摘要:

AbstractA necessary and sufficient condition for stability of the empty adiabatic tubular reactor with axial mixing is derived which depends upon steady state information alone. The stability conditions require the solution of a linear ordinary differential equation and the character of this solution determines the stability or instability of the system without the use of transient calculation. The lumped constant reactor is always stable. The method of computation requires a minimum amount of memory capacity in a digital computer and could be carried out on an analogue computer with ease.

ISSN:0008-4034    

DOI:10.1002/cjce.5450430201

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

年代:1965

数据来源: WILEY

摘要:

AbstractUsing the concepts of dilatant suspension behavior introduced by Bagnold, an equation has been derived for the hydraulic gradient necessary to transport solids in a two‐dimensional channel where suspension arises from the Bagnold dispersive stress.The equation has been tested for the case where a stationary bed of solids exists and the empirical constant in the equation is found to agree with that obtained by Bagnold for shear in an annulus.The equation bears a strong resemblance to that verified experimentally for circular pipes by Abbot

ISSN:0008-4034    

DOI:10.1002/cjce.5450430202

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

年代:1965

数据来源: WILEY

摘要:

AbstractExperimental measurements were made of the rate at which coke, deposited in situ, was burned off a porous chromia‐alumina dehydrogenation catalyst by hot air. Over the range of variables examined, the regeneration rate passed from complete dependence on chemical kinetics to complete dependence on the rate of oxygen diffusion through the catalyst pores. A model of the regeneration process which accounts for simultaneous pore diffusion and chemical kinetics was successfully fitted to the experimental dat

ISSN:0008-4034    

DOI:10.1002/cjce.5450430203

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

年代:1965

数据来源: WILEY

摘要:

AbstractThis paper reports the dynamic behavior of a particular continuous stirred‐tank reactor system, which has been investigated in detail both experimentally and on an analog computer. The two sets of data were taken under comparable conditions to facilitate comparison. The reaction between formaldehyde and ammonia was chosen for study, because of its high heat of reaction and its significant reaction rate at room temperature. Agreement between the experimental data and the computer results was quite good, with most deviations being explainable as arising from the use of an approximate form for the kinetic rate expressio

ISSN:0008-4034    

DOI:10.1002/cjce.5450430204

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

年代:1965

数据来源: WILEY

ISSN:0008-4034    

DOI:10.1002/cjce.5450430205

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

年代:1965

数据来源: WILEY

摘要:

AbstractThe critical temperatures and critical pressures established in the vapor‐liquid equilibrium studies of the ethane —n‐pentane—n‐heptane system, in conjunction with the critical behavior of the three corresponding binary systems, were used to develop the critical behavior of this ternary system. The results of this development are presented in the form of triangular plots for critical temperature and critical pressure and cover the complete range of composition for th

ISSN:0008-4034    

DOI:10.1002/cjce.5450430206

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

年代:1965

数据来源: WILEY

摘要:

AbstractThe gas hydrate equilibrium curves for systems containing methane and nitrogen have been obtained in the temperature interval 32°F. to 72°F. and between pressures of 350 and 5100 Ib./sq.in.abs. The composition of the equilibrium gas and hydrate phases was determined experimentally at 32°F. and 44°F. This information was used to calculate vapor‐solid equilibrium ratios for both nitrogen and methane. A comparison is made between the equilibrium ratios in this system which crystallizes in Structure I and the ratios in systems reported earlier which crystallize in Structu

ISSN:0008-4034    

DOI:10.1002/cjce.5450430207

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

年代:1965

数据来源: WILEY

摘要:

AbstractA semi‐empirical method is proposed for the prediction of adsorption equilibria of binary gas mixtures from pure component isotherms, including and extending beyond the range of validity of previous methods. It is based on an expression, derived earlier by one of the authors(1) which relates the binary separation factor α to the pure component pressure ratio at constant volume adsorbed.The method permits the quantitative calculation of the binary isotherms,V1=f1(p1) andV2=f2(p2), in the entire range of mono‐molecular adsorption, and yields predicted values in good agreement with experimental data for a variety of systems in the range 75°‐363°K and total pressures up t

ISSN:0008-4034    

DOI:10.1002/cjce.5450430208

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

年代:1965

数据来源: WILEY

摘要:

AbstractThis paper presents a method of predicting vapor‐liquid equilibria of binary systems at reduced or higher pressures if vapor‐liquid equilibria of the systems concerned are available at atmospheric pressure. The method is based upon Prahl's three‐constant equation which expresses vapor‐liquid composition relationships directly. Experimental data and those calculated by the proposed method are compared for five typical nonideal binary

ISSN:0008-4034    

DOI:10.1002/cjce.5450430209

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

年代:1965

数据来源: WILEY

摘要:

AbstractThe pressure drop of aqueous model nylon fibre suspensions was determined in a vertical 2‐in. copper tube in the turbulent range as a function of velocity, fibre length‐to‐diameter ratio (L/D) and concentration. Fibre diameters ranged from 20.2 to 51.6 microns and length from 0.52 to 1.21 mm. A marked depression below the value for the pressure drop of water was observed at high L/D's and its magnitude increased with the solids concentration. For low L/D values the depression was almost negligible. An explanation is advanced for the depression in pressure drop based on alterations in the turbulence characteristics in the presence of f

ISSN:0008-4034    

DOI:10.1002/cjce.5450430210

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

年代:1965

数据来源: WILEY