Oxidation Rate of Magnesium Sulfite Catalyzed by Cobalt Ions

Abstract

Oxidation of magnesium sulfite is important for recycle of byproduct in the magnesium desulfurization. The oxidation rate of magnesium sulfite, prepared by vacuum evaporation method, was investigated in a bubbling tank in presence of transition metal catalysts, which shows cobalt is the most effective. The general reaction orders with respect to cobalt, magnesium sulfite, and oxygen are 0.44, 0, and 0.46, respectively, and the apparent activity energy is 17.43 KJ·mol. The catalytic performance of cobalt compared with other metals was also analyzed employing the ion potential theory. Integrated with the three-phase reaction model, we inferred that the general oxidation rate of magnesium sulfite is controlled by mass transfer of oxygen. Further, the intrinsic kinetics was predicted, indicating that the reaction orders with respect to cobalt and oxygen are 1.0 and 0, respectively. The results are helpful for the recycle of magnesium sulfite in magnesia desulfurization.

Removal of SO2from Flue Gas Using Basic Aluminum Sulfate Solution with the Byproduct Oxidation Inhibition by Ethylene Glycol

“…First, the chain starts with the formation of the • SO 3 – radical, which usually occurs on the conditions of light or transition metal ion presented by eqs and . , Accordingly, the • SO 3 – radical can triggering a series of chain reactions.chain initiation chain propagation product formation chain termination Then, EG will act as the • SO 3 – radical-trapping material and break the chain by reacting with the • SO 3 – radical (eq ). ,, Finally, EG may generate aldehyde or carboxylate as a result of an induced oxidation of EG. …”

“…First, the chain starts with the formation of the • SO 3 − radical, which usually occurs on the conditions of light or transition metal ion presented by eqs 8 and 9. 14,22 Accordingly, the • SO 3 − radical can triggering a series of chain reactions. chain initiation…”

Construction of Confined Bifunctional 2D Material for Efficient Sulfur Resource Recovery and Hg2+ Adsorption in Desulfurization

“…In the previous research, we have confirmed that the synergetic oxidation reaction and mercury removal were controlled by both the properties of scaffold materials (e.g., pore structure, specific surface area, etc.) and dispersion of active sites. , Heterogeneous Co-based catalyst (especially compare with other transition metals), such as Co-SBA15, Co-TiO 2 , and Mn@ZIF67, etc. featuring 3D mesoporous and dispersed Co sites, were effective candidates to break through the balance via accelerating the free radical reaction and sulfite oxidation process.…”

“…and dispersion of active sites. 14,15 Heterogeneous Co-based catalyst (especially compare with other transition metals 16 ), such as Co-SBA15, 5 T h i s c o n t e n t i s Co-TiO 2 , 17 and Mn@ZIF67, 9 etc. featuring 3D mesoporous and dispersed Co sites, were effective candidates to break through the balance via accelerating the free radical reaction and sulfite oxidation process.…”

Co2O3 Catalyzed Oxidation of SO2 in Aqueous Solution Differing Effect of Benzamide in Alkaline Medium

“…The metal oxides are released to the atmosphere as a result of combustion processes are therefore important constituents of suspended particulate matter. The catalytic role of several metal oxides such [3][4][5][6][7][8] as CoO; Co 2 O 3 ; Ni 2 O 3 ; CuO; MnO 2 and Cu 2 O; waste product of water treatment plants containing 9,10 CaO cobalt ions 11 and carbon nanotubes 12 , transition metal catalyst 13 and cobalt based molecular sieves 14 has been reported. Conklin and Hoffman 15 proved that the liquid phase oxidation of SO 2 has been established as a major pathway in the biogeochemical sulfur cycle and in the production of acidity in the atmosphere.…”