Assessment of γ-AL2O3 Prepared from Local Clay as an Effective Catalyst for Thermal Cracking of Atmospheric Residue: Optimizations of Variables and Analysis of the Upgraded Liquid Oil: Assessment of γ-AL2O3 Prepared from Local Clay as an Effective Catalyst. (2026). Rafidain Journal of Science, 35(1), 82-93. https://doi.org/10.33899/rsci.v35i1.61994