Abstract
Among the technologies which allow to reduce greenhouse gas emissions,
mainly of carbon dioxide, special attention deserves the idea of
'zero-emission' technology based on boilers working in oxy-combustion
technology. In the paper a thermodynamic analysis of supercritical power
plant fed by lignite was made. Power plant consists of: 600 MW steam power
unit with live steam parameters of 650°C/30 MPa and reheated steam
parameters of 670°C/6 MPa; circulating fluidized bed boiler working in
oxy-combustion technology; air separation unit and installation of the
carbon dioxide compression. Air separation unit is based on high
temperature membrane working in three-end technology. Models of steam
cycle, circulation fluidized bed boiler, air separation unit and carbon
capture installation were made using commercial software. After
integration of these models the net electricity generation efficiency as a
function of the degree of oxygen recovery in high temperature membrane was
analyzed.
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