Abstract

GOMES, Luis Miguel; ESCALANTE, Alfredo  and  BOUZA, Alexis. VAPOR-LIQUID EQUILIBRIUM STUDY IN MIXTURES OF HYDROGEN AND HYDROCARBONS WITH EMPHASIS ON HYDROCRACKING PROCESSES. Rev. Fac. Ing. UCV [online]. 2012, vol.27, n.1, pp.78-91. ISSN 0798-4065.

In this work, a study of the vapor-liquid equilibrium (ELV) in mixtures of hydrocarbons and hydrogen was made using the cubic equations of state (EOS) of Peng-Robinson (PR) and Soave-Redlich-Kwong (SRK). The main objective is to predict accurately the vapor liquid equilibrium in mixtures of hydrocarbons and hydrogen in a range of temperature and pressures commonly used in hydrocracking processes. Initially, various models available in the literature are studied. These models are based in the modification of parametersof the equations of state such as "a(T,w)" and/or the covolume"b", and in the use of correlations for the binary interaction parameters between hydrogen and hydrocarbons. Subsequently, the binary interaction parameters were correlated using 520 experimental points of solubility of hydrogen in hydrocarbons from n-hexane to n-hexatriacontane.The results obtained indicated that by adjusting two parameters, one for as a(T,w) and other for b,the equilibrium is represented with an average error of 3.3 % for the PREOS and 3.6 % for the SRK EOS. The correlations proposed can be used to predict ELV in systems containing hydrogen and heavy hydrocarbons usually present in hydrocracking processes

Keywords : Vapor-liquid equilibrium; EOS; Hydrogen; Hydrocarbons; Hydrocracking.

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