No abstract

The enthalpies of n-pentane, benzene, and water have been measured by a new flow calorimeter with results that differ from literature values by an average of 1.5 B.t.u. per pound. Results are presented for n-pentane from 100°to 700°F., with pressures up to 1400 p.s.i.a.The AMERICAN PETROLEUM INSTITUTE has initiated a program to measure the enthalpies of binary hydrocarbon mixtures experimentally at temperatures from ambient to incipient cracking, with pressures from atmospheric to 1400 p.s.i.a., for pentane and heavier hydrocarbons including paraffins, olefins, naphthenes, and aromatics. This paper describes the equipment used for the API project and presents data for w-pentane. Subsequent papers will present the results for hydrocarbon mixtures.

Measured enthalpy values are reported for five naphthas, a kerosine, a fuel oil, and a gas oil in the temperature range 155 to 640°F for pressures up to 1400 psia.

A flow calorimeter has been used to measure the enthalpy of benzene and six mixtures of the benzene-n-octane system. The results are tabulated from 380°to 700°F mixtures, with pressures ranging up to 1400 psia.

is indebted to the Division of Engineering Research and Development of the University of Rhode Island for financial support through a graduate research