Method and system for generating hydrogen-enriched fuel gas for emissions reduction and carbon dioxide for sequestration

A system for generating hydrogen-enriched fuel gas and carbon dioxide comprising:

• (a) an inlet handling system;
• (b) a syngas and water-gas shift system;
• (c) a water-gas compression system;
• (d) a carbon dioxide recovery system;
• (e) a dehydration system;
• and
• (f) a carbon dioxide compression system;
• wherein the inlet handling system prepares a gaseous hydrocarbon feed stream having a pressure and a temperature to be fed to the syngas and water-gas shift system by removing liquids and solids, reducing the pressure of the gaseous hydrocarbon feed stream, and maintaining the temperature of the gaseous hydrocarbon stream for downstream processes;
• wherein the syngas and water-gas shift system produces hydrogen-bearing syngas by reforming the gaseous hydrocarbon feed stream into hydrogen and carbon monoxide and then converts the carbon monoxide to carbon dioxide, thereby producing a water-gas stream;
• wherein the carbon dioxide recovery system has an operating pressure;
• wherein the water-gas compression system compresses the water-gas stream from the syngas and water-gas shift system to the operating pressure of the carbon dioxide recovery system;
• wherein the carbon dioxide recovery system separates the carbon dioxide from the hydrogen contained in the water-gas stream produced by the syngas and water-gas shift system;
• wherein the dehydration system removes water vapor present in the water-gas stream produced by the syngas and water-gas shift system, thereby recovering additional carbon dioxide;
• and
• wherein the carbon dioxide compression system compresses the carbon dioxide recovered from the water-gas stream by the carbon dioxide recovery system and the dehydration system to a carbon dioxide delivery pressure.

A system for generating hydrogen-enriched fuel gas and carbon dioxide comprising:

• (a) means for converting hydrocarbon molecules from a gaseous hydrocarbon feed stream into hydrogen and carbon dioxide;
• (b) means for separating the hydrogen and carbon dioxide;
• (c) means for blending the hydrogen back into the gaseous hydrocarbon feed stream to generate a hydrogen-enriched fuel gas;
• and
• (d) means for utilizing the carbon dioxide for storage or sequestration.

A method of generating hydrogen and carbon dioxide comprising:

• (a) converting hydrocarbon molecules from a gaseous hydrocarbon feed stream into hydrogen and carbon dioxide;
• (b) separating the hydrogen and carbon dioxide;
• (c) utilizing the hydrogen as a separate product;
• and
• (d) utilizing the carbon dioxide for storage or sequestration;
• wherein the carbon dioxide is separated from the hydrogen using a carbon dioxide recovery solvent;
• and
• wherein the carbon dioxide recovery solvent is one or more hydrocarbon liquid(s) selected from the group consisting of butanes, pentanes, hexanes, heptanes, octanes, aromatics, and isomers of butanes, pentanes, hexanes, heptanes, octanes and aromatics.