TGA) data. Mathematical models developed to model the Ca-based sorbent multiple cycles of CO2 capture and calcination in the bubbling fluidized bed reactor agreed with the experimental data. The experimental and simulated results showed that the CO2 in Flue Gases could be absorbed efficiently by limestone and dolomite. The time for high-efficiency CO2 capture decreased with an increasing number of cycles because of the loss of sorbent activity, and the final CO2 capture efficiency remained nearly constant as the sorbent reached its final residual capture capacity. In a continuous carbonation and calcination system, corresponding to the sorbent activity loss, the carbonation kinetic rates of sorbent undergoing various cycles are different, ...
M Alonso - One of the best experts on this subject based on the ideXlab platform.
-
sorbent attrition in a carbonation calcination pilot plant for capturing co2 from Flue Gases
Fuel, 2010Co-Authors: Belen Gonzalez, M Alonso, Carlos J AbanadesAbstract:Abstract There is increasing interest in CO2 looping cycles that involve the repeated calcination and carbonation of the sorbent as a way to capture CO2 from Flue Gases during the carbonation step and the generation of a pure stream of CO2 in the oxyfired calcination step. In particular, attrition of the material in these interconnected fluidized bed reactors is a problem of general concern. Attrition of limestone derived materials has been studied in fluidized bed systems by numerous authors. In this work, we have investigated the attrition of two limestones used in a system of two interconnected circulating fluidized bed reactors operating in continuous mode as carbonation and calciner reactors. We observed a rapid initial attrition of both limestones during the calcination step which was then followed by a highly stable period (up to 140 h of added circulation for one of the limestones) during which particle size changes were negligible. This is consistent with previous observations of attrition in other systems that employ these materials. However, a comparison of the attrition model constants with the data reported in the literature showed the two limestones to be particularly fragile during the initial calcination and the first few hours of circulation. Thus, a careful choice of limestone based on its attrition properties must be taken into account in designing future carbonate looping systems.
-
carbon dioxide capture from combustion Flue Gases with a calcium oxide chemical loop experimental results and process development
International Journal of Greenhouse Gas Control, 2010Co-Authors: M Alonso, Nuria Rodriguez, Belen Gonzalez, G Grasa, R Murillo, J C AbanadesAbstract:Abstract Post-combustion carbonate looping processes are based on the capture of carbon dioxide from the Flue Gases of an existing power plant in a circulating fluidized bed reactor (CFB) of calcium oxide (the carbonator) particles. The calcination of calcium carbonate in a new oxy-fired CFBC power plant regenerates the sorbent (calcium oxide particles) and obtains high purity carbon dioxide. This communication presents experimental results from a small test facility (30 kWt) operated in continuous mode using two interconnected CFB reactors as carbonator and calciner. Capture efficiencies between 70 and 97% have been obtained under realistic Flue gas conditions in the carbonator reactor (temperatures around 650 °C). The similarity between process conditions and those existing in CFBC power plants should allow a rapid scaling up of this technology. The next steps for this process development are also outlined.
-
capturing co2 from combustion Flue Gases with a carbonation calcination loop experimental results and process development
Energy Procedia, 2009Co-Authors: J C Abanades, M Alonso, Nuria Rodriguez, Belen Gonzalez, G Grasa, R MurilloAbstract:Abstract Post-combustion carbonate looping processes are based on the capture of CO 2 from the Flue Gases of an existing power plant in a circulating fluidized bed (CFB) reactor of CaO (the carbonator) at around 650 ∘ C. The calcination of CaCO 3 in a new oxy-fired experimental results from a small test facility (30 kWt) operated in continuous mode using two interconnected CFB reactors as carbonator and calciner. Capture efficiencies between 70 and 97% have been obtained under realistic Flue gas conditions in the carbonator reactor. The similarity between process conditions and those existing in CFBC power plants should allow a rapid scaling up of this technology.