Gas Purifiers
Hydrogen Purifier
Product Overview
A large-flow hydrogen purifier offered in three process routes to suit the application: adsorption (BSS7-A), getter (BSS7-G) and combined adsorption plus getter (BSS7-H). Outlet impurities are held below 1 ppb, with flow covering 10–1000 Nm³/h.
Features & Specifications
Performance table (applicable gas: H₂)
| Impurity | Inlet (ppm) | BSS7-A outlet (ppb) | BSS7-G outlet (ppb) | BSS7-H outlet (ppb) |
|---|---|---|---|---|
| Process | — | ADS | GET | ADS+GET |
| H₂O | < 5 | < 1 | < 1 | < 1 |
| O₂ | < 3 | < 1 | < 1 | < 1 |
| CO | < 1 | < 1 | < 1 | < 1 |
| CO₂ | < 1 | < 1 | < 1 | < 1 |
| N₂ | < 1 | — | < 1 | < 1 |
| Ar | < 1 | — | — | — |
| CH₄ | < 0.5 | — | < 1 | < 1 |
| NMHC | < 1 | < 1 | < 1 | < 1 |
| Particles | — | ≤ 1 pcs/m³ (@0.003μm) | ≤ 1 pcs/m³ (@0.003μm) | ≤ 1 pcs/m³ (@0.003μm) |
| Flow range | — | 10–1000 Nm³/h | 10–300 Nm³/h | 10–300 Nm³/h |
The table lists the specification and configuration of standard models only; please enquire for other special requirements.
Detailed Description
The three process routes
BSS7-A (adsorption, ADS)
Multiple adsorption beds in parallel alternate between ambient purification and high-temperature regeneration, with a service life of over 20 years. Suits higher flows where a regeneration cycle is acceptable.BSS7-G (getter, GET)
One or more getter vessels in parallel purify at high temperature and cannot be regenerated; once saturated the vessel is replaced on site, with a service life of over 3 years. Simple in structure and deep in removal.BSS7-H (combined, ADS+GET)
Adsorption beds in series with getter vessels: two adsorption beds in parallel at the front alternate between ambient purification and high-temperature regeneration (life over 20 years), while multiple getter vessels in parallel at the back purify simultaneously at high temperature without regeneration and are replaced once saturated (life over 5 years). This combines high flow with deep removal.
Selection guidance
・Routine removal only, at higher flow → BSS7-A ・Deep removal required (including N₂ and CH₄) at moderate flow → BSS7-G ・Both → BSS7-HProcesses and industries served
・Epitaxy: hydrogen is the main carrier gas for silicon epitaxy and compound semiconductor MOCVD, where moisture and oxygen cause interface oxidation and defects directly ・Annealing and reduction processes: a reducing atmosphere at high temperature, where impurities affect film quality and electrical properties ・Optical fibre preforms: high-purity hydrogen for deposition and sintering ・Fuel cells and hydrogen energy testing: particularly sensitive to CO, since traces poison the catalyst ・Glass and metal heat treatment: protective atmosphere against oxidationInstallation and layout notes
・Hydrogen is flammable, so design the whole system to combustible gas rules: ventilation, gas detection, emergency shut-off and hazardous-area classification ・Handle regeneration exhaust and purge gas properly: vent gas from the regeneration step contains hydrogen and must go to safe discharge or thermal treatment ・Do not share tools or fittings with oxygen systems: cross-contamination is a problem for both purity and safety ・Earthing and static protection: pipework and the equipment body must both be reliably earthed ・Fit CO and moisture analysis at the outlet: CO is the impurity in hydrogen systems most often overlooked and most consequential ・Equipment size and utility requirements vary with process route and flow, so provide the site conditions when specifyingMaintenance and regeneration
・BSS7-A: adsorption beds regenerate automatically on a PLC schedule, with adsorbent designed for over 20 years ・BSS7-G: the getter vessel cannot be regenerated and is replaced on site once saturated, with a life of over 3 years ・BSS7-H: the front adsorption beds regenerate automatically (over 20 years) while the rear getter vessels are replaced periodically (over 5 years) ・For all three routes, routine maintenance focuses on regular checks of valve actuation, temperature control elements and safety interlocksChoosing between neighbouring models
| Model | Process | Removes N₂ / CH₄ | Removes Ar | Flow |
|---|---|---|---|---|
| BSS7-A | ADS | No | No | 10–1000 Nm³/h |
| BSS7-G | GET | Yes | No | 10–300 Nm³/h |
| BSS7-H | ADS+GET | Yes | No | 10–300 Nm³/h |
| BSS7-C cryogenic | Cryogenic ADS | Yes | Yes | 10–1000 Nm³/h |
