Desulfurizing of Pyrolysis Oil of Used Tires Using a 3D-Printed Vortex Diode and Modeling of Process

Abstract

The use of pyrolysis oil can be seen as an alternative fuel for maritime transport. However, pyrolysis oil from tires must be desulfurized for this. Recently, this can be done by hydrodynamic cavitation. This process does not require oxidation chemicals but only water, a cavitation generator, and a pump to drive it. In the literature, this concept has been successfully tested on model fuels. In this study, the cavitation generator for the desulfurization of waste tire pyrolysis oil was printed from polylactic acid-based on simulations of the optimal design, which allows for much cheaper production and easy replacement in case of wear or testing of alternative designs. After 60 min of treatment at 5 bar inlet pressure, a desulfurization of almost 33% was achieved. Furthermore, an interaction analysis showed that only from a pyrolysis oil content of 5.5 to 6% does hydrodynamic cavitation have an effective effect on desulfurization.

Removal of single and dual ring thiophene’s from dodecane using cavitation based processes

“…HC ODS has looked at the use of vortex diode based devices (Uebe et al . [15] ) and also compared the vortex diode with an orifice (Suryawanshi et al [14] ). The studies reporting the use of HC ODS, by the approach of mixing fuel and water have considered either very high, ∼10,000 ppm (Uebe et al [15] ) or very low initial concentrations (up to 300 ppm).…”

“… [15] ) and also compared the vortex diode with an orifice (Suryawanshi et al [14] ). The studies reporting the use of HC ODS, by the approach of mixing fuel and water have considered either very high, ∼10,000 ppm (Uebe et al [15] ) or very low initial concentrations (up to 300 ppm). In this work, 2500 ppm was selected as the initial concentration which corresponds to approximately 950 ppm of sulphur.…”

“…Recent publications have focused on using HC systems for oxidative desulphurization by combining water and fuel utilising hydrodynamic cavitation (HC) devices without additives. HC was applied to a range of model fuels (octanol, toluene, octane, diesel) [14] and pyrolysis oil [15] . These studies focus on single ring structure thiophene and an unspecified sulphur pool.…”

Modeling of Hydrodynamic Cavitation Reactors: Reflections on Present Status and Path Forward

“…In many applications, such as wastewater treatment; − ozonation; microbial disinfection; − desulfurization of fuels; , biomass pretreatment; , and biodiesel synthesis; , the combined influence of all of these physicochemical effects controls the overall performance.…”