Chemical speciation of petroleum and bio-oil coprocessing products: Investigating the introduction of renewable molecules in refining processes. (15th March 2021)

• Record Type: Journal Article
• Authors: Pontes, Nathália S.; Silva, Raquel V.S.; Ximenes, Vitor L.; Pinho, Andrea R.; Azevedo, Débora A.
• Is Part Of: Fuel. Volume 288(2021)
• Publication Date: 2021-03-15
• Subjects: Bio-oil -- Fast pyrolysis -- Vacuum residue -- Coprocessing -- Solvent deasphalting process; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2020.119654
• Languages: English
• ISSNs: 0016-2361

Abstract

Graphical abstract: Highlights: Bio-oil and vacuum residue were coprocessed simulating solvent deasphalting process. The solvent deasphalting process produced deasphalted oil and asphaltic residue. Deasphalted oil fraction is richer in hydrocarbons and low polar compounds. Asphaltic residue fraction contains several oxygenated compounds as benzenediols. Insertion of renewable molecules makes the fractions attractive in refining process. Abstract: The pentane solvent deasphalting (SDA) process was carried out with petroleum vacuum residue (VR) blend with a bio-oil (BO) and solely with the bio-oil as a raw material. Two fractions each were produced: deasphalted oil (DAO) and asphaltic residue (AR). This study deals with the chemical speciation of the fractions and investigation of the insertion of renewable molecules in the VR. Chemical characterization was performed by two high-resolution techniques: GC × GC-TOFMS and ESI(±)-Orbitrap HRMS. The GC × GC-TOFMS data showed that all fractions are mixtures of hydrocarbons and heteroatomic midpolar to polar compounds containing a wide variety of chemical functions. Aliphatic hydrocarbons were detected only in DAO fractions, showing that in the SDA process, the extraction of these compounds constituents of the VR was not affected by bio-oil inclusion. The ESI(±)-Orbitrap HRMS results allowed for the identification of nitrogen, oxygen, sulfur, and mixed heteroatomic classes. The chemical speciation obtained by the use of both techniques allowed the evaluation of effect of the SDA process on the fractions and assisted in the investigation of the degree of insertion of renewable molecules in SDA fractions, making them attractive in the application of refining processes, such as catalytic cracking. The DAO from the blend raw material was inserted in a bench-scale catalytic cracking load obtaining satisfactory results, and the AR fraction was introduced as an asphalt cement additive with promising results achieved in asphalt aging tests.