This chapter presents the costs for capturing CO2 with the help of O2/CO2 combustion process, which is required to different types of fuels and boilers.
One such technology is the O2/CO2 combustion process (also termed oxy-fuel combustion) that combines a conventional combustion process with a cryogenic air separation process so that the fuel is burned in oxygen and recycled flue gas, yielding a high concentration of CO2 in the flue gas, which reduces the cost for its capture.
Open image in new window Fig. 2 Combustion process flowchart.
The results of free boundary problems have been used in the modeling many practical problems, such as wound healing [20], the combustion process [21], the American option pricing problem [22], the chemical vapor deposition on a hot wall reactor [23], image processing [24], tumor growth [25, 26], and so on.
In this paper, the performance of a novel ex-framework FeZSM-5 catalyst for direct N2O decomposition in simulated tail-gas from nitric acid plants (containing O2, NOx, and H2O) and combustion processes (containing O2, CO2, H2O, and SO2) is presented.
Open image in new window Fig. 1 Flow chart of Dy2O3 nanoparticles preparation by combustion process 2 Dy NO 3 × 5 H 2 O + 3 C 2 H 5 NO 2 + 3 H + + 3 e - → Dy 2 O 3 + 6 CO 2 + 9 / 2 N 2 + 19 H 2 O (1).
A wide range of experimental conditions (e.g. 250 350 °C, 0 5 vol% O2, 0 500 ppmv NO2, 0 5 vol% H2O) were considered in order to investigate the role of NO2, O2 and H2O in the combustion process.
Three main conclusions were drawn: (1) the combustion process was much slower if compared with conventional burner technology, and hydrocarbons, hydrogen, and carbon monoxide were measured far downstream into the furnace, (2) high and uniform radiative heat fluxes were observed, and (3) novel simplified chemistry models applicable to this new combustion conditions are required.
As can been seen in Figure 4a, the combustion process left behind a carbonaceous residue, which was easily washed off from the surface to obtain the desired biofilm-free substrate (as shown in Figure 4b).
The porous feature of agglomerates is also attributed to the liberation of a large amount of gas such as NH3 during the combustion process [24].
As studies [13] and [14] show the combustion process of gaseous fuels in a bubbling fluidized bed in the temperature range of 300 1000°C is carried out at a certain height above the distributor.
