The molecular sieve used in oxygen generators is the zeolite molecular sieve. It is a crystalline silica and aluminate polyhydric compound. Molecular sieves have a uniform pore size and their main function is to sieve molecules. There are three main types of molecular sieves: A, X and Y. The 13X molecular sieve is the only adsorbent currently used in liquid air separation plants. Any molecules that can be adsorbed on 3A, 4A and 5A molecular sieves can be adsorbed by 13X molecular sieves. It is characterized by strong water absorption, and has good adsorption performance at high temperature and low partial pressure, and can adsorb more kinds of harmful impurities in the process air. 13X molecular sieve crystal cavity volume, surface area is also large, its adsorption capacity is high, fast diffusion. 13X molecular sieve through the slope of the curve is larger, so its mass transfer area is shorter, fast adsorption.
The main characteristics of molecular sieve.
1, very strong adsorption, good selective adsorption performance.
2, very high dryness, good drying ability for high temperature gases.
3, good stability, below 200 ℃ can still maintain the normal adsorption capacity. The service life of molecular sieve is also relatively long.
4, the molecular sieve has a particularly strong adsorption capacity for water, followed by acetylene and carbon dioxide.
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