Prediction of SO2 removal efficiency for wet Flue Gas Desulfurization

Transposition of wet flue gas desulfurization using MgO by-products: From laboratory discontinuous batch reactor to pilot scrubber

“…On the other hand, this tendency was not observed for the tests performed at high SO 2 concentrations (cycles G, In other words, extremely high SO 2 concentrations in the flue gases favoured desulfurization. This effect was also reported by other studies [22]: the great amount of absorbable SO 2 acts as a driving force for improving desulfurization. Thus, the LG-MgO performance as a desulfurization agent in the worst conditions can also assure 100% removal efficiency as in low SO 2 concentrations.…”

Semi-mechanistic modelling of ammonia absorption in an acid spray wet scrubber based on mass balance

“…General theoretical models were proposed by Glasscock and Rochelle (1989) and Brogren and Karlsson (1997) to model gas absorption in spray regions, but these models require highly complex solutions. Other models developed by Dou, Pan, Jin, Wang, and Li (2009) and Jia, Zhong, Fan, Chen, and Sun (2011) predict removal efficiency using two-film theory and the Nomenclature C NH3;in NH 3 concentration at the inlet port of the scrubber (ppmv) C NH3;out NH 3 concentration at the outlet port of the scrubber (ppmv) D 32 Sauter mean diameter ( b i o s y s t e m s e n g i n e e r i n g 1 3 6 ( 2 0 1 5 ) 1 4 e2 4 influence of chemical enhancement factor and air pollutant concentration, but these models are specific for desulphurisation process or reduction of sulphur dioxide (SO 2 ). Currently, there are limited studies that focus on modelling reactive NH 3 absorption by dilute sulphuric acid in an acid spray tower.…”

Flue gas desulphurization based on limestone-gypsum with a novel wet-type PCF device

“…Provided that the gas-and liquid-side mass-transfer resistances are defined as 1/k G and 1/(H SO 2 Ek L ), respectively, the estimation of which phase controls the mass-transfer can be ascribed to the ratio of gas-side resistance to the total mass-transfer resistance, (1/k G )/(1/K G ). If 1/k G is nearly equal to 1/K G , the mass-transfer is gas phase control and a ratio of (1/k G )/(1/K G ) ≤ 0.1 is the criterion for liquid phase control [13]. According to Table 2, it can be calculated that the ratios of (1/k G )/(1/K G ) are 0.1524, 0.1457, 0.1404 and 0.1362 for droplet sizes of 1500, 2000, 2500 and 3000 m, respectively, indicating that both gas-and liquid-side resistances are important, with the absorption rate likely to be controlled by a combination of gas-and liquidfilm diffusion controls.…”

“…Apart from the SO 2 removal efficiency, another essential parameter in the operation of a wet FGD plant based on limestone-gypsum is the amount of residual limestone in the gypsum because of a good utilization of limestone and a saleable gypsum product of less than 3 wt.% residual limestone [13]. And hence, an experiment was first carried out to test the influence of slurry pH on SO 2 removal efficiency (Á) and residual limestone content in the gypsum (w c /w g ).…”

“…A succession of equations between the SO 2 partial pressure in gas phase (P SO 2 ) and sulphite concentration in liquid phase can be considered [13][14][15][16]:…”