The core refining operations include atmospheric and vacuum distillation units, catalytic reforming units, catalytic cracking units, delayed coking units, diesel hydrotreating units, petrol adsorption desulfurization (S-Zorb), liquefied petroleum gas (LPG) separation, methyl tertiary butyl ether (MTBE) production, acid gas removal, feedstock and product handling stages (FPHS) (i.e., storage, blending, loading and unloading operations), and conclude with the transportation of refined products from the refinery.