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A catalytic intermolecular carbon electrophile induced semipinacol rearrangement was realized and the asymmetric version was also preliminarily accomplished with 92% and 82% ee. The complex tricyclic system architecture with four continuous stereogenic centers could be achieved from simple starting materials in a single step under mild conditions. [ABSTRACT FROM AUTHOR]

NO is a major air pollutant from coal-fired power plants. A combined removal of SO2and NO is a prospective process. In this paper, the absorption kinetics of NO into weakly acidic NaClO solution was studied in a stirred tank reactor. It was proven that the absorption process occurred under the fast pseudo-mth reaction regime, and the reaction was found to be first-order with respect to both NO and NaClO. When the initial pH value of NaClO solution is 5.5, it has the best performance for NO absorption. The frequency factor and the average activation energy of this reaction were 7.96 × 108 m3/(mol s) and 28.15 kJ/mol, respectively. The absorption rate of NO increased with increasing reaction temperature. [ABSTRACT FROM PUBLISHER]

Abstract: Removal of NO was studied in a lab-scale bubbling reactor. Effects of operation parameters such as pH value, H2O2 concentration, NO inlet concentration and reaction temperature on NO removal efficiency were investigated. The operation parameters included 250–1000ppm NO, 0.5–1.5mol/L H2O2, FeSO4 0.05mol/L, 2–6 pH, 25–70°C. As can be seen from the experimental results, pH value had a great impact on NO removal efficiency. The experimental results indicated that the gas–liquid reaction between NO and Fenton reagent solution was liquid-film controlled as NO inlet concentration exceeded 600ppm. And NO removal efficiency decreased with increasing reaction temperature. [Copyright &y& Elsevier]

Abstract: Dissolution rate of magnesium hydrate for wet flue gas desulfurization was measured by a pH-stat method. It was found that the dissolution rate of magnesium hydrate was controlled by mass transfer. As can be seen from the experimental results, the dissolution rate of magnesium hydrate increases with increasing reaction temperature and stirring speed. Lower pH value is favorable to the dissolution process of magnesium hydrate. And sulfate can promote the dissolution of magnesium due to the formation of bisulfate. [ABSTRACT FROM AUTHOR]

Abstract: The absorption kinetics of NO into aqueous solutions of NaClO3/NaOH was investigated under different experimental conditions in a stirred tank reactor. It is proven that the absorption process is a fast pseudo-mth reaction. The reaction was found to be second-order with respect to NO and first-order with respect to NaClO3. The frequency factor and average activation energy of this reaction were 2.696×106 m3/(mols) and 13.88kJ/mol, respectively. The addition of NaOH to solutions of NaClO3 decreased the absorption rate of NO. And the absorption rate of NO increased with increasing reaction temperature. In this study, the flue gas flow rate almost had little effect on the absorption of NO. [ABSTRACT FROM AUTHOR]