Modified Nitrogen plant to generate medical Oxygen, installed by M/s. UPL Ltd. at L GRotaryHospital, Vapi(Gujarat) | Source: Ministry of Environment, Forest and Climate Change
Considering the requirement of medical oxygen amidst the COVID-19 pandemic situation, the Government of India explored the feasibility of the conversion of existing Nitrogen plants to Oxygen Plants. Various such potential industries, wherein existing nitrogen plants may be spared for the production of oxygen were identified.
The process of converting the existing Pressure Swing Absorption (PSA) nitrogen plants for the production of oxygen was discussed. In nitrogen plants, Carbon Molecular Sieve (CMS) is used whereas Zeolite Molecular Sieve (ZMS) is required for producing oxygen. Therefore, by replacing CMS with ZMS and carrying out few other changes such as oxygen analyzer, control panel system, flow valves etc. existing nitrogen plants can be modified to produce oxygen.
On deliberation with the industries, so far 14 industries have been identified where conversion of plants is under progress. Further 37 Nitrogen plants have been also identified with the help of industry associations.
A nitrogen plant modified for the production of oxygen can be either shifted to a nearby hospital or, in case it is not feasible to shift the plant, it can be used for on-site production of oxygen, which can be transported to the hospital through specialized vessels/cylinders.