Under coexistence of water vapor and xygen,So_2 would be oxidized catalytically over activated carbon into sulfuric acid and stored in carb on pores.Adsorption of SO_2 on ctivated carbon is a special process which is different from either pure physical adsorption or fixed-bed operation.Therefore,the design method for adsorption must be different.Some fundamental relationships for evaluation of breakthrough curve for this adsorption phenomena with chemical reaction were setup.A differential reactor was used for adsorption isotherm and kinetic equation measurements,and an integral reactor was used for examining exit SO_2 concentration variation. Additionally,the shape and shitt of the breakthrough profile inside the bed,as well as its variation at the bed exit with time were all predicted．

The multiple steady state features for the simultaneous oxidations of ethylene and carbon monoxide on platinum foil are investigated by experiments.The experimental results illustrate that the maximum number of the stable steady states is two for the specific system. With increasing the concentration of ethylene and ／or carbon monoxide,the ignition temperature increases,but the extinction temperature decreases,the region of operating arameters in which multiple steady states exist enlarges.When the concentration of carbon monoxide or ethylene is higher than some critical value,the reaction System will appear self-sustained,and extinction can not be observed during the experiments.From the analysis on the multiplicity features of the simultaneous oxidations,we know that the multiple steady state features of this system are different from separate ethylene oxidation or carbon monoxide oxidation on the same catalyst．From the multiplicity features of the simultaneous oxidation system the mechanism is found to be parallel reaction,but not consecutive reaction.In addition to thermal interaction,there exists kinetic inhibition between the two reactions.

A general mathematical model is developed to describe the behavior of fixed bed reactor for removing hydrogen sulfide by impregnated activated carbon,and the governing equations are solved by testing-calibration differential-difference ethod.The general chracteristics of the desulfurizing process in a fixed bed reactor are analysed by model simulation.The results show that the average sulfur capacity over the whole reactor can be increased by using smaller desulfurizing agent and by operating at a lower space velocity,but it has nothing to do with the H_2S concentration in inlet gas．

The experimental breakthrough curves of the fixed bed reactor for removing hydrogen sulfide by impregnated activated carbon are obtained under various coditions,and they are in excellent agreement with the simulation results by the athematical model developed in part Ⅰ.It shows that the model can predict the chracteristics of the desulfurization fixed bed reactor very well.

A refined solution theory for solid solubility in upercritical fluid is developed in this paper.For a dilute solution often encountered in heavy solid／fluid binary system,an expression for the chemical potential of solute is obtained by using implifyied OZ equation.The infinitely dilute chemical potential of solute in solution is separated into three parts,the contribution of repulsive force,the contribution of local structure around solute molecule and the long range attraction force in terms of direct correlation function.Concentration effect on the chemical potential of solute is calculated by a modified Wilson model based on Kirkwood-Buffs solution theory.The approach is used to model experimental values for 45 solid／fluid binary systems from literature.The model gives an AAD 11.7％ in contrast with 14.9％ of PR-EOS with vdW-2 mixing rule for all 862 data points and for polar solvent systems the model gives much better results.The partial molar volumes of naphthalene in carbon dioxide predicted by this model are in good agreement with experimetal data．

The pervaporation separation of water-ethylene glycol mixtures was carried out over the full range of compositions at temperatures varying from 60℃ to 80℃,using chemically crosslinked PVA membrane developed in our laboratory.A new version of the diffusion of small molecules in polymeric solids was proposed and the thermodynamic diffusion coefficient equations were derived on the basis of the modified Vigne equations.That version was combined with Lee-Thodos equations,Wilke-Chang equations,Vrentas-Dudas free volume theory，diffusion equations and swelling equilibrium equations,to calculate permeation fluxes of individual components in water-ethylene glycol mixture through crosslinked PVA membrane,which were in good agreement with the experimental values．

Modeling and simulation of thermal bulk polymerization of styrene in CSTR is reported.The influence of polymerization temperature and residence time on conversion,rate of polymerization,relative molecular weight（Mr）and its istribution（MrD),viscosity and density of Product were discussed.The results show that polymerization temperature determines Mr and MrD of product and affects conversion,rate of polymerization and viscosity.The effect of residence time on Mr and MrD of product is weak,but is significant on conversion and density. For production of polystyrene with desired quality,these two important operation parameters should be selected carefully.A mechanism model is established and is in agreement with experimental data.Furthermore,an empirical correlation equation is proposed for the convenience of application.

A new method is presented in this paper for predicting the Murphree point efficiencies of nonideal multicomponent mixtures in distillation.In the method based on the film model,the interphase mass transfer in the bubbling liquid on the distillation tray is calculated in full consideration of highly nonlinear dependence of the transfer fluxes of individual component on mixture composition which changes along the diffusion path in the film.The interfacial area is calculated based on the principle of multiphase turbulence dynamics The calculation results for six multicomponent mixtures show that the new method can not only predict the bizarre point efficiencies of some species,but also give more accurate and reliable theoretical prediction than other existing methods.So the new model proves a better one for predicting the point efficiencies of the nonideal multicomponent distillation systems.

The effects of water-soaking on properties of the fused-iron catalyst for ammonia synthesis were investigated.The results show that both the mechanical strength and catalytic activity of catalyst All0－5Q decline after water-soaking,while its specific surface area and the pore volume increase.Both the water-soluble potassium and water-insoluble potassium exist in the fused-iron catalyst,and usually the amount of the former is far more than that of the latter.Two kinds of potassium ferrites, KFeO_2 and K_1＋_xFe_(ll)O_(17)（x＝ 0～1） were prepared and their leaching processes were investigated respectively.KFeO_2 can be readily hydrolyzed.In contrast to KFeO_2,potassium can not be resdily dissolved out from K_(1+x)Fe_(11)O_(17) by Water.It is suggested that KFeO_2 with KOH,KAIO_2,K_2CO_3,etc belongs to the water-soluble potassium,which occurs mainly on the bounderies of the crystal grains of Fe_3O_4,While K_(1＋x)Fe_(ll)O_(l7)belongs to the water-insoluble potassium,which is uniformly distributed in the grains of Fe_3O_4.Both watersoluble potassium and water-insoluble potassium in the fused-iron catalyst promote the catalytic activity of ammonia synthesis,but the contribution of the former is less than that of the latter.

Experimental results for the axial mixing of fine particles in a binary-solid riser are presented.The measured bimodal RTD demonstrates two types of the axial dispersion of fine par ticles:the dispersion of dispersed particles and the dispersion of clusters.A proposed one-dimen sional two component dispersion model describes the bimodal RTDs very well.The axial Peclet number of the fine particle changes little at the different fractions of coarse particles,gas velocity and solids flux.

Experimental results of the axial and lateral mixing of dispersed fine particles in a binary-solid riser are resented.Using point source tracer injection,the lateral solids dispersion is determined by measuring the solids RTD at different radial positions.A proposed two-dimensional dispersion model describes the measured RTDs satisfactorily.The laterar fine particle Peclet number increases with increasing the fraction of coarse particle and changes little with increasing gas velocity.A correlation of the lateral Peclet number governs the measured experimental data well.

Recirculation rate in the spiral passage of Spray Granulator-Dryer was studied,and the mechanism of thes liding of particles into the spiral passage was inrestigated.Model for the calculation of recirculation rate was established.The recirculation rate was equal to the average volume of particles passing into the spiral passage inlet per unit time times an effective “recirculation coefficient”.The parameters controlling the effective recirculation coefficient and the influence of holdup coefficient were discussed．

The infrared drying characteristics of a wetted glass particle layer are studied numerically and experimentally in this paper.One dimensional motion is assumed.The governing mass and energy transport equations are constructed and solved numericcally by an implicit finite-difference method.Drying characteristic curve,efficiency of energy,time change of average moisture content and temperature are obtained,Comparsion with experimental measurement is found to be good.The drying characteristics are influenced by the spectral distribution and intensity of incident radiation,diameter of particle,and depth of particle layer．The drying rate and efficiency of energy of far-infrared drying are greater than those of infrared drying.

With Glew-Hildebrand saturation technique,aqueous solubilities of Ofloxacin.Nor floxacin and Pipemidic acid are measured at different temperatures by HPLC and artificial neural network technique,respectively.Given to the solubilities of quinolone medicines,a solubility model is proposed by using chemical engineering thermodynamic theory.This model is veritied by experimental and reference data.A new molecular topological index is proposed with extensive distance atrix,which can describe the molecular structures of hetero-atom,multi-bonds and comp1ex-cycle compounds.Finally,the a mode1 relating solubility to molecular structure is ob tained by using the experimental solubility data of these three kinds of uinolones.Based on this model,the solubilities of nine quinolones,such as Fleroxacin,at 25℃ and 37℃ are predicted and the results are in good agreement with experimental data．

The preparation of Cu~(2+)-IDA（iminodiacetic acid）—PEG 20000（polyethylene gly col）was studied.By reacting at 65℃ and adding SOC1_2 by feed batch,the coupling yield of PEG 20000 to PEG 20000—Cl_2 reached 98％.A new metal affinity partition model was developed,by which the correction and prediction for the experimental data were made successfully The relative deviations between predicted results and xperimental data were less than 10％.

The heat transfer and flow friction performance for the flow across tube banks with longitudinal trapezoid fins and rectangle fins are reported,and the difference of the performance between both tube banks is studied.This work analyses the influence of the pitch,fin height and width The different fins（trapezoid and rectangle）result in the difference of performance and by comparison the difference of heat transfer is about-ll％ ～34％,the greatest difference of flow friction is aboutl.2 times The trapezoid fin can gain the lower flow friction and the better com prehensive utilization of energy When banks are in a dense transversal arrangement the longitu dinally finned tube banks have lower flow friction and better heat transfer than the smooth tube bank.

The effects of calcium stearate（CS),sodium dodecyl benzene sulfonate（SDBS）and the ratio of white spirit to gasoline on the stability and particle sizes of poly（acrylamide（AM）-methacryloxyethyltrimethylammonium chloride（MATMAC）prepared by reverse suspension poly merization were studied. The particle size is controlled by the aggregative growth of dispersing droplet which is affected by the dosages of CS and SDBS and the viscosity of the suspending medium.

By applying the configuration-bias vaporization method for the simulation of hquid-hquid equilibria based on lattice model,the liquid-liquid equilibria of three ternary systems with the specified molecular parameters（r_1=1,r_2＝4,r_3=8,ε_(12)=0.333,ε_(13)= 0.556,ε_(23)=00）,（r_1＝1,r_2＝4,r_3=l6,ε_(12)＝0.25,ε_(l3)＝0.50,ε_(23)=-0.10）and（r_1＝1,r_2＝4,r_3＝32,ε_(l2)＝0.25,ε_(13)＝0.50,ε_(23)＝-0.10）,respectively,are obtained.Comparisons between the simulation results and those calcu1ated by Flory-Huggins theory,Freed theory and Hu et els model for the Polymer solution are made.It is shown that Flory-Huggins theory have large deviation from simulated results,while Freed theory and Hu et als model gives much better results．

In the paper,condensation heat transfer of onazeotropic mixtures R_(1l)／R_(1l3)in in-line and staggered 3-row smooth tubes and petal shaped fin tubes was studied under natural convec tive condition.Experimental results showed that,either in-line or staggered,the effect of bun dle for nonazeotropic ixtures in petal-shaped fin tubes was very smaller,at the same condition,it averge condensation heat transfer coefficient is l.5-5 times larger than of smooth tubes.