摘要:

AbstractThis paper reviews the methods which have been proposed for evaluating the lower limit of velocity for which a fluidized bed of solids will be stable. Experimental tests for determining the minimum fluidizing velocity have been obtained for nine narrowly sized coal samples ranging from 0.0099 to 0.224 in. in diameter, and for one widely sized sample less than a No. 10 Tyler sieve using dry air at atmospheric conditions in a 5 1/2 in. diameter bed. The results are compared with those predicted using the correlations of other workers.

ISSN:0008-4034    

DOI:10.1002/cjce.5450360201

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

年代:1958

数据来源: WILEY

摘要:

AbstractThe characteristics of drivers for large petroleum refinery compressors are discussed. Gas turbines, steam turbines and electric motors are compared for six different applications. If cheap refinery gas is available the gas turbine has an advantage but otherwise electric drivers are favored.

ISSN:0008-4034    

DOI:10.1002/cjce.5450360202

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

年代:1958

数据来源: WILEY

摘要:

AbstractThe process of black‐liquor oxidation is treated theoretically and an equation is derived for design purposes. Capacity coefficients were determined experimentally for two different arrangements of asbestos‐cement packing sheets. Data include those obtained from a study of a full‐scale commercial oxidation unit as well as those from an investigation using a pilot‐scale experimental tower with a modified arrangement of asbestos‐cement packing. Results from the pilot‐scale study indicate that the modified packing yields higher capacity coefficients than the packing in the full‐scale unit although the mass‐transfer coefficients are very similar for both packings using the pilot‐scale tower under rigorously controlled flow conditions, it was found that the capacity coefficients increase with increase in liquor flow rate and are virtually unaffected by changes in air‐flow rate when this is sufficiently high to provide adequate oxygen for the reaction. The significance of the experimental results is

ISSN:0008-4034    

DOI:10.1002/cjce.5450360203

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

年代:1958

数据来源: WILEY

摘要:

AbstractThe transfer coefficients for oxygen from air to water and dilute salt solutions and from air to sodium sulphide solutions catalyzed by copper ion have been determined in an unbaffled stirred vessel. Up to the level of agitation at which the vortex broke the surface there is no apparent simple relation between these coefficients. Scale up on the basis of sulphite oxidation rates is therefore likely to be successful only under conditions of similar geometry and Reynold's number. Apparent activation energies of 1.2 and 10.6 kcal./g.mole were obtained for the transfer of oxygen to water and M/20 sodium sulphite solution respectively.

ISSN:0008-4034    

DOI:10.1002/cjce.5450360204

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

年代:1958

数据来源: WILEY

摘要:

AbstractThe preparation of fine RDX of controlled particle size has been studied and a satisfactory continuous process has been developed. One of the main features of the process is the use of an impinging jet mixing head which obviates many of the variables encountered in previous methods of preparation.

ISSN:0008-4034    

DOI:10.1002/cjce.5450360205

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

年代:1958

数据来源: WILEY

摘要:

AbstractA successful method for phlegmatization of fine RDX has been developed. Small quantities for the phlegmatizing wax are dissolved with RDX in acetone and the wax is co‐precipitated as a very thin film on individual RDX crystals.This method is incorporated into the technique for precipitation of fine RDX previously reporte

ISSN:0008-4034    

DOI:10.1002/cjce.5450360206

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

年代:1958

数据来源: WILEY