Study on the recovery of hydrogen from refinery (hydrogen + methane) gas mixtures using hydrate technology

• 来源期刊: 中国科学B辑(英文版)
• 年，卷（期）: 2008,（2）
• 页码范围: 171-178
• 页数: 8页
• 语种: 英文
• DOI: 10.1007/s11426-007-0131-8

摘要

A novel technique for separating hydrogen from (H2 + CH4) gas mixtures through hydrate forma-tion/dissociation was proposed.In this work, a systematic experimental study was performed on the separation of hydrogen from (H2+CH4) feed mixtures with various hydrogen contents (mole fraction x =40%-90%).The experimental results showed that the hydrogen content could be enriched to as high as～94% for various feed mixtures using the proposed hydrate technology under a temperature slightly above 0℃ and a pressure below 5.0 MPa.With the addition of a small amount of suitable additives, the rate of hydrate formation could be increased significantly.Anti-agglomeration was used to disperse hydrate particles into the condensate phase.Instead of preventing hydrate growth (as in the kinetic inhibitor tests), hydrates were allowed to form, but only as small dispersed particles.Anti-agglomera-tion could keep hydrate particles suspended in a range of condensate types at 1℃ and 5 MPa in the water-in-oil emulsion.