Kinetic modeling of crude oil gasification for hydrogen production with in situ CO₂ capture

ABSTRACT

Steam gasification process in the presence of CaO is an efficient method to convert carbon-based fuels, producing a gas with low concentration of CO₂ and high hydrogen yield. In the present work, an unsteady-state, kinetic model of crude oil gasification was developed for prediction of gas composition and performance parameters. The effects of key operating parameters including [H₂O]/[C] and [CaO]/[C] on hydrogen yield and CO₂ capture ratio (CCR) were studied. The results showed that the CCR increased with increasing [CaO]/[C] from 0.1 to 0.7 (mg/mg) and then decreased, probably due to the reversal of exothermic carbonation reaction by Le Chatelier's principle. In spite of [CaO]/[C], CCR improved continuously with increasing [H₂O]/[C] probably due to a significant improvement in the endothermic nature of the process by increasing [H₂O]/[C].

KEYWORDS:

• CCR
• [CaO]/[C]
• hydrogen
• [H₂O]/[C]
• gasification