An experimental apparatus for the measurement of gas-solubility in 1, 2,4-trimethylbenzene was established. The solubility data of pure hydrogen Chloride and chloromethane in the ranges of 293.15-323.15 K and 6-130 kPa and those of the mixture at 298.15 K were obtained and correlated with modified Henrys equation.The activity coefficients were calculated with Margules equation. The solubilities of hydrogen, nitrogen, carbon monoxide, argon, methane, hydrogen chloride and chloromethane at 298.15 K and 101.3 kPa were also observed.Results obtained compared well with those from the Scatchard-Hildebrand theory, except the solubility of hydrogen.

Oxygen transfer in a flat pJate membrane oxygenator is being studied. A mathematical model for the Cassonian fluid (or Newtonian fluid)convec-tive mass transfer with reversible instantaneous oxygenation is presented. Finite-difference technigue is used to solve the nonlinear boundary-value problem concerned. Calculations indicate that not much difference can be realized between Cassonian and Newtonian fluids. For Newtonian fluids, calculated values of physical absorption conform very well with data given in literature. Experimental studies of the oxygenation of pig blood was undertaken, and results obtained were checked with calculated values, both by treating the hog blood as a Cassonian fluid and as a Newtonian fluid. Close correlations were obtained between the experimental achievement and the calculated values. It was, therefore, concluded that pig blood could be safely treated as a Newtonian fluid.

An isobaric vapor-liquid equilibrium apparatus for elevated pressures was designed and made by the authors. The isobaric vapor-liquid eqilibrium data of three binary systems(isobutene-isoprene,isobutene-chloromethane and isoprene-chloiomethane) and a tertiary system (isobutene-isoprene-chloro-methane at l0.3bar were determined with this apparatus. Experimental data obtained correlated satisfactorily with Martin-Hou Equation of State(81).

An one-dimensional mathematical model for fluidized-bed electrode, is presented Exact solution in closed from for over potential distribution are obtained for a single oxidation-reduction reaction under activated control with charge transfer coefficients of 1/3,1/2,2/3 respectively. Polarization equations for reactions under activated control, diffusion control, mixed control and/or with side reactions occurring are derived for random charge transfer coefficients accompanied by rather high dimen-sionless resistance parameter. Results thus obtained may be used for the description of behaviours in flooded porous electrodes and tubular electrodes. Parametric effects on current efficiency was discussed.

Unsteady state heterogeneous diffusion-reaction mold has been considered as a good tool for simulating fluid-solid reaction. Shrinking core model, two-stage model, and homogeneous modle, which have been widely used, are actually special cases in this category. Low recovery of vanadium from slags of high calcium contents through leaching with water was well noted. Leaching with solium carbonate and/or sodium bicarbonate solutions, however, will enable over 80% of vanadium to be recovered. Leaching kinetics and physical properties of the calcined products before and after leaching are experimentally investigated. Experimental results can be satisfactorily explained by the implementation of the unsteady state diffusion-reaction modle. The reaction of two solutes with two solid components, with the formation of a solid product which blocked part of the vanadium surface from entering into reaction, has been taken care of in the derivation of the model. The mold equations, which are a set of nonlinear partial differential equations, may be solved by emplaying the orthogonal collocation and the semi-implicit Runge-Kutta method. Parameters are estimated by the complex method.

The vertical density profiles of the gas-liquid mixture on the guide-sieve trays and normal sieve trays were measured through gamma ray absorption technique. The effects of factors on the mutual transition of different flow regimes were studied. It is found that inflection points of entrain-ment rate can be regarded as the criteria of transition of the flow regimes and the opretational range between two inflection points as being the transition regime. Mathematical correlations for tray hold-up(or clear liquid height), average dispersion density and transition of flow regimes are given.

An approach to perturbation theory of fluids (including liquids and dense gases) is described. Two equations of state for hard particle reference fluid are series representations. These are obtained from a new radial distribution function For hard spheres, the three-term truncated form of the equations are the same as the pressure and the compressibility equation of state given by the Precus-Yevick theory. The molecular potential of real fluid is approximated with a number of square-well nonspherical potentials and the higher-order perturbation terms are obtained by using generalized Barker-Henderson approximation. A formula for the thermodynamic properties of multi-square-weii nonspherical potential hard particle perturbation is being derived.

The molten rheological properties of chloro-polyether and polyepichlo-rohydrin blends with a coupling agent and without coupling agents, were studied. It was found that coupling agents affect the pseudoplastic behayior of the blend melts. Shear stress-shear rate data of the blends at different temperatures constitute "master curves" at constant blending composition, when plotted as τ vs aTγ, and τ-γ data of the blends within a certain range of composition also constitute "master curves", when plotted as τ vs aTaφγ. A rheological equation which describes the relationship between viscosity and shear stress of the blends was established.

The present paper describes a study on the evaporation in a horizontal tube spray film evaporator. Single tubes, either electrically heated or steam heated, are used for the study. Two types of tube surface properties are considered, namely an electro-chemically etched porous tube surface and a smooth tube surface. The latter also serves as a reference De-ionized water is used as working fluid. Liquid feed rate, changes in the rate of heat flux, annealing treatment of the porous tubes and steam velocity in the tube are explored as operational variables. Compared with smooth tubes and pool boiling, porous tubes proved to give much better performance as such tubes tended to promote nucleate boiling of the film.

Based on diffraction theory, the determination of the gas-liquid specific interfacial areas in horizontal agitated vessels by laser transmission method is discussed and analysed. Better reliability and good accuracy are claimed with laser measurements than with normal light. Studies on specific inter-facial areas in horizontal vessels provide valuable suggestions for the design of polymerization vessels. Increasing the ratio of impeller diameter may prove to be a reasonable approach for enhancing gas-liquid contact. Furthermore, addition of small amounts of surface-active agents may bring about 10 to 25 times in specific interfacial areas.

In this paper, the mass transfer problem of laminar natural convection for non-newtonian power-law fluids was studied. Several differential equations had to be solved for this purpose. The power-law model was adopted as an constitutive equation. An asymptotic solution, represented in dimen-sionless form by the relation among Sherwood number Sh and power-law Grashof number Gr and power-law Schmidt number Sc was given: Under the special condition(n = l), the asymptotic solution turned out to be similar to that for Newtonian fluids. Experiments were carried out with an electrochemical method. CuSO4-H2SO4-PAM(polyacrylamide) system under natural convection at vertical electrodes was studied through the current/voltage curve, which gave the limiting current and the mass transfer rate. A comparison betwene theoriti-cal results and electrochemical experiment data was made, it was found that, apparently asymptotic solutions conformed very well with electrochemical experimental data.

The analytical expression of NusseJt Number is obtained by direct integration of the differential equations of momentum, energy and mass in circular tubes, with the application of equations of eddy viscosity e0/v and the ratio of the eddy diffusivities mn = αt/∈α, which were published in recent-years. Petukhovs Nusselt number expressions have been compared with the Nusselt number expression derived. The maximal deviation is found to be less than 7%. This Nusselt number expression can also apply to metal liquids with very low Pr number.

Non-uniform distribution of valve tray entrainments on the tray efficiency has been systematically investigated. This effect arises from the existence of concentration differences along the liquid flow path on the tray. A model is given for the prediction of apparent tray efficiency for various forms of entrainment distribution along the liquid flow path on the tray. It is reasonable to have the non-uniformity of distribution of entrainment expressed as the relative ratio of the first order moments of both halves of the entrainment distribution function about the center line of the tray. In general, with more entrainment distributed at the liquid outlet region of the tray, the apparent tray efficiency is reduced and this effect is enhanced by increases in Peclet number, stripping factor, entrainment fraction and point efficiency. Apparent tray efficiency predicted on the assumption of uniform distribution of entrainment is either under-estimated (approximately up to 5% with entrainment predominating at the inlet tray area), or over-estimated (up to 8% with entrainment predominating at the outlet tray area). The moment data of the valve tray is given by empirical correlation based on experimental work done by the authors. Experiments are carried out over a wide range of tray conditions.