Title: Colloidal stability and hot filtration test of residual fuel oils based on visbreaking and ebullated bed residue H-Oil hydrocracking

Authors: Dicho Stratiev; Ivelina Shishkova; Natalia Ivanova; Anife Veli; Radoslava Nikolova; Magdalena Mitkova; Kiril Stanulov; Georgy Argirov; Dobromir Yordanov; Ekaterina Nikolaychuk

Addresses: LUKOIL Neftohim Burgas AD, Burgas, 8104, Bulgaria ' LUKOIL Neftohim Burgas AD, Burgas, 8104, Bulgaria ' Burgas University 'Assen Zlatarov', 1, Prof. Yakimov str., Burgas, 8000, Bulgaria ' Burgas University 'Assen Zlatarov', 1, Prof. Yakimov str., Burgas, 8000, Bulgaria ' Burgas University 'Assen Zlatarov', 1, Prof. Yakimov str., Burgas, 8000, Bulgaria ' Burgas University 'Assen Zlatarov', 1, Prof. Yakimov str., Burgas, 8000, Bulgaria ' University of Chemical Technology and Metallurgy, 8, Kliment Ohridski Blvd., Sofia, 1756, Bulgaria ' LUKOIL Neftohim Burgas AD, Burgas, 8104, Bulgaria ' Burgas University 'Assen Zlatarov', 1, Prof. Yakimov str., Burgas, 8000, Bulgaria ' LUKOIL Neftohim Burgas AD, Burgas, 8104, Bulgaria

Abstract: Six H-Oil-based residual fuel oils, two H-Oil atmospheric tower bottom products, two H-Oil vacuum tower bottom products, one visbreaker-based residual fuel oil, and three different straight run vacuum residual oils were studied in this work. The colloidal stability parameters S-value (ASTM D7157), and separability number (ASTM D7061), along with SARA-based colloidal instability index, and the solubility parameters of asphaltene and maltene fractions of the studied residual oils were tested to correlate with the residual oil sediment content. It was found that none of the colloidal stability parameters correlated with the residual oil sediment content, while correlations were found between the different colloidal stability parameters. This study has shown that only the residual oil samples whose S-value has been at minimum of 1.375 kept their sediment contents without change with the course of time. [Received: August 1, 2016; Accepted: December 4, 2016]

Keywords: residue colloidal stability; S-value; separability number; solubility parameters; hot filtration test; SARA; colloidal instability index; CII.

DOI: 10.1504/IJOGCT.2019.097446

International Journal of Oil, Gas and Coal Technology, 2019 Vol.20 No.2, pp.169 - 188

Received: 01 Aug 2016
Accepted: 04 Dec 2016
Published online: 23 Jan 2019 *