Hydrogen recovery from hydrocarbon synthesis processes

A process for providing a hydrogen-rich stream comprising:

• a) performing a hydrocarbon synthesis process;
• b) isolating a hydrogen-depleted stream from the hydrocarbon synthesis process;
• and
• c) isolating a hydrogen-rich stream comprising greater than 90 vol. % hydrogen from the hydrogen-depleted stream by a process comprising contacting the hydrogen-containing stream with a first reverse-selective membrane and a second reverse-selective membrane.

An integrated Fischer Tropsch process comprising:

• a) performing Fischer Tropsch process using syngas to provide a hydrocarbon product stream and a hydrogen-depleted stream;
• b) isolating a hydrogen-rich stream from the hydrogen-depleted stream by a process comprising contacting the hydrogen-depleted stream with a first reverse-selective membrane and a second reverse-selective membrane;
• and
• c) upgrading at least a portion of the hydrocarbon product stream by reacting it with at least a portion of the hydrogen-rich stream.

A process for providing a hydrogen-rich stream comprising:

• a) performing a hydrocarbon synthesis process using syngas to provide at least one hydrocarbon stream and a hydrogen-depleted stream;
• b) isolating a hydrogen-containing stream from the hydrogen-depleted stream by a process comprising contacting with a first reverse-selective membrane, performing a water gas shift reaction, and contacting with a second reverse-selective membrane, wherein the hydrogen concentration on a water-free basis of the hydrogen-containing stream is at least 5 vol. % greater than the hydrogen concentration on a water-free basis of the hydrogen-depleted stream;
• and
• c) passing the hydrogen-containing stream through a pressure swing adsorption unit to provide a hydrogen-rich stream comprising greater than 90 vol. % hydrogen.