CMS purity selection guide

1.Is Higher Purity or Higher Yield Always Better? Not necessarily. Higher purity typically comes with lower yield, higher air consumption, and increased energy costs. If your process only requires 99.9% nitrogen, using a sieve that delivers 99.999% is simply overkill—and unnecessarily expensive. The same applies to yield. Pushing for maximum yield can compromise purity stability and lead to oxygen breakthrough, making the nitrogen unsuitable for your application. The smart approach: first determine the minimum purity your process requires, then choose a CMS that offers the best possible yield at that purity level. Avoid chasing extreme specifications.    2.Why Does Higher Purity Reduce Nitrogen Yield? Carbon molecular sieve purifies nitrogen by adsorbing oxygen. When extremely high nitrogen purity is required (e.g., increasing from 99.9% to 99.999%), the sieve must adsorb nearly all oxygen from the feed air. Here’s the trade-off: The purer the nitrogen you need, the more nitrogen you have to sacrifice to carry away the adsorbed oxygen. This increases the adsorption load on the sieve while reducing effective output.   3. Purity vs. Yield Selection Guide (Example: SLCMS-UEP)   Pressure Purity N₂ Yield (m³/h·t) Air/N₂ Ratio Typical Applications Note 0.7 MPa 99.5% 325 2.6 Coal mine fire prevention, tank inerting, grain storage High volume, lower purity 99.9% 230 3.2 Laser cutting, food packaging, tire curing Best cost-performance balance 99.99% 160 3.9 Electronics reflow soldering, chemical blanketing High purity, moderate yield 99.999% 100 5.4 Lithium battery manufacturing, pharmaceutical isolation Purity first   Key Takeaway: Always start with your actual purity requirement. Then select a CMS that maximizes yield at that purity level. This ensures reliable process performance without unnecessary operating costs.   If you want to get more information about us,you can click www.carbon-cms.com.