Investigating a high vanadium petroleum coke ash fusibility and its modification

Li, Jiazhou; Xiong, Qing-an; Shan, Jie; Zhao, Jing‐Tai; Fang, Yitian

doi:10.1016/j.fuel.2017.09.110

Cited by 20 publications

(9 citation statements)

References 33 publications

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“…Through thermal conversion calculations, Frandsen et al 8 proved that vanadium trioxide (V 2 O 3 ) is the existing form of V at reducing conditions. Coincidently, Li et al 9 conducted a quenching experiment with V 2 O 5 additive in petcoke ash. Their results demonstrated that the additive is transferred to V 2 O 3 and FeV 2 O 4 at 1300 °C in a reducing atmosphere, thereby progressively increasing the ash fusion temperatures.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Transformation Behavior of Nickel and Vanadium during Steam Gasification of Petroleum Coke

Nie

Wang

et al. 2018

Ind. Eng. Chem. Res.

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The gasification of petroleum coke (petcoke) can cause fouling and erosion problems. In this study, the evolution of Ni and V during steam gasification is investigated in a fluidized bed from 800 to 1100 °C. The occurrence modes determined by the sequential extraction show that raw petcoke contains diversified Ni forms, whereas V is dominated by organic matter and residual form. The organic matter is rapidly converted to residual form. The Ni in residual form is partially released, whereas the V in residual form is considerably converted to other forms. The volatilization of Ni is positively correlated with the temperature and sulfur content, whereas V has a positive correlation with the exchangeable form. The exchangeable form of V is conducive to forming a well-developed pore structure, whereas carbonates play the opposite role. Under the practical fluidized bed gasification, Ni tends to cause erosion, especially for continental petcoke, whereas V is inclined to cause slagging and fouling.

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Section: Introductionmentioning

confidence: 99%

Investigation of the Transformation Behavior of Nickel and Vanadium during Steam Gasification of Petroleum Coke

Nie

Wang

et al. 2018

Ind. Eng. Chem. Res.

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“…The phases V 2 O 3 and FeV 2 O 4 appeared in simulations of tests 7 and 8. These phases have been found in petcoke ash experiments by other researchers [14][15][16][17][18]. The mechanism for vanadium-alumina interactions were discussed by Jonayat et al [8].…”

Section: Resultsmentioning

confidence: 65%

A FactsSage Simulation Study on the Interaction of Synthetic Petcoke Slags with Alumina Crucibles

Karri

Banik

Pisupati

2021

Fuels

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In entrained flow gasifiers, inorganic species in solid fuels are converted to slag, which flows continuously along the gasifier’s refractory lining. Slag viscosity is critical for its continuous flow and, consequently, reliable operation of the gasifier. Viscosity of synthetic petcoke ash was measured in a high temperature viscometer (up to 1500 °C) using high alumina crucibles. Crucible material was found to dissolve in slag, causing thinning and leading to formation of holes on the walls. To explain this dissolution, thermodynamic equilibrium calculations were performed in FactSage™ (Thermfact/CRCT, Montreal, QC, Canada and GTT-Technologies, Aachen, Germany) using different synthetic petcoke ash compositions in 100% H2, 5% H2/ 95% N2, 69.5% CO/30.5% CO2, and 100% O2 atmospheres. An inverse correlation was found between crucible dissolution and alumina content in the slag. Rates of dissolution of alumina from crucible into slag varied significantly in the different atmospheres. The correlation was validated experimentally by heating six synthetic slags with varying compositions to 1500 °C in 5% H2/N2 (to simulate viscometer’s atmosphere) gas. SEM-EDS analysis of the samples confirmed that the sample with lower initial content of alumina in the slag showed higher amounts of aluminum at the slag–crucible interface. Additions of alumina in the synthetic petcoke ash (containing up to 49.74% V2O5) mitigated crucible dissolution.

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“…The results (Figure 2, Table 3) confirmed that large quantities of organic matter were removed through annealing; however, 11.73% of residues remained even after annealing at 2700 °C. EDS mapping ( Figure 3) was performed to determine the composition of the residue Among the metal components, a large quantity of vanadium was observed in the petroleum coke soot [19][20][21]. Many prior studies have suggested various physical and chemical methods to remove this metal.…”

Section: Resultsmentioning

confidence: 99%

Utilization of Petroleum Coke Soot as Energy Storage Material

et al. 2019

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Anode active materials for lithium ion batteries (LIBs) were produced by using waste soot generated after combustion in a plant using petroleum coke as fuel. The soot collected from the boilers in the plant was graphitized through annealing, and this annealed soot was applied to anode active materials. After annealing at 2700 °C, the soot was converted into highly crystalline graphite with ring shapes approximately 100 nm in diameter. The lithium ion coin cells produced using graphitized soot showed high discharge capacity and excellent life cycle with a reversible capacity of 250 mAh/g even after 300 cycles at a rate of 1 C. This study describes a new possibility of using environmentally harmful combustion wastes of petroleum coke as a low-price anode material for LIBs by converting them into a graphite multilayer structure with a unique ring shape through annealing.

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Investigating a high vanadium petroleum coke ash fusibility and its modification

Cited by 20 publications

References 33 publications

Investigation of the Transformation Behavior of Nickel and Vanadium during Steam Gasification of Petroleum Coke

Investigation of the Transformation Behavior of Nickel and Vanadium during Steam Gasification of Petroleum Coke

A FactsSage Simulation Study on the Interaction of Synthetic Petcoke Slags with Alumina Crucibles

Utilization of Petroleum Coke Soot as Energy Storage Material

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