ISSN:0001-1541    

DOI:10.1002/aic.690080402

出版商:American Institute of Chemical Engineers    

年代:1962

数据来源: WILEY

ISSN:0001-1541    

DOI:10.1002/aic.690080403

出版商:American Institute of Chemical Engineers    

年代:1962

数据来源: WILEY

摘要:

AbstractThe model particles were prepared by oxidation of carbonyl iron spheres, followed by fractionation into cuts of very narrow size. A two‐wavelength radiation pyrometer was developed for measuring the temperature of the particles in flight, and special probes were designed for determining gas velocity and degree of reduction at different levels of the reacto

ISSN:0001-1541    

DOI:10.1002/aic.690080404

出版商:American Institute of Chemical Engineers    

年代:1962

数据来源: WILEY

摘要:

AbstractExpressions are derived in which local porosity in a filter cake is determined as a function of the distance through the cake. Under conditions where the superficial flow rate through the cake is constant and the medium pressure can be neglected, local porosity and the hydraulic pressure are functions of the fractional cake distance.

ISSN:0001-1541    

DOI:10.1002/aic.690080405

出版商:American Institute of Chemical Engineers    

年代:1962

数据来源: WILEY

ISSN:0001-1541    

DOI:10.1002/aic.690080406

出版商:American Institute of Chemical Engineers    

年代:1962

数据来源: WILEY

摘要:

AbstractThis paper presents a method of calculating the van Laar constants for binary vapor‐liquid systems. The basis of the method is the van Arkel modification of the van Laar (Scatchard‐Hildebrand) equations which utilize the concept of internal pressure. A generalized method of predicting the apparent internal pressure was developed and described. The experimental van Laar constants and those calculated by the proposed method are compared for twelve polar‐nonpolar binary sy

ISSN:0001-1541    

DOI:10.1002/aic.690080407

出版商:American Institute of Chemical Engineers    

年代:1962

数据来源: WILEY

ISSN:0001-1541    

DOI:10.1002/aic.690080408

出版商:American Institute of Chemical Engineers    

年代:1962

数据来源: WILEY

摘要:

AbstractRyan and Johnson's treatment of the transition from laminar to turbulent flow is extended to include the heated flow of pseudoplastic liquids in smooth tubes. A limitation is pointed out for the case of Bingham plastic fluids.The theoretical results of the present investigation are compared with experimental data obtained for a large number of pseudoplastic fluids having widely variant rheological properties. It is found that the theoretically predicted flow rates corresponding to the inception of turbulence agree with the observed values to within ±6.7%. The theoretical critical wall shear stresses agree within ±3.87% with experimen

ISSN:0001-1541    

DOI:10.1002/aic.690080409

出版商:American Institute of Chemical Engineers    

年代:1962

数据来源: WILEY

ISSN:0001-1541    

DOI:10.1002/aic.690080410

出版商:American Institute of Chemical Engineers    

年代:1962

数据来源: WILEY

摘要:

AbstractRate studies were carried out for the ortho‐para hydrogen conversion at liquid nitrogen temperature with a multiple‐impregnation nickel on aluminum oxide catalyst. Data were obtained at pressures up to 400 lb./sq. in. gauge over a range of flow rates for three catalysts of different pellet sizes.For the largest particle, ⅛‐in. cylinders, diffusion resistances were significant. Effectiveness factors were evaluated and found to be somewhat less that 0.5 for this relatively active catalyst. After the diffusion resistances were accounted for, the surface rate was correlated on the basis of a mechanism supposing molecular hyddrogen to be adsorbed on the surface. Separate evaluation of the catalyst for the hydrogen‐deuterium exchange reaction suggested that dissociation was not significant at liquid nitrogen te

ISSN:0001-1541    

DOI:10.1002/aic.690080411

出版商:American Institute of Chemical Engineers    

年代:1962

数据来源: WILEY