Hydrogen gas purifier

ammonia

Product Overview
Hydrogen recovery membrane modules selectively separate and concentrate hydrogen from hydrogen-containing gas streams produced in refining, petrochemical, ammonia synthesis and related industrial processes. The membrane module is the core separation element; configuration (single- or multi-stage) depends on feed composition, capacity, pressure and product requirements. This description defines the membrane module and its separation role; it does not specify a full system scope. Compression, pretreatment and staging must be assessed against project conditions.

Separation Principle
Separation is driven by a partial-pressure difference across the membrane. In suitable hydrogen-containing mixtures, hydrogen typically permeates faster than larger or slower-permeating species, producing a hydrogen-enriched permeate while heavier or slower components remain on the high-pressure side. Final separation performance depends on feed composition, pressure, temperature, flow rates, product specification and recovery targets.

Typical Applications

• Refinery & Petrochemical Off-Gas: Recover a hydrogen-enriched stream from hydrogen-containing off-gas for reuse or further processing, subject to downstream requirements.
• Ammonia Purge Gas: Concentrate hydrogen from purge streams for reinjection or plant use as defined by site boundaries.
• Methanol Process Streams: Treat suitable hydrogen-containing streams in methanol production for hydrogen recovery or composition adjustment.
• Syngas Adjustment: Apply selective separation to support hydrogen-ratio adjustment in compatible syngas streams.

Process Considerations

• Obtain the complete feed composition and its variability, with attention to droplets, particles, condensable hydrocarbons and contaminants that may impair membrane performance.
• Inlet pressure, temperature and flow rate determine driving force and influence required membrane area and configuration.
• Assess product composition targets, allowable hydrogen loss and recovery objectives together; multi-stage membranes or hybrid systems may be needed to meet specifications.

Information Required

• Complete feed-gas composition and expected variation range of key impurities
• Feed flow rate, inlet pressure and temperature
• Target product composition and intended downstream use
• Allowable hydrogen loss or desired recovery percentage

Technical specifications

• Product family: hydrogen recovery membrane module
• Primary function: selective separation, concentration and recovery of hydrogen from hydrogen-containing gas streams
• Separation principle: partial-pressure driven membrane permeation; hydrogen permeates faster than larger/slower components
• Typical applications: refinery & petrochemical off-gas, ammonia purge gas, methanol process streams, syngas adjustment
• Configurations: single- or multi-stage arrangements; membrane module serves as core separation element
• Process variables affecting performance: feed composition (including droplets/particles/condensable hydrocarbons), inlet pressure, temperature, flow, product specifications and recovery requirements
• Additional considerations: compression and pretreatment may be required depending on project conditions
• Information required for offering: feed-gas composition, feed flow, inlet pressure and temperature, target product composition, allowable hydrogen loss/recovery targets