摘要:

AbstractDrying rates of finely powdered aluminum soaps and diatomaceous silicas were determined in a tray dryer. The weight of solid on the tray was automatically recorded. As expected for fine powders, plots of drying rate against moisture content were concave downward. The data were correlated by equations of the form N = aXG0.625where N is the drying rate in lb./(hr.) (sq.ft.) and XGis the free moisture content in lb. of water per lb. of dry solid. A straight line was obtained by plotting log a for aluminum stearate against the reciprocal of absolute temperature and a similar relationship was assumed to hold for the other materials which were dried at two temperatures only. Intercepts of the temperature plots seemed to depend upon bulk density or average particle size but no general correlation was possible.

ISSN:0008-4034    

DOI:10.1002/cjce.5450370201

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

年代:1959

数据来源: WILEY

摘要:

AbstractThe use of lead in the chemical and metallurgical operations at Trail, B.C. is described.A wide variety of corrosive environments are encountered, including phosphoric and sulphuric acids, sulphur dioxide, fluorides, and ammonium sulphate. It is found that except in the presence of fluorine compounds, 6% antimonial lead is more resistant to corrosion than is soft lead.The mechanical properties of lead are reviewed with particular reference to its high specific gravity, low mechanical strength, creep and fatigue properties. Principles of plant design to give adequate support, to provide for thermal expansion and contraction, and to minimize the effects of creep and fatigue are enunciated, and illustrated by proven designs that have given long periods of satisfactory service.

ISSN:0008-4034    

DOI:10.1002/cjce.5450370202

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

年代:1959

数据来源: WILEY

摘要:

AbstractThe pyrolysis of a heavy high sulphur crude oil in an inert fluidized bed at temperatures between 550 and 800°C. has resulted in the production of an olefin rich gas and a liquid product containing increasing amounts of aromatic material with increasing temperature.Analysis of the process gas has shown that for average reactor residence times of more than one second, equilibrium is approximated for the system ethane‐ethylene‐hydrogen. There is considerable scatter in the data for the analogous system propane‐propylene‐hydrogen but for most conditions a significant deviation from equilibrium exists.The sulphur compounds in the light oil were of thiophenic character. The ratio of 2‐ to 3‐methylthiophene in the toluene fractions

ISSN:0008-4034    

DOI:10.1002/cjce.5450370203

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

年代:1959

数据来源: WILEY

摘要:

AbstractThe Meissner‐Greenfield correlations of azeotrope composition and boiling point have been checked with new data with satisfactory results except in the cases of hydrocarbons—acids and halogen hydrocarbons—acids.A modification of these correlations for azeotrope composition has been extended to other combinations of organic liquids where the deviations from Raoult's law can be predicted from the hydrogen bonding characteristics of the components.A simple empirical linear equation for azeotrope boiling point has been applied to most of the cases included in the above correl

ISSN:0008-4034    

DOI:10.1002/cjce.5450370204

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

年代:1959

数据来源: WILEY

摘要:

AbstractThe use of solar energy, in most applications, is dependent primarily on economic considerations; solar energy can become an important energy source when the costs of its use become competitive with the costs of energy from other sources. The basic and usually most costly item of equipment for solar energy utilization is the collector, or solar heat exchanger, and the amortization of the first cost of this and associated equipment is the major cost of solar energy. In this paper, the probable economic feasibility of several solar applications is assessed by using the costs of energy from present sources as a basis for estimating upper limits on the first cost of solar heat exchangers and their associated equipment. For example, for space heating in temperate climates, heat exchanger costs would have to be in the range of $1–6 for solar heating to be competitive; this appears to be within an attainable range. Economic considerations have helped shape the development of the Wisconsin solar energy program, and studies of solar heat exchangers and their application to heating, cooling and power generation are briefly describe

ISSN:0008-4034    

DOI:10.1002/cjce.5450370205

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

年代:1959

数据来源: WILEY

摘要:

AbstractThe drag on freely oriented bodies in motion relative to an infinite fluid is related to the Reynolds number, ReS, by the formulaK = 24ReS+ CIRes2where Res= DsuOρ/μ is formed from the diameter, Ds, of a sphere with the same surface area as the body, and K = 8ρFD/πμ2is defined as the drag number. The inertial drag coefficient, Cl, is related to shape, orientation, and the Reynolds number. At Reynolds numbers above 2000 the relation is expressed by the formula,Cl= 2.53 − 0.283e2Ψwhere Ψ, the surface sphericity, is the ratio of the surface area of a sphere with the same volume to the gurface area of the body. Correlations are also developed for predicting Clat Reynolds numbers be

ISSN:0008-4034    

DOI:10.1002/cjce.5450370206

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

年代:1959

数据来源: WILEY

ISSN:0008-4034    

DOI:10.1002/cjce.5450370207

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

年代:1959

数据来源: WILEY