Hydrogen assisted oxy-fuel combustion

A system comprising:

• a combustor comprising an oxygen input port, a fuel stream input port, a carbon dioxide input port, and an exhaust output port;
• an air separation unit in fluid communication with the combustor via the oxygen input port;
• a fuel stream source in fluid communication with the combustor and comprising a fuel source and a hydrogen source;
• and
• a condenser disposed to receive an exhaust from the combustor via the exhaust output port and to return an output stream to the combustor via the carbon dioxide input port.

A system comprising:

• a combustor comprising an oxygen input port, a fuel stream input port, a carbon dioxide input port, and an exhaust output port;
• an air separation unit in fluid communication with the combustor via the oxygen input port;
• a hydrogen enrichment unit in fluid communication with the combustor via the fuel input port;
• a turbine in communication with the combustor via the exhaust output port;
• and
• a condenser disposed downstream of the turbine to receive an exhaust stream from the turbine and to return an output stream to the combustor via the carbon dioxide input port.