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Chemical byproduct

Another hydrogen production route is the recovery and purification of byproduct hydrogen from chemical or petrochemical processes.

The most common chemical processes where hydrogen is recovered include (but not limited to):

  • Chlorine production
  • Ethylene production
  • Propylene production from propane dehydrogenation (PDH)
  • Refinery production off gases (meets 50% of refinery hydrogen needs)
Chlorine in the periodic table of elements

About these documents

This website centralises publications on hydrogen, with a particular focus on technology and especially safety.

The publications are issued by industrial gases associations or standardisation bodies.

Depending on the issuing organisation, some publications may not be available for free download.