AlKhafaji, K.S. , Al-Zaidi, B.Y. , Shakor, Z.M. and Hussein, S.J. 2022. Comparison between Conventional and Metakaolin bi-functional Catalyst in the Hydrodesulfurization Operation. Journal of Petroleum Research and Studies. 12, 2 (Jun. 2022), 64-80. DOI:https://doi.org/10.52716/jprs.v12i2.658.