Stack downward - Zero emission fuel-fired power plants concept

There exists sewerage system for biological wastes in cities and towns, however there are no such systems for technological and energy wastes, released to atmosphere. The real harm to atmosphere and our lungs is evident. A method of evaluation of CO2 release from fuel-fired power plants and boiler houses based on exergy efficiency is presented. The incremental cost of CO2 emission reduction is calculated. The main subject of paper is a zero-emissions power plant. The plant is based on air separation unit, combustion of arbitrary fossil fuel in the mixture of oxygen/carbon dioxide, expansion in CO2 turbines (240/60 bar, 600 degrees C and 60/4 bar, 1200 degrees C), CO2 compression and condensation, sequestering of liquid CO2 in a deep aquifer through depleted gas/oil wells (stack downward). Essentially new, very efficient power plant cycle is presented. It is referred to as quasicombined due to replacement of ordinary bottoming steam Rankine cycle by the topping one, using the same CO2 as a working substance. The detailed cycle computer simulation (made by Zvagolsky and Gavrilenko) along with the thermodynamic properties of combustion products calculations is discussed. The case studies of the most beneficial versions, such as the use of negative price fuels (used lubricants with forbidden emissions), oil refinery residuals, oil enhancement recovery power/CO2 supply are the subjects for demonstration. The utility-scale power plant COOPERATE (CO2 Prevented Emissions Recuperative Advanced Turbines Energy) cycle is outlined. The injection of the CO2 technology, well known in oil recovery should be used for sequestering of power plant effluents. The hydrolithosphere capacity to store CO2 is guessed. It seems to be thousand time greater than that of atmosphere. The reliable protection of our lungs from any harm forever due to the development of sewerage system of energy wastes could be achieved. Had the concept been successful, the demand of oxygen production units would have increased manifold.