HYDROGEN RECOVERY FROM METHANOL PLANT PURGE GAS

Problem

In methanol production, synthesis gas is generated by reforming natural gas with steam. The synthesis gas is compressed and then reacted to form methanol. Unreacted syngas is recycled to the reactor. Since the normal ratio of hydrogen to carbon in the synthesis gas is greater than 2 ( the value required for methanol synthesis), excess hydrogen is removed by purging a hydrogen rich stream from the reactor loop and sending it to fuel.

VaporSep-H₂™ Solution

Recovery of hydrogen from methanol plant purge gas

If there is a use for hydrogen elsewhere in the facility, MTR’ s VaporSep-H₂™ membranes can be used to recover relatively pure hydrogen from this purge gas.

Benefits

VaporSep-H₂™ system for hydrogen recovery from methanol plant purge gas

Recovers useful hydrogen from methanol plant purge gas
Requires no additional rotating equipment
Easy to operate, passive system
Ambient temperature operation
Simple installation with skid-mounted construction

System Performance

Complete skid-mounted unit includes all necessary instrumentation and controls
Typical size: 6m (L) x 3m ft (W) x 2.5m (H); 6000 kg

System Description

Typically 80% of purge gas hydrogen recovered
Payback is 6 to 12 months

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