摘要:

AbstractExperimental work was carried out for the study of natural convection heat transfer from heated vertical plate to a non‐Newtonian fluid. Successive correlations were obtained and the results agree substantially with the theoretical predictio

ISSN:0008-4034    

DOI:10.1002/cjce.5450430401

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

年代:1965

数据来源: WILEY

摘要:

AbstractThis paper is a summary of six experiments which have contributed to our understanding of the utility of generalized Newtonian fluid (GNF) models, and particularly those which have a “zero‐shear viscosity” and some kind of a “characteristic time”. The accumulated evidence seems to support the use of such models for a wide range of technical applications: steady state flow in complex systems, steady state heat transfer, and slow unsteady

ISSN:0008-4034    

DOI:10.1002/cjce.5450430402

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

年代:1965

数据来源: WILEY

摘要:

AbstractA method is given for calculating the change in the equilibrium composition of a multicomponent solid‐gas system at constant temperature and pressure directly from a given change in the initial reactant composition, thus avoiding the complete recalculation of the equilibrium for each new initial mixture. The method can also be used to calculate individual equilibrium compositions. Two examples of how the calculations should be set up are give

ISSN:0008-4034    

DOI:10.1002/cjce.5450430403

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

年代:1965

数据来源: WILEY

摘要:

AbstractPellets of FeCl2were suspended from a thermogravimetric balance and reduced by hydrogen. Fine thermocouples were embedded in the particles and recorded the reaction temperature.In the abserrce of diffusion control through the boundary layer (H2HCI), the reduction was controlled by chemical reaction at the interface between the reduced and unreduced layers. The rate of advance of the interface towards the centre of the particle was constant with time and independent of the thickness of the reduced layer. A correlation of experimental data on different particle sizes reduced over the range 450–635°C. is present

ISSN:0008-4034    

DOI:10.1002/cjce.5450430404

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

年代:1965

数据来源: WILEY

摘要:

AbstractThe air oxidation of isobutene was investigated over supported and unsupported copper oxide catalysts in an isothermal integral flow reactor. The effect of various variables, that is, ratio of oxygen to isobutene in the feed, process temperature, copper concentration on the catalyst and reciprocal of space velocity on the conversion and yield were determined.Though several mechanisms were postulated, the rate of reaction was most satisfactorily correlated by a mechanism which assumes the rate controlling step as the surface reaction between strongly adsorbed isobutene and gaseous (weakly adsorbed) oxygen. A rate equation has been derived and the kinetic rate constant and adsorption constants for isobutene and methacrolein are reported as functions of temperature.

ISSN:0008-4034    

DOI:10.1002/cjce.5450430405

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

年代:1965

数据来源: WILEY

摘要:

AbstractA modified single‐pulse shock tube has been used to study the pyrolysis of methane in the presence of nitrogen. The reactants are rapidly heated by a reflected shock wave for about a millisecond and cooled by rarefaction waves. In the temperature range 1600–2500°K., nitrogen is found to have no effect on the first order decomposition rates of methane. Above 2500°K., considerable quantities of hydrogen cyanide are observed due to the reaction of nitrogen with hydroca

ISSN:0008-4034    

DOI:10.1002/cjce.5450430406

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

年代:1965

数据来源: WILEY

摘要:

AbstractAvailable experimental values of the self‐diffusivity at moderate pressures for 14 substances were used to establish a relationship between (ρD)* ξ and TR, where ξ = Tc1/6M1/2Pc2/3. The resulting relationship was found to reproduce 62 experimental points with an average deviation of 3.9%. For dense gases, the product of the self‐diffusion and binary diffusion coefficients with density was found to be independent of density up to ρR= 1.00. Therefore, values of the self‐diffusivity for dense gases can be calculated from the relationship between (ρD)*ξ and TR. For both nonpolar and polar mixtures values of the binary diffusion coefficient can be calculated from expressions developed previously for the force constants ξ/Kand δ, by the use of appropriate co

ISSN:0008-4034    

DOI:10.1002/cjce.5450430407

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

年代:1965

数据来源: WILEY

摘要:

AbstractSodium extended in the form of alloys with inert metals indicates marked acid neutralizing properties for hydrocarbon lubricating oil when the systems contain at least 20 atom percent sodium. Transparency of the treated oil correlated well with pH measurements.

ISSN:0008-4034    

DOI:10.1002/cjce.5450430408

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

年代:1965

数据来源: WILEY

摘要:

AbstractPotassium sulphate has been produced by a batch process from a mixture of sodium and magnesium sulphates, and potassium chloride. The process is made attractive by the production of additional products — magnesium chloride and sodium sulphate —, by the recirculation of brines and by the recovery of potassium chloride from the brine circuit. Purities of products throughout can be controlled by slight circuit adjustments and/or by additional water washes. Flow sheets have been prepared and several cycles of operation have proven that the process is relia

ISSN:0008-4034    

DOI:10.1002/cjce.5450430409

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

年代:1965

数据来源: WILEY

摘要:

AbstractIn the present paper, the flow behavior of single capsules of regular shape transported by two mineral oils of kinematic viscosities 45 and 7 centistokes respectively, in a 1 1/4‐inch diameter pipeline, are reported. In terms of pipe Reynolds number this means that the data for the more viscous oil were obtained for the laminar flow regime and the data for the less viscous oil were obtained, for the most part, for turbulent flow. A specific gravity range of 1.19‐7.86, a capsule diameter/pipe diameter ratio range of 0.39 (0.40)‐0.89 (0.90) and in the case of cylinders, lengths of 2‐in., 4‐in., and 7‐in. were i

ISSN:0008-4034    

DOI:10.1002/cjce.5450430410

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

年代:1965

数据来源: WILEY