Estimation of physical properties

Sources of data on costs were discussed in Chapter 6 and materials of construction in Chapter 7. This chapter covers sources of information on manufacturing processes and physical properties and the estimation of physical property data. Information on the types of equipment (unit operations) used in chemical process plants is given in Volume 2, and in the Chapters concerned with equipment selection and design in this Volume, Chapters 10, 11 and 12. 

Figure 3. Estimation of physical properties and partition coefficients of organic chemicals.

Axial, film, and macropore Maxwell and Knudsen diffusion coefficients are estimated based on relatively standard formulations ( 6, 7, 8, 9), using estimates of physical properties shown in Table I to compute the diffusivity values for the systems studied. The effect of errors in the estimated values of these properties will be discussed later. 

Lyman, W.J. 1984. Estimation of Physical Properties. In W.B. Neely and G.E. Blau, Eds., Environmental Exposure from Chemicals, Vol. 1. CRC Press, Boca Raton pp 13-47. 

Lyman, W.J. (1985) Chapter 2, Estimation of physical properties. In Environmental Exposure From Chemicals. Volume I. Neely, W.B., Blau, G.E., Editors, CRC Press, Inc., Boca Raton, Florida. pp,13M8. 

Bugaj J, Gorecki M. Rheometrical estimation of physical properties of sodium alginate and sodium carboxymethylcellulose aqueous solutions. Acta Pol Pharm Drug Res 1996 53(2) 141-146. 

The framework of interactive design is entirely built on the premise of additivity of group contributions for the estimation of physical properties. Let us look at some typical illustrations. Table XV shows the estimation of normal boiling points T, and normal melting points T , using Joback s group contribution techniques (Joback and Reid, 1987), along with the... 

As the limitations of the additive group-contribution techniques become more apparent, new representational models will be required to solve the product design problem. These models must maintain some simplicity in the structure-property relationships, which can be inverted in an efficient and explicit manner to yield the structure(s) of the feasible molecule(s). Such models have yet to be invented, but it is important to keep in mind the needs of the product design, as new theories and techniques are being written for the estimation of physical properties. 

Lyman WJ (1985) Estimation of physical properties. In Neely WB and Blau GE (eds.) Environmental Exposure from Chemicals, vol. I, p. 31. Boca Raton, EL CRC Press. 

ChemSep is a suite of programs for performing multicomponent separation process calculations on PCs. It was created specifically for use by students in university courses on stagewise separation processes, but it is also used by professionals in industry. It includes ChemProp, a program that allows estimation of physical properties such as densities, viscosities, heat capacities and conductivities, and surface ten-... 

Modern chemical processing demands much better estimates of physical properties than in previous eras because the costs of excessive design are now often too great. High-pressure systems are of particular concern, and they are becoming more prevalent as in coal gasification and liquefaction and in Fischer-Tropsch syntheses. A weak link in estimation techniques for these systems is the vapor—liquid equilibrium distribution of components at temperatures well above the critical temperature of one or more of the species present and below the critical temperature of the others. 

Volume B1 Fundamentals of Chemical Engineering contains chapters on mathematical and numerical methods, modelling, transport phenomena, fluid mechanics, the estimation of physical properties, combustion. 

ONKEN V., PAUL H.I., Estimation of physical properties, Ullmann s Enc. Ind. Chem., Bl, chap. 6. 

Estimation of Physical Properties of Archeological Silk with NMR Relaxation Time and Fluctuation-Dissipation Theorem... 

Estimation of Physical Properties of Silk Fabrics Preserved in Chusonji Temple and the Left-and-Right Problem... 

Table B.4. Parameters used for the estimation of physical properties in the synthesis of MTBE...

The calculated value of ft turns out to be about 10 jhis number is so far below unity that we can safely accept the crude estimates of physical properties that went into it. (For... 

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