Propane physical constants

Physica.1 Properties. Carbonyl sulfide [463-58-1] (carbon oxysulfide), COS, is a colorless gas that is odorless when pure however, it has been described as having a foul odor. Physical constants and thermodynamic properties are Hsted ia Table 1 (17,18). The vapor pressure has been fitted to an equation, and a detailed study has been made of the phase equiUbria of the carbonyl sulfide—propane system, which is important ia the purification of propane fuel (19,20). Carbonyl sulfide can be adsorbed on molecular sieves (qv) as a means for removal from propane (21). This approach has been compared to the use of various solvents and reagents (22). 

Physical Constants oi Selected Hydrocarbons Found in LP Gas. SOURCE Handbook/Butane-Propane Gases... 

Table 6.4 presents some fundamental physical constants. Critical pressures of propane and propylene are above 40 bar, but in practice 20 to 30 bar are sufficient... 

The more important normal, primary alcohols of the series, with some of their physical constants are given in Table IX and in Table X are given the isomeric alcohols related to propane butane and pentane with the number of known and possible isomers of a few of the higher members. 

As an example of the way properties of the various commercial grades of the liquefied petroleum gases generally differ from the properties for research grades that are shown in the Physical Constants tables. Table 1 compares vapor pressure properties for research grades and average commercial grades of propane and butane from one producer. (See Table 1.)... 

Moreover, these gases are often used in mixtures designed to have certain desired properties in particular, propane and butane are frequently ordered as mixtures to meet certain boiling points and other requirements of individual applications. Suppliers furnish data on physical constants for the various grades and mixtures they make available. 

Chemical/Physical. Atkinson et al. (2000) studied the kinetic and products of the gas-phase reaction of 2-heptanone with OH radicals in purified air at 25 °C and 740 mmHg. A relative rate constant of 1.17 x 10 " cmVmolecule Sec was calculated for this reaction. Reaction products identified by GO, FTIR, and atmospheric pressure ionization tandem mass spectroscopy were (with respective molar yields) formaldehyde, 0.38 acetaldehyde, L0.05 propanal, X0.05 butanal, 0.07 pentanal, 0.09 and molecular weight 175 organic nitrates. 

Blom, C. E., Altona, C. (1976). Application of self-consistent-field ab initio calculations to organic molecules II. Scale factor method for the calculation of vibrational frequencies from ab initio force constants Ethane, propane and cyclopropane. Molecular Physics, 31,1377. 

For industrial heating purposes combustible gases such as propane C3H8, butane C4H10 or a mixture of these gases are often used. In the CRC Handbook of Chemistry and Physics the following van der Waals constants are given for propane and butane ... 

Helman, W.P. and Ross, A.B. (1988) Critical review of rate constants for reactions of hydrated electrons, hydrogen atoms and hydroxyl radicals (OH/0 ) in aqueous solution. Chemical kinetic data base for combustion chemistry. Part 3 Propane. Journal of Physical Chemistry Reference Data, 17, 513-882. 

---