Abstract
In this study, a combined cycle gas turbine (CCGT) power plant and a CO2 capture plant have been modelled in GateCycle® and in Aspen Plus® environments respectively. The capture plant model is validated with experimental data from the pilot plant at the University of Texas at Austin and then has been scaled up to meet the requirement of the 427 MWe CCGT power plant. A techno-economical evaluation study has been performed with the capture plant model integrated with flue gas pre-processing and CO2 compression sections. Sensitivity analysis was carried out to assess capture plant response to changes in key operating parameters and equipment design. The study indicates which parameters are the most relevant (namely absorber packing height and regenerator operating pressure) and how, with a proper choice of the operating conditions, both the energy requirement for solvent regeneration and the cost of electricity may be reduced.
Highlights
1.1 Background and Motivations Carbon Capture and Storage (CCS) is regarded as an essential technology to meet greenhouse gases reduction goals [1]
A combined cycle gas turbine (CCGT) power plant and a CO2 capture plant have been modeled in GateCycle® and in Aspen Plus® environments respectively
The capture plant model is validated with experimental data from the pilot plant at the University of Texas at Austin and has been scaled up to meet the requirement of the 427 MWe CCGT power plant
Summary
1.1 Background and Motivations Carbon Capture and Storage (CCS) is regarded as an essential technology to meet greenhouse gases reduction goals [1]. Accurate modeling constitute a stepping-stone to increase confidence about CO2 capture process In this perspective, rate-based modeling procedure adopted by the Authors constitute, when compared to equilibrium based calculations, a superior solution in terms of accuracy and sensitivity to changes in the operating parameters. Rate-based modeling procedure adopted by the Authors constitute, when compared to equilibrium based calculations, a superior solution in terms of accuracy and sensitivity to changes in the operating parameters In addition to this pilot plants currently existing or, even more, large scale demonstration projects currently being built, are limited in the range of parameters that can be changed. Summarizing, the main novelties of this article are: a. extensive validation campaign of capture plant at pilot plant scale combined with commercial scale modeling and simulation b. capture plant operating conditions and design parameters sensitivity analysis
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