Purifying of Waste Tire Pyrolysis Oil Using an S-ZrO2/SBA-15-H2O2 Catalytic Oxidation Method

Abstract

Heavy fuel oils contain a high amount of sulfur. In this work, an extent amount of sulfur content waste tire pyrolysis oil (WTPO) was used as a fuel feedstock. A promising alternative oxidative desulfurization (ODS) method was applied in sulfur removal from WTPO using a S-ZrO2/SBA-15 solid acid catalyst, hydrogen peroxide (H2O2) as an oxidant and acetonitrile as an extracting solvent at varied conditions. The prepared catalyst was characterized by X-ray diffraction (XRD), Bruanuer-Emmet-Teller (BET) method and Fourier transform infrared spectroscopy (FTIR) analysis. The influence of reaction parameters such as reaction time (30-60 min), catalyst loading (0.5–1.5 wt.%), oxidant to oil mole ratio (5–15) at fixed reaction temperature 70 °C on desulfurization of WTPO were investigated. Taguchi method was selected to design the experiment for optimizing the reaction parameters by maximizing the sulfur removal efficiency. The maximum desulfurization efficiency 59.49% was obtained under optimum conditions reaction time (60 min), catalyst loading (1.0 wt.%) and oxidant to sulfur mole ratio (10:1). A catalytic S-ZrO2/SBA-15 -H2O2 oxidation system for oxidative desulfurization of waste tire pyrolysis oil using at mild reaction conditions was developed.

Catalytic oxidative desulphurization of pyrolytic oils to fuels over different waste derived carbon-based catalysts

“…Additionally, the original high sulphur content represented an obstacle to an efficient removal by using a biphasic approach with the extracted sulphone that rapidly reached the saturation of watery phase. Nonetheless, CC and TC displayed catalytic performances very close to systems operating on tires derived oil [28,60] even if none of previously published research based on biphasic systems treated oil with a sulphur content high such the one used in the present study.…”

Integrated Assessment of Waste Tire Pyrolysis and Upgrading Pathways for Production of High-Value Products

“… 29 , 30 Despite all this, other methods of ex situ desulfurization were unable to achieve the same efficiency as HDS, although some disadvantages of HDS could be eliminated. 31 , 32 …”

“…Hydrodesulfurization (HDS) was a traditional method of ex situ desulfurization, and the most commonly used to fulfill the sulfur removal of oil products. The experimental results of HDS under different catalysts and parameters demonstrated that the maximum removal efficiency could reach 99.9%. , Different from sulfides without ring structure, dibenzothiophene (DBT) and substituted DBTs were more difficult to be removed through HDS owing to the influence of steric resistance. , Despite all this, other methods of ex situ desulfurization were unable to achieve the same efficiency as HDS, although some disadvantages of HDS could be eliminated. , …”

“…29,30 Despite all this, other methods of ex situ desulfurization were unable to achieve the same efficiency as HDS, although some disadvantages of HDS could be eliminated. 31,32 With respect to CBp upgrading, modification and activation were adopted according to different utilization purposes. CBp activation aimed at increasing the surface area and porosity to obtain activated carbon with excellent adsorption performance, while the target of CBp modification was to make modified carbon black (M-CBp) equal to commercial carbon black.…”

A Review of the Desulfurization Processes Used for Waste Tire Pyrolysis Oil

“…It has been determined that WTPO has a higher sulfur content (0.7-1.7) than the standard liquid fuel. This high sulfur content limits the application of WTPO in real combustion engines (Table 1) [5,[11][12][13] because the presence of sulfur compounds (Figure 1) in WTPO causes the emission of highly toxic SOx, which is a considerable environmental and health threat, during its combustion. Thus, an efficient desulfurization method to remove sulfur compounds from WTPO prior to using it alone or in commercial diesel fuels is urgently needed.…”