Flue Gas Desulfurization by a Powder‐Particle Spouted Bed

Abstract

The powder-particle spouted bed process is one of the semi-dry processes that have been developed for flue gas desulfurization. In this study, which is designed for SO 2 removal by a powder-particle spouted bed, the reaction term is included in one-dimensional and streamtube models that were presented previously for spouted beds. Hydrated lime is used as the sorbent in this process. The predictions of the models are compared with some published experimental data and it is found that the developed models are valid. The results of two models are compared with each other and their various properties are evaluated. The effects of different operating conditions on SO 2 removal efficiency are also investigated and preferred operating conditions are discussed.

Non-isothermal modeling of the flue gas desulphurization process using a semi-dry spouted bed reactor

“…Also the optimum performance of this system is investigated by studying the effects of different parameters such as bed height, molar ratio of sorbent to acid gas (Ca/S) and inlet concentration of SO 2 . bed and then collected by a bag filter (Moeini and Hatamipour, 2008).Several experimental investigations have been reported on this kind of reactor (Ma et al, 2001(Ma et al, , 1999(Ma et al, , 2000Liu and Kato, 2000;Xu et al, 2000) and the results confirm that PPSB has the advantage of higher SO 2 capture efficiency over the conventional existing processes.Mathematical modeling as an attractive and capable technique for performance analysis, scale up and optimization of the PPSB has been considered and employed by several investigators. The first model for this process was developed by Liu and Kato (2000).…”

“…4-6 along with the predictions of the isothermal model of Moeini and Hatamipour (2008). As it can be found from Fig.…”

“…4, nonisothermal model not only predicts the behavior of the system through the bed height correctly, but also is in good agreement with the experimental data. On the other hand, isothermal model of Moeini and Hatamipour (2008) (in its domain) only predicts the trend of variations. The average relative error in their model is about 15%, while in the modified model it is less than 3%.…”

“…Also the optimum performance of this system is investigated by studying the effects of different parameters such as bed height, molar ratio of sorbent to acid gas (Ca/S) and inlet concentration of SO 2 . bed and then collected by a bag filter (Moeini and Hatamipour, 2008).…”

“…Their analysis was based on a single sorbent particle and the predictions of their model were compared with experimental results. Recently Moeini and Hatamipour (2008) used the stream tube model that was proposed by Lim and Mathur (1976) and simulated a PPSB. Their model was based on the assumption of isothermal conditions and used the experimental data of Xu et al (2000) for validation of the model.…”