SIMULATION OF SEIZING CARBON DIOXIDE EMITTED FROM SIMPLE GAS TURBINE AND COMBINED CYCLES POWER PLANTS

Abstract

ABSTRACT

It is well known that carbon dioxide is one of the major pollutant agents to our environment, and its emission must be limited. Power plants mostly burn fossil fuel to generate electricity and hence produce a tremendous amount of pollutants such as CO₂. In this work, a simple gas-turbine cycle is connected with a steam cycle unit to form a combined gas-steam power unit and hence, improves its thermal performance. Since testing at large scale is so costly, it is likely to use process simulation software to evaluate such processes. Post-combustion removal is one possible way to lower CO₂ emissions from industrial plants, including power stations. Instead of discharging CO₂ which is contented in the exhaust gas to the atmosphere, the carbon dioxide can be seized, transported and stored securely in a number of places, including geological formations, and depleted oil and gas reservoirs. The most favorable method for CO₂ removal is by absorption in an amine-based solvent followed by desorption. The simplest and most used amine for CO₂ removal is MEA (Mono-Ethanol Amine). The net power output of the selected simple-gas turbine unit for the analysis is 287.4 MW with thermal efficiency of 28.98%. Modeling and simulating this power unit indicates 40.7851 kg/s of CO₂ is emitted to the atmosphere. The aim of this work is to reduce this amount and contribute to the clean environment issues. According to this study, the rate of the emitted CO₂ is reduced to 0.3888 kg/s, and to 0.4085 kg/s, when CO₂ removal cycle is connected to the simple gas turbine cycle and to the combined gas-steam cycle, respectively. https://jer.ly/PDF/Vol-35-2023/JER-04-35-Abstract.php?f=a