Extraction of vanadium from pet-coke gasification cinder: Part 1 leaching kinetics studies in sulphuric acid medium

Keywords: Pet-Coke Cinder, Vanadium, Sulfuric Acid Leaching, Kinetics

Abstract


Petcoke cinder is a solid by-product generated during the gasification of petcoke, accounting for three to five percent of the petroleum coke mass. It commonly contains valuable metals like V, Ni, Al, and Fe, highlighting the resource's potential for vanadium extraction. Thus, it can be regarded as an emerging secondary source of vanadium and other critical metals. The conventional pyro-cum-hydrometallurgical process for vanadium recovery relied on alkali roasting, which was not only energy-intensive but also contributed to greenhouse gas emissions. Considering environmental concerns and high energy consumption, the current study embodies a state-of-the-art development of an economically viable process for extracting V from petcoke gasification cinders. This paper examines the method of sulfuric acid-leaching of vanadium from gasification cinders and the effects of various parameters, including acid concentration, temperature, process duration, percentage of H2O2, amount of sodium dodecyl sulfate (SDS), and solid-liquid phase ratios. The maximum vanadium yield of 95.62% was achieved under optimal conditions of sulfuric acid concentration, temperature, time, S/L ratio, and amounts of H2O2 and SDS, which were determined to be 4M, 90°C, 3 hours, 20%, and 6%, respectively. The shrinking surface-controlled model was employed to investigate leaching kinetics. The reaction order concerning sulfuric acid concentrations was found to be 1.29. According to the Arrhenius equation, the evaluated apparent activation energy for leaching was approximately 27.67 kJ/mol, and the empirical equation representing the acid leaching kinetics of vanadium is identified as 1-(1-α)1/3 = kt = (9.261 X 103) [H2SO4]1.2916exp[-27674/RT] T.

Author Biographies

Shibsundar Das, Project Associate

Mr Shibsundar Das is currently a Project Associate at CSIR-National Metallurgical Laboratory. His research interests include, waste processing, hydrometallurgy & pyrometallurgy.

Susmita Mohanta, Project Associate

Ms Susmita Mohanta is a Project Associate at CSIR-National Metallurgical Laboratory. Her research interest include non-ferrous metal extraction & refining, particulalry employing advanced separation techniques.

Akshay Kumar, Project Associate

Mr Akshay Kumar is a Project Associate at CSIR-National Metallurgical Laboratory. He has over 03 years of research experince in the area of hydrometallurgical extraction of base and precious metals.

Kamala Kanta Sahu, Chief Scientist

Dr. Kamala Kanta Sahu is a Chief Scientist & Group Leader of Non-Ferrous Processing Division of CSIR-NML. He has over 35 years of reseach experince in the area of non-ferrous extractive metallugy, materials synthesis & evaluation.

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Published
2025/12/31
How to Cite
Das, S., Mohanta, S., Kumar, A., Mishra, D., & Sahu, K. K. (2025). Extraction of vanadium from pet-coke gasification cinder: Part 1 leaching kinetics studies in sulphuric acid medium. Journal of Mining and Metallurgy, Section B: Metallurgy, 61(3), 333-344. Retrieved from https://aseestant.ceon.rs/index.php/jmm/article/view/57619
Issue
Vol. 61 No. 3 (2025)
Section
Original Scientific Paper

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