Crude oil is processed to produce gasoline and other hydrocarbon fuels via atmospheric and/or vacuum distillation in refineries. This application involves applying a vacuum to a crude oil distillation column. The combination of heat and vacuum separates the crude oil into different components based on their boiling temperature (distillation). Its purpose is to enhance the recovery of the lighter components, such as gasoline. Vacuum distillation is more energy efficient than atmospheric distillation. Liquid ring vacuum pumps and steam ejectors offer reliable, low maintenance solutions for vacuum distillation of crude oil in refinery applications. Combining these technologies into an optimized hybrid vacuum system delivers an efficient solution that reduces greenhouse gas emissions.