Energy consumption has significantly increased as technology advances and the world population grows. Unfortunately, the primary energy source remains fossil fuels, which has led to massive carbon dioxide (CO2) emissions. These emissions have contributed to the greenhouse effect and climate change. In this context, pure oxygen has emerged as a crucial element in the energy transition due to its ability to enhance various energy production and storage technologies. However, the current methods of cryogenic distillation, water electrolysis, and pressure swing adsorption (PSA) for air separation are either energy-intensive or produce non-high purity oxygen. A comparative analysis of inorganic dense ceramic-based oxygen transport membranes (OTMs) with traditional oxygen production technologies shows that OTMs have irreplaceable advantages.