Technical & Troubleshooting Guides
Practical sizing, troubleshooting, and technical guidance for molecular sieve systems.
How Do You Know When to Replace a ZSM-5 Catalyst?
The signs a ZSM-5 catalyst in a VOC emission control system has reached the end of its service life, and how to tell reversible fouling from permanent deactivation.
How Do You Know When to Replace a Copper-Nickel Desulfurization Catalyst?
Learn the performance, analytical, and physical signals that indicate a Copper-Nickel Desulfurization Catalyst guard bed needs replacing.
How Do You Know When to Replace a Deeply Refined Catalyst?
How to recognize breakthrough, pressure drop, and capacity signs that mean a Deeply Refined Catalyst guard bed needs replacing, not just continued service.
How Do You Know When to Replace a High or Low Temperature Shift Catalyst?
The different ways a high-temperature (Fe-Cr) and low-temperature (Cu-Zn-Al) shift catalyst age — and the specific warning signs for each bed before replacement.
How Do You Know When to Replace a COS Hydrolysis or Activated Carbon Fine Desulfurization Catalyst?
COS hydrolysis catalysts and activated carbon fine desulfurization catalysts fail in different ways. Learn the warning signs for each bed, how to rule out process problems, and how to plan a change-out.
How Do You Know When to Replace a Ni-Mo or Ni-Mo-W Hydrogenation Catalyst?
The operational and physical signs that tell you a Ni-Mo or Ni-Mo-W hydrogenation catalyst has reached the end of its run — and when regeneration still makes sense instead.
How Do You Know When to Replace 4A Molecular Sieve in a Compressed Air or Industrial Gas Drying System?
Rising dew point, dusting, pressure drop, and other warning signs that tell you it's time to replace the 4A molecular sieve in your compressed air or industrial gas drying system.
How Do You Know When to Replace 3A Molecular Sieve in an Ethanol Dehydration Unit?
Four warning signs that a 3A molecular sieve bed in an ethanol dehydration unit is reaching end of life — from falling purity to dusting and coking — and when to replace rather than regenerate.
Activated Clay (Bleaching Earth) for Palm Oil Decolorization and Lubricating Oil Regeneration: Industrial Applications Explained
How activated clay (bleaching earth) works — the adsorption mechanism behind its two most established industrial uses: palm oil decolorization and used lubricating oil regeneration.
How Do You Know When to Replace Molecular Sieve in an LPG Purification Unit?
Breakthrough, rising pressure drop, bead dusting, and process upsets — here's how to tell when molecular sieve in your LPG purification unit has actually reached end of life, not just mid-cycle.
Deeply Refined Catalyst vs Desulfurization and Arsenic Removal Catalyst: How to Choose the Right Purification Stage
Deeply Refined Catalyst and Desulfurization and Arsenic Removal Catalyst both use copper oxide against sulfur and arsenic — but they serve different stages of the purification train. Here's how to choose.
How Do You Know When to Replace Refrigerant Molecular Sieve (XH Series) in an AC/Refrigeration Filter Drier?
A sight glass moisture indicator turning yellow, intermittent cooling from expansion valve icing, or a rising pressure drop across the drier — these are the real signals that refrigerant molecular sieve (XH series) has reached saturation and the filter drier needs replacing.