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An approximate method is often applied to solve the differential mass conservation equations, of which the solution by exact analytical methods is impossible. The methodology developed in this work is based on an approximate method for decoupling the gas conservation equation. With this strategy, the calculation of gas concentration and solid conversion at any time and position can be converted to...
Adsorption experiments of vapor-phase elemental mercury (Hg0) were carried out by using modified bentonite/chitosan in a laboratory-scale fixed-bed reactor. VM3000 online mercury analyzer was applied to detect the inlet and outlet mercury concentrations. The characterizations of the sorbents were analyzed using the method of nitrogen (N2) adsorption-desorption, Thermal gravimetric analysis (TGA) and...
To reveal the formation mechanism of NO during coal combustion under O2/CO2 atmosphere, pyridine, as a nitrogenous model compound of coal, was combusted in a horizontal furnace. The influences of oxygen excess coefficient, CO2 concentration and combustion atmosphere on the release of NO was studied. The concentration of CO, NH3 and HCN in flue gas were also measured and analyzed in detail. Under reducing...
Evolution characteristics of particle pore structure not only reflect reactive process, but also intensify the complicated degree of the reaction. Variation of pore structure in coal char particles is too complex to be described only by the invariable structure parameter ?? when the random pore model (RPM) is used to describe reaction process. In this paper, the structural parameter ?? in random pore...
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