Prediction of Sulfur Content, API Gravity, and Viscosity Using a Continuous Mixture Kinetic Model for Maya Crude Oil Hydrocracking in a Slurry-Phase Reactor

Abstract

A continuous mixture kinetic model was applied to describe the hydrocracking reactions of Maya crude oil in a slurryphase reactor. Besides the prediction of simulated distillation curves, complementary models were developed to predict American Petroleum Institute (API) gravity, viscosity, and total sulfur content as the reaction proceeds. Experiments were carried out in a batch-type reactor under 800 psig of hydrogen and 400 °C at several reaction times. Powder ammonium heptamolybdate (1000 ppm Mo) was added and activated in situ. Vacuum residue (VR) conversion reached 88 and 96% after 7.5 and 24 h of reaction, respectively. The formation of liquid products (bp < 538 °C) was maximum and fairly constant (65À66 wt %) for VR conversions from 37 to 88%. Feed and liquid reaction products were characterized by thermogravimetric analysis (TGA). Total sulfur, viscosity, and API gravity were also measured. The mathematical model accurately describes TGA distillation curves for VR conversions up to 88%, and the developed models for the calculation of sulfur content, viscosity, and API gravity predict with good accuracy the values of these properties.

Slurry-phase hydrocracking of heavy oil and model reactant: effect of dispersed Mo catalyst

“…The slurry-phase hydrocracking is a promising technology, which could process inferior feedstock oils with the characteristics of high metal content, high sulphur content and high carbon residue, etc., [1][2][3][4][5][6].…”

Soft analyzer for sulfur content in tail oil of hydrocracking process based on adaptively regularized dynamic polynomial PLS

“…Under the VI framework, which performs functional optimization with respect to each element on the righthand side of Equation (12), the posterior distributions of c j , α j , and β j are obtained as…”

“…For example, Elizalde and Ancheyta 11 simulated the removal of sulfur and hydrocracking reactions that occur during the hydrotreatment of heavy oil by a continuous kinetic lumping approach. Martinet‐Grimaldo et al 12 used a continuous lumped model to predict the sulfur content, American Petroleum Institute gravity, and viscosity of Maya crude oil hydrocracking products. Peng et al 13 studied the effects of temperature, volumetric air velocity, and hydrogen partial pressure on the wax oil hydrocracking reaction by establishing kinetic models.…”