Utami AR, Ansyory D, Haryati S, Bustan MD. Upgrading vacuum residue by swelling of CO2 gas and catalytic cracking process by using Al2O3 catalyst. Sriwijaya Journal of Environment [Internet]. 2020 Aug. 30 [cited 2026 Oct. 23];5(2):69-75. Available from: https://ojs.pps.unsri.ac.id/index.php/ppsunsri/article/view/215