Characteristics and economic evaluation of a CO2-capturing repowering system with oxy-fuel combustion for utilizing exhaust gas of molten carbonate fuel cell (MCFC)

NOx and SO2 emissions from municipal solid waste (MSW) combustion in CO2/O2 atmosphere

“…It was only when the temperature was higher than or equal to 800 C that the replacement of N 2 by CO 2 reduced NO x emission. In CO 2 /O 2 atmosphere, the decrease of NO x emission was because of the reduction of NO on char surface through the NO/ CO/char reaction [20,21], and the avoidance of the formation of thermal NO x [22,23].…”

Characteristics and economic evaluation of a power plant applying oxy-fuel combustion to increase power output and decrease CO2 emission

“…This feature is fundamentally different from a system that captures CO 2 from flue gas by using a chemical absorbent, in which power output inevitably decreases and its power-selling income decreases [27]. The proposed system is based on GT technologies, and as such it could be easily applied to small scale [28] and medium scale PGSs [29], as well as to large scale PGSs [30].…”

Characteristic evaluation of a CO2-capturing repowering system based on oxy-fuel combustion and exergetic flow analyses for improving efficiency

“…The obtained high temperature gas is used to drive a generator and then cooled in a condenser. Since the main compositions of combustion gas are only H 2 O and CO 2 , the separation of CO 2 gas from H 2 O liquid (condensate) can be physically and automatically performed at the outlet of a condenser in the proposed system 7–15.…”

“…This deteriorates the efficiency of CO 2 ‐capturing power generation system (PGS) and its economics. However, if a CO 2 ‐capturing PGS with significantly high fuel‐to‐electricity efficiency, denoted by η f , can be realized, required fuel consumption to generate the same amount of electric power energy becomes small, and thus required O 2 quantity together with the required power for liquefying the captured CO 2 become small 9, 10, compared with the ones of a conventional TPGS with an ordinary net power generation efficiency (NPGE). Here, the η f is defined as the ratio of the net generated electric power energy to the fuel energy consumed in the CO 2 ‐capturing PGS.…”