摘要:

AbstractThis series of papers presents an analysis of the rate of evaporation of a spray which is injected into a cylindrical column, the walls of which are maintained at a high temperature. The method is an extension of the Hottel‐Cohen analysis of the radiant heat transfer to an absorbing gas of non‐uniform temperature1and permits the calculation of the magnitude and distribution of the heat flux at the wall.The present paper discusses the difficulties inherent in the calculation of the absorption of thermal radiation by clouds of particles suspended in an absorbing gas medium. Approximations to the intractable exact solution are made to permit the calculation of the absorption strength of spray from operating conditions and the properties of the atomized liquid.The various reception factors for the cylindrical system have been accurately determined as a function of the combined absorption strength of spray and medium. The use of these factors in the present system is discus

ISSN:0008-4034    

DOI:10.1002/cjce.5450390502

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1961

数据来源: WILEY

摘要:

AbstractThis paper describes an apparatus for the measurement of the light transmittance of emulsions. A photoelectric technique was employed to determine the effect of flow rate, mixing time, and dispersed phase concentration on the light transmittance of a liquid‐liquid emulsion composed of a commercial petroleum solvent and water. For a given concentration, light transmittance was independent of flow rate and became constant after 10 minutes of mixing in the test apparatus. Light transmittance decreased with solvent (dispersed phase) concentration. Up to 5% solvent concentration, the light transmittance‐concentration curve could be used to measure solvent concentration accurat

ISSN:0008-4034    

DOI:10.1002/cjce.5450390503

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1961

数据来源: WILEY

摘要:

AbstractIrreversible first‐ and second‐order reactions are studied for combinations of tubular and CST reactors when endothermal or exothermal adiabatic conditions prevail.Typical results presented forMTandTMmodels show the variation of either the conversion or the relative residence time as a function of the mixing level of the system.A graphical method, applicable generally toMTreactors, provides a simplification over that of successive approximations required for modelTM.For the conditions investigated broad limits are indicated of the optimum reactor combinati

ISSN:0008-4034    

DOI:10.1002/cjce.5450390504

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1961

数据来源: WILEY

摘要:

AbstractA method is proposed for computing the speed of sound in a non‐ideal gas based on the approximation\documentclass{article}\pagestyle{empty}\begin{document}$$ \left({\frac{{\partial H}}{{\partial E}}} \right)_s \cong \frac{H}{E} $$\end{document}In conjunction with the usual generalized compressibility plot and an analogous reduced enthalpy correction plot, it can be used near the critical point of a non‐dissociating gas. The method is also applicable to highly dissociated and ionized ga

ISSN:0008-4034    

DOI:10.1002/cjce.5450390505

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1961

数据来源: WILEY

摘要:

AbstractRates of oxidation of toluene were measured as a function of temperature and reactant concentration. A fixed bed reactor was operated at low conversions over the following range of conditions, 300°C to 350°C., 1 × 10−3to 15 × 10−3moles oxygen per litre of gas, and 1 × 10−3to 6 × 10−3moles toluene per litre of gas.The rate data for the oxidation of toluene were correlated by the following equation, which is based on a model by Hinshelwood.\documentclass{article}\pagestyle{empty}\begin{document}$$ r_s = \frac{{k_a k_l C_t C_o }}{{k_a C_o + Nk_l C_t }} $$\end{document}The values ofk, obtained agree with those reported previously for naphthalene oxidation(1).It is concluded that the Hinshelwood model is a useful one for this type of reaction, and within the limits of available data provides a satisfactory i

ISSN:0008-4034    

DOI:10.1002/cjce.5450390506

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1961

数据来源: WILEY

摘要:

AbstractDigital computer methods are developed for evaluating equilibrium data from total pressure‐liquid composition measurements of volatile binary non‐electrolyte mixtures. The Redlich‐Kister equation is employed for representing liquid activity coefficients. The constants B, C and D are evaluated by the method of least squares for non‐linear formulas. Equilibrium vapor compositions are also evaluated by means of a step‐wise integration procedure. A comparison of both methods is

ISSN:0008-4034    

DOI:10.1002/cjce.5450390507

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1961

数据来源: WILEY

摘要:

AbstractThe mechanism of flow of air and water through packed glass fibres has been studied. Pressure drops and liquid hold ups were measured as a function of gas and liquid flow rates and the packing characteristics. It has been found that the pressure difference measured is dependent upon the history of previous gas and liquid flow rates in the bed. The liquid hold up is defined entirely by the gas and liquid flow rates. An analysis of the flow mechanism shows that the capillary forces interact with the fluid pressures in the bed. For example an increase in gas flow rate followed by a reduction to the same flow rate has been shown to reduce the resistance of the bed to gas flow even though the liquid flow rate is unchanged. A measure of the irreversibility of the flow operation is suggested.

ISSN:0008-4034    

DOI:10.1002/cjce.5450390508

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1961

数据来源: WILEY

摘要:

AbstractPowders of silver catalyst of low calcium content and an 8.5% calcium in silver alloy were pelletized at different compacting stresses. The diffusibility of each pellet was measured, using hydrogen, and correlated with internal void volume, The surface area of the powders and of some representative pellets was obtained by nitrogen adsorption. All these parameters were used in an attempt to interpret the changes taking place with decreasing porosity. With the help of two plausible assumptions it was concluded that the tortuosity remained constant over the range examined. The figures obtained have limited usefulness for the prediction of approximate pellet diffusibilities from a knowledge of the compacting stresses applied to similar metal powders.

ISSN:0008-4034    

DOI:10.1002/cjce.5450390509

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1961

数据来源: WILEY

摘要:

AbstractComputers as tools for the chemical engineer have begun to revolutionize his concepts of reaction kinetic analysis, of plant design methods, and of plant control systems. The new field known as systems engineering has arisen to fulfill and exploit the promises which computers offer in these areas. This paper outlines the applications of analog and digital computers to chemical engineering problems, points out the specific advantages of each, and details the numbers and backgrounds of the operating personnel required. The newer field of application of computers to process control is reviewed in the light of progress to date and of present and future trends.

ISSN:0008-4034    

DOI:10.1002/cjce.5450390510

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1961

数据来源: WILEY

摘要:

AbstractA railway tank car has been built for Canadian General Transit Co. Limited and is operating in the leased service of Dow Chemical of Canada Limited for the shipment of hydrogen chloride anhydrous shipped at minus 50°F. in single shipments of about 89,000 lb.Necessary safety devices and a liquid CO2refrigeration system are included which will maintain the car at a safe pressure level for an extended period subject to the supply of liquid CO2

ISSN:0008-4034    

DOI:10.1002/cjce.5450390511

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1961

数据来源: WILEY