A novel type of integrated chemical chain hydrogen production CO_2 zero emission solid oxide fuel cell/gas turbine/organic Rankine cycle hybrid power system is proposed

which achieves efficient power generation while efficiently separating and capturing CO_2. The system uses methane as fuel and generates hydrogen gas through chemical chain reactions to enter the fuel cell

avoiding carbon accumulation inside the cell.The anode outlet circuit of the cell is connected to the chemical chain

and the gas from the fuel reactor outlet and the cathode outlet of the cell enters the gas turbine to do work. The exhaust waste heat is recovered and utilized by the organic Rankine cycle system

further improving the system efficiency. A complete system model was established and thermodynamic performance analysis was conducted on the system

obtaining the variation laws of system performance with fuel flow rate

fuel utilization rate

battery working temperature

and system working pressure. The results showed that the comprehensive energy utilization efficiency of the system could reach over 74.10%

the electrical efficiency could reach over 62.42%

and the exergy efficiency could reach 57.73%.Sensitivity analysis showed that the system performance reached its optimum when the system working pressure reached 7×10~5 Pa.