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Unissi India Pvt. Ltd. is a pioneer in oxygen generation technology.
Our precision-engineered oxygen generation systems are installed in Pan India, Bangladesh, and Nepal in mission-critical hospital applications.
The technology used – Pressure Swing Absorption
What is PSA?
Pressure Swing Adsorption (PSA) is the most commonly used non-cryogenic oxygen & nitrogen production process, the most effective for small and medium capacities. The process operates by using two columns filled with adsorbent, a molecular sieve. Clean & dry compressed air enters the first column, unwanted molecules are being trapped while the product gas is allowed to pass through. When the active column is saturated, the airflow is redirected to the second column. The saturated column depressurizes allowing the molecular sieve to completely regenerate. The process is repeated continuously.
Achievements :
When our healthcare sector was trembled by the Pendamic Covid-19 which hit India in early 2020 as witnessed by everyone there was an exorbitant demand for Oxygen.
Motivated by the vision of our prime minister Mr. Narender Modi to make India self-reliant and considering our vast experience of over 30+ years in the field of onsite Oxygen generation Unissi started manufacturing Gas generation modules under the “UNIOX “brand in 2020 under the Make in India & Atmanirbhar Program.
Features :
Non-cryogenic processesPressure swing adsorption provides the separation of oxygen or nitrogen from the air without liquefaction. The process operates around ambient temperature; a zeolite (molecular sponge) is exposed to high-pressure air, then the air is released and an adsorbed film of the desired gas is released. The size of the compressor is much reduced over a liquefaction plant, and portable oxygen concentrators are made in this manner to provide oxygen-enriched air for medical purposes. Vacuum swing adsorption is a similar process; the product gas is evolved from the zeolite at sub-atmospheric pressure.
Nitrogen Generator (PSA & Membrane Type)If you are looking for a large capacity nitrogen generation package, and footprint is critical, our frame-mounted N2 generators are quite simply best value for money. The system is plug-and-play and the design is well-proven with well over one hundred installations around the globe.
Benefits:
High capacity nitrogen membrane-type meets the needs of large-volume users. Including manufacturers of steel, food, wastewater treatments, glass, textiles, and pharmaceuticals, as well as oil and gas production.
Engineered for fast installation, high-flow nitrogen equipment is designed by UNISSI to minimize your electrical power consumption. Low maintenance and easy to operate, these nitrogen systems from UNISSI are ideal for a wide range of applications, with significant operational savings.
Weather-proofed self-contained membrane systems are a way of producing a ready-made solution to hold the nitrogen at a lower cost than engineering, designing, and building a structure to hold the PSA and compressor skid.
Operating pressures up to 7 bar (100 PSIG) are normal, to achieve higher pressure up to 24 Bar (350 PSIG), features of the skid-mounted system, is easily transported and provides convenient access for maintenance. Models are available to supply high-volume requirements of up to 5, 000 M³/hr (170, 000 SCFH with a range of purities of up to 99.9%).
UNISSI supplies a wide range of desiccant air dryers, ideal for pipeline maintenance and other offshore industries.
Methods:
Electrolysis of waterElectrolysis of water is the process of using electricity to decompose water into oxygen and hydrogen gas by a process called electrolysis. Hydrogen gas released in this way can be used as hydrogen fuel, or remixed with the oxygen to create oxyhydrogen gas, which is used in welding and other applications.
Sometimes called water splitting, electrolysis requires a minimum potential difference of 1.23 volts, though at that voltage external heat is required from the environment.
Overall reaction: H2O(l) → H2(g) + O(g)The number of hydrogen molecules produced is thus twice the number of oxygen molecules. Assuming equal temperature and pressure for both gases, the produced hydrogen gas has, therefore, twice the volume of the produced oxygen gas. The number of electrons pushed through the water is twice the number of generated hydrogen molecules and four times the number of generated oxygen molecules.
Alkaline Water (Unipolar & Bipolar)A water ionizer (also known as an alkaline ionizer) is a home appliance that claims to raise the pH of drinking water by using electrolysis to separate the incoming water stream into acidic and alkaline components. The alkaline stream of the treated water is called “alkaline water”. Proponents claim that consumption of alkaline water results in a variety of health benefits, making it similar “to the alternative health practice of alkaline diets. Such claims violate basic principles of chemistry and physiology. There is no medical evidence for any health benefits of alkaline water.
Polymer Electrolyte Membrane (PEM)A proton-exchange membrane, or polymer-electrolyte membrane (PEM), is a semipermeable membrane generally made from ionomers and designed to conduct protons while acting as an electronic insulator and reactant barrier, e.g. to oxygen and hydrogen gas. This is their essential function when incorporated into a membrane electrode assembly (MEA) of a proton-exchange membrane fuel cell or of a proton-exchange membrane electrolyser: separation of reactants and transport of protons while blocking a direct electronic pathway through the membrane.
PEMs can be made from either pure polymer membranes or from composite membranes, where other materials are embedded in a polymer matrix. One of the most common and commercially available PEM materials is the fluoropolymer (PFSA) Nafion, a DuPont product. While Nafion is an ionomer with a per fluorinated backbone like Teflon, there are many other structural motifs used to make ionomers for proton-exchange membranes. Many use polyaromatic polymers, while others use partially fluorinated polymers.
Proton-exchange membranes are primarily characterized by proton conductivity (σ), methanol permeability (P), and thermal stability.
PEM fuel cells use a solid polymer membrane (a thin plastic film) which is permeable to protons when it is saturated with water, but it does not conduct electrons.
