摘要:

AbstractThis article introduces a series of analytical and critical literature surveys which deal first with the individual fundamental momentum transfer phenomena associated with particulate motion as affected by particle shape, roughness, acceleration, concentration and rotation, as well as the turbulence characteristics and boundary conditions of the transporting fluid. This information will then be used as a basis of discussion and interpretation of the many investigations of multiparticle solids‐gas conveying systems and contacting techniques reported in the literature.This first paper reviews briefly some pertinent basic concepts of fluid mechanics, and then considers the development of the fluid velocity field and drag for single spherical particles moving rectilinearly at pre‐wake‐forming Reynolds Numbers through an infinite and undisturbed

ISSN:0008-4034    

DOI:10.1002/cjce.5450370401

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

年代:1959

数据来源: WILEY

摘要:

AbstractPressure‐volume‐temperature measurements onn‐butanol have been carried out using the Kay type of pressure‐block apparatus and glass capillary cell. Determinations were made isothermally in the saturated vapor and liquid and superheated vapor regions to above the critical point. Compressibility factors have been calculated. Constants in the Beattie‐Bridgman equation of state have been determined from 250° to 300° C. at pressures up to 75 atmospheres.The thermodynamic properties of normal butanol have been calculated over a temperature range of 0°C. to 300°C. and at pressures up to 1000 lb./sq. in. abs. from the PVT data. Values for the saturated liquid, saturated vapor, and superheated vapor are presented on a pressure‐enthalpy diagram with specific volume and entropy as parameters. The entropy of the saturated vapor increases with temperature over a considerable region, indicating a positive specific heat of the saturated vapor in contrast to the lower alcohols of

ISSN:0008-4034    

DOI:10.1002/cjce.5450370402

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

年代:1959

数据来源: WILEY

摘要:

AbstractRecent studies of the hydrogen‐precipitation of uranium dioxide from alkaline carbonate solutions have been extended. It was revealed that the reduction takes place in two phases. The first of these is the one described by Forward and Halpern. The second stage, much slower than the first, appears to be associated with the complete covering of the catalyst by the solid product. It is shown that while quantitative information is unreliable, a good qualitative description of the second‐stage reaction can be based on the diffusion of reactants through this product layer to the catalyst surf

ISSN:0008-4034    

DOI:10.1002/cjce.5450370403

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

年代:1959

数据来源: WILEY

摘要:

AbstractThe effects of air flow rate, oxygen partial pressure, aeration disk size and porosity, liquid height, and surface‐active agents on aeration were studied in two unstirred towers or column‐type vessels of different diameters using the sodium sulphite oxidation method. The coefficient of oxygen transfer increased with air flow rate up to the “flooding” point. The air flow rate required to cause “flooding” was increased by increasing the area of the aeration disk relative to the cross‐sectional area of the tower. Within limits, aeration was improved by using disks of finer porosity. Under most conditions the coefficient of oxygen transfer was much higher in the small tower. The coefficient of transfer was not affected by liquid height in the tower, but efficiency of absorption increased with height. Aeration was adversely affected by all surface active

ISSN:0008-4034    

DOI:10.1002/cjce.5450370404

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

年代:1959

数据来源: WILEY

摘要:

AbstractA generalized enthalpy‐correction chart based on the law of corresponding states was constructed using the compressibility factor information reported by Nelson and Obert(6, 7). The range of pressures covered the region from Pr= 0.02 to Pr= 40, and the temperature extended from Tr= 0.265 to Tr= 12.5. The results produced from the correlation of this work have been found to agree with those obtained from some of the more sophisticated methods already presented in the literatur

ISSN:0008-4034    

DOI:10.1002/cjce.5450370405

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

年代:1959

数据来源: WILEY