Carbon molecular sieves produced by most manufacturers look very similar; consequently, it is difficult for users to distinguish between imported and domestically produced sieves simply by visual inspection. However, a word of caution: if a manufacturer claims to use high-quality imported molecular sieves but offers the equipment at a price far below market rates, you should be wary. Sellers are invariably more astute than buyers, and equipment manufacturers are unlikely to sell at a loss. While purchasing equipment containing domestic molecular sieves is not inherently problematic, paying the premium price of imported sieves only to receive domestic ones results in a significant financial loss.
As we know, carbon molecular sieve-based Pressure Swing Adsorption (PSA) nitrogen generation relies on van der Waals forces to separate oxygen and nitrogen. Therefore, a larger specific surface area, a more uniform pore size distribution, and a higher density of micropores or sub-micropores all contribute to greater adsorption capacity. Furthermore, minimizing pore size allows for the overlapping of van der Waals force fields, resulting in superior separation efficiency-even for low-concentration substances. In PSA nitrogen generation systems, the performance of the molecular sieve directly impacts both gas output and energy consumption; thus, selecting the right adsorbent is of paramount importance.