Palladium Hydrogen Purifiers - PS7-PD05 (0 - 50 slpm)

SAES Pure Gas micro-channel palladium purifiers produce ultra-high-purity hydrogen (99.9999999%). All purifiers use patented micro-channel palladium membrane technology to remove all impurities to parts-per-trillion levels. The compact PS7-PD05 purifier is ideal for low flow rate university, laboratory, and industrial applications. The hydrogen purifier can be installed downstream of compressed cylinders or generators.

Model Number	Typical Flow	Data Sheet	Flow Curves
PS7-PD05-08	5.5 slpm	Data Sheet	Flow Curve
PS7-PD05-21	12.5 slpm		Flow Curve
PS7-PD05-50	28.4 slpm		Flow Curve
Typical Flow at 200 psig inlet pressure, 60 psig outlet pressure. Higher flow available with lower outlet pressures.

How it Works

Purification of hydrogen by palladium (Pd) membrane diffusion is the accepted technology for applications requiring parts-per-billion gas purity. Palladium acts as a catalyst, causing hydrogen gas molecules to dissociate into atoms upon contacting the membrane surface. The atoms are small enough to diffuse through the palladium membrane, driven by differential hydrogen pressure across the membrane. The hydrogen atoms recombine into molecules after passing through the membrane. Hydrogen purifiers operate at approximately 400°C. At this temperature, hydrogen atoms readily diffuse through the membranes. No other material can diffuse through palladium and so the permeate is only hydrogen.

Impurities including H₂O, O₂, CO, CO₂, CH₄/THC, N₂, He, and Ar  remain on the inlet side of the membrane and are continuously purged through a bleed connection. The unique properties of palladium provide a solid barrier with no breakthroughs as compared to catalysts and getters that rely on chemical reactions on reactive surface areas.

Key Features

• Ultra-pure hydrogen from a variety of sources
• Automatic N₂ purge for cell protection
• Outlet check valve to prevent back diffusion
• Boost bleed valve for quick bleed line purging
• Electrical cabinet purge
• PLC controller with 5.0" color touch screen
• High/Low temperature alarms
• CE Marked

Palladium Advantages

• Only hydrogen passes through to the pure side - the purest gas
• Every impurity is removed - no exceptions
• Unlimited lifetime - no regeneration or vessel replacement
• Separates pure H₂ from source gas with ppm or % level impurities
• Easy to verify performance with in-situ helium leak test

Applications

• Gas chromatography (GC)
• Analytical instrument zero/carrier gas
• GaN epitaxy
• Silicon carbide (SiC) epitaxy
• III/V and II/VI MOCVD
• Carbon nanotubes
• Metallurgy
• Fuel cells

Ordering Information