Absorption of sulfur dioxide into aqueous reactive slurries of calcium and magnesium hydroxide in a stirred cell

The rheological behavior and stability of Mg(OH)2 aqueous suspensions in the presence of sodium polyacrylate

“…Magnesium hydroxide, especially in the suspension form, has recently attracted more and more attention and is widely applied as neutralizing agents [1,2], and acidic gas absorbents [3][4][5]. It is also recognized as an excellent material used in wastewater and industrial effluent treatment to absorb heavy metals [6,7] and organic contaminants [8].…”

Modeling and Simulation of a Bubbling SO2 Absorber with Granular Limestone Slurry and an Organic Acid Additive

“…The main reaction steps are: Diffusion of SO 2 through the gas film (1) Reactions (3), (4), (11), and (12) are very fast [15], and reactions (5), (8), and (9) are even faster than reaction (3), since they are based on simple proton transfer and are therefore regarded as instantaneous. Consequently, instantaneous equilibrium is assumed for reactions (3), (4), (5), (8), (9), (11), and (12) throughout the liquid film. So, the resistance is the diffusion of SO 2 and limestone dissolution in the liquid film.…”

“…Accordingly, the film model for the reaction was made up of two regions considering Eqs. (11) and (12), but without considering Eq. (13).…”

“…Mehra examined the process of particle dissolution near the gas-liquid interface and pointed out that the change of particle size should be accounted for when the particles were small enough for significant dissolution [10]. Dagaonkar and Beenackers et al studied the enhancement of the mass transfer due to the presence of fine particles, which increased with the solid concentration in the system SO 2 -Ca(OH) 2 [11]. All of these models were based on the film model and proposed the existence of two reaction planes to successfully explain the SO 2 absorption rate.…”

Cleaner production in the ammonia–soda industry: an ecological and economic study

“…Fumes created during the combustion of coal samples were absorbed in the flushing with the distiller waste sample placed inside (the equipment used was similar to that described by Dagaonkar et al (2001)). …”