Analiza procesu membranowej separacji CO₂ W supernadkrytycznym bloku weglowym

In this paper the influence of the CO₂ separation system on the efficiency of a coal power plant was presented. For the analysis the pulverized coal power plant with the electric power rating at 900 MW and net efficiency equal to 45.46% was chosen. The analysis of the selection of a structure of the membrane module, pressure and the membrane surface area for CO₂ recovery ratio and CO₂ purity was performed. Two stage membrane module was proposed. This system allows to obtain CO₂ purity at 0.9 and 90% separation degree of the total CO₂ emission in the power plant. The analysis of the energy consumption of the CO2 membrane separation and CO₂ compression process for its liquefaction was conducted. Such a CCS installation requires supply of the energy at the level of 142.36 MW (74.45 MW for the membrane separation and 67.91 MW for the CO₂ compression) which corresponds to the energy intensity of the process equal to 0.94 MJ/kgCO₂. It will decrease the electricity generation net efficiency to the level of 38.27%.