Furthermore, the transfer area of heat recovery exchanger and the draft fan work increment due to the flue gas pressure drop are analyzed.
Moreover, earlier patents tend to focus on the gas processing industry and it is not immediately clear whether the same benefits can be extended to CO2 capture from near atmospheric pressure flue gases.
It is found that optimal operating conditions are 30 bar, 30.42 °C, −24.64 °C, and −55 °C for multi-stage CO2 compressor discharge pressure, flue gas temperature after compression, first flash separator temperature, and second flash separator temperature, respectively.
However, it is also quantitatively observed that the significance of boundary layer reaction reduces notably with the reduction of oxygen concentration in the flue gas, operational pressure and film thickness.
The model, validated with historian data and design data, was used to evaluate the air and flue gas system pressure fluctuations in response to upsets such as fan trips and runaways.
CO2 concentration, temperature and pressure of flue gas streams are main operating parameters based on which suitable separation process can be selected.
The results show that DGA is the best solvent with minimum energy requirement for recovery of CO2 from flue gases at atmospheric pressure.
One can supply heat to each cold stream using heating utilities such as steam of various pressure levels, flue gas from furnace, and so on.
In the gas-fired power plant case the absorber needs to be designed to process high volumes of flue gas and the pressure drop will often be higher than for a coal-fired power plant due to higher gas velocity.
MC mixing chamber, M mass flow meter, P pressure gage, FGA flue gas analyzer.
The utilization of membrane technology in post-combustion applications is hindered by low CO2 feed partial pressure in the flue gas stream.
