实验研究了废大理石粉作为脱硫剂的湿法烟气脱硫工艺，分析了其吸收SO2的传质反应机理。试验了不同液气比（L/G）、吸收浆液pH值和进气SO2浓度等主要参数对脱硫率的影响，并对实验结果进行了分析。结果表明，选择以下操作条件较为适宜：pH0=515～615，L/G=3L/m3，a=2%；以上工艺条件下，在进气SO2浓度为1000ml/m3时，脱硫率达60%以上。本文还讨论了废大理石粉作为脱硫剂的工业应用前景。

Ag+-exchanged resins are prepared and studied for ethylene/ethane separation by adsorption. On Ag+-exchanged S9, at 25℃ and 0.1013MPa, the equilibrium adsorbed amount for C2H4 is 0.992mmol.g-1, and the adsorption ratio for C2H4/C2H6 is 3.56. The adsorption capacity can be restored almost completely at 25℃ and 75℃, and the desorption residual amount is less than 0.01mmol.g-1. For the adsorption consisting of physical adsorption and 7r-complexation with energy heterogeneity, the equilibrium data are correlated with Langmuir-FYeundlich isotherm equation. Furthermore, the heat of adsorption and the overall diffusion time constants are calculated from the experimental data. Considering all the adsorption characteristics, the application potential for industrial adsorption process is discussed.

The flow field of gas and liquid in a ф150mm rotating-stream-tray (RST) scrubber is simulated by using computational fluid dynamic (CFD) method. The simulation is based on the two-equation RNG k-ε turbulence model, Eulerian multiphase model, and a real-shape 3D model with a huge number of meshes. The simulation results include detailed information about velocity, pressure, volume fraction and so on. Some features of the flow field are obtained: liquid is atomized in a thin annular zone; a high velocity air zone prevents water drops at the bottom from flying towards the wall; the pressure varies sharply at the end of blades and so on. The results will be helpful for structure optimization and engineering design.

Forced oxidation of calcium sulfite aqueous slurry is a key step for the calcium-ba sed flue gas de sulfurization (FGD) re sidue. Experiments were conducted in a semi-batch system and a continuous flow system on lab scales. The main reactor in semi-batch system is a 1000ml volume flask. It has five necks for continuous feeding of gas and a batch of calcium sulfite solutionPaqueous slurry. In continuous flow system, the main part is a jacketed Pyrex gla ss reactor in which gas and solutionPaqueous slurry are fed continuously. Calcium sulfite oxidation is a series of complex free2radical reactions. According to experimental re sults and literature data, the reactions are influenced significantly by mangane se as catalyst. Atlow concentration of mangane se and calcium sulfite, the reaction rate is dependent on 115 order of sulfite concentration, 015 order of mangane se concentration, and zero order of oxygen concentration in which the oxidation is controlled by chemical kinetics. With concentrations of calcium sulfite and mangane se increa sing, the reactions are independent gradually on the constituents in solution but are impacted by oxygen concentration. Mangane se can accelerate the free-radical reactions, and then enhances the mass transfer of oxygen from ga s to liquid. The critical concentration of calcium sulfite is 01007molPL, mangane se is 10-4 molPL, and oxygen is of 012-014atm.