Stand-alone MHD high efficiency power generation method and system

A system for generating a power with high efficiency by a stand-alone MHD power generation apparatus comprising:

• an MHD power generation apparatus having a combustor for combusting a pre-heated CO2-free mixture fuel of hydrogen and coal syngas with pure oxygen, and an MHD generator for producing electric power with combustion plasma as an operational fluid, which is produced in said combustor;
• a coal gasification furnace for converting coal and water into a mixture of coal syngas, carbon dioxide and steam with the use of the high temperature waste heat from said MHD generator;
• a fuel pre-heater for pre-heating said mixture fuel, with the waste heat of the high temperature mixture of coal syngas, carbon dioxide and steam from said coal gasification furnace, and the high temperature MHD exhaust gas which bypassed the coal gasification furnace;
• an iodine-sulfur reaction unit operated with waste heat of said fuel pre-heater for decomposing the water into hydrogen and oxygen by sequential reactions between iodine and sulfur chemicals, wherein the hydrogen is mixed with CO2-free coal syngas sent from a CO2/fuel separator, while the oxygen is sent to said combustor, and is used as a part of the necessary oxidizer, and
• a carbon dioxide/fuel separator for liquefaction of the carbon dioxide by means of isothermal compression and adiabatic expansion, and removal of liquid carbon dioxide from the mixture coal syngas exhausted from said iodine-sulfur reaction unit after being passed through a filter for removal of water and solid potassium sulfate.