Reactor Engineering Studies on the BiodeNOx absorption process

Kinetics of FeIIIEDTA complex reduction with iron powder under aerobic conditions

“…where r 1 is the produced rate of Fe(II). Most reductive metals t well with the kinetic model (eqn (11)) except Fe powder. Because the total converted Fe(II) comes from not only the Fe III EDTA reduction, but also the Fe powder oxidation when Fe III EDTA is reduced by Fe.…”

“…That is to say, the Fe II EDTA concentration in the solution is not equal to that of total converted Fe(II). So the kinetic equation of Fe III EDTA reduction by Fe powder should be updated based on eqn (11). According to the stoichiometry of eqn ( 9), the Fe II EDTA concentration derived from Fe III EDTA reduction should be two-thirds of the total Fe(II).…”

“…The mechanisms and kinetics of the overall process of absorption in Fe II EDTA system have been studied and reported elsewhere. 11,12 Fe II EDTA can rapidly capture NO in solution to form stable ferrous-nitrosyl complexes based on eqn (1) and (2). 13 But, during the absorption process, Fe II EDTA is easily oxidized to Fe III EDTA by dissolved oxygen from the ue gas (eqn (3)), which can cause a sharp decrease of NO removal efficiency.…”

Two-Stage Chemical Absorption-Biological Reduction System for NO Removal: Model Development and Footprint Estimation

“…C b,Y is zero according to our experimental result, 29 and that of NO could be determined by the equilibrium constant (K) of reaction R1, which follows the van't Hoff equation. 26,34…”

“…The two-stage CABR system is more promising in terms of steady-state operation in industrial application. The mass transfer of NO and O 2 into the Fe(II)EDTA solution, 23,24 kinetics of NO and O 2 reacting with Fe(II)EDTA, 20,25,26 biological reduction kinetics, 17,27,28 and reactor simulation 17,29,30 have been investigated for the kinetics study of the CABR system. However, most of the above work was conducted in lab-scale one-stage CABR system.…”