Abstract
An asphaltenic residue from deasphalting a synthetic crude obtained by direct liquefaction of a Spanish subbituminous coal was submitted to several upgrading routes. This paper reports the results from thermal hydroprocessing. Solubility-based lumped kinetics with parallel reactions for oils, gases and coke formation are proposed. Conversion data fit second-order kinetics for asphaltene conversion and for oil, gas and coke formation. Coke formation was inhibited except under the harshest reaction conditions. Two pathways for coke formation are proposed: one as primary reaction product after an induction a period and the other as secondary product from a sequence of polymerization steps. The presence of hydrogen strongly inhibits the primary coke formation. Structural analyses show higher aromaticity of the oils from products obtained at 475°C than at 450°C, which supports the proposed condensation mechanism for coke production at high temperatures.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
