Heat-transfer-liquid-operated turbine and compressor

A method for converting waste heat of exhaust gas to work while

• reducing CO2 emission in the waste heat, comprising:
• feeding into a direct contact heat exchanger an exhaust gas that comprises CO2 and a heat transfer liquid (HTL) that comprises molten salt thereby resulting in mixing the HTL with the exhaust gas and heating of the HTL to obtain heated HTL;
• wherein the HTL comprises a CO2 capturing material, to absorb CO2 from the exhaust gas, and said mixing resulting in the CO2-capturing material capturing the CO2 from the exhaust gas, thereby reducing an amount of CO2 in the exhaust gas;
• operating an HTL-turbine for performing an isothermal or quasi-isothermal expansion with the heated HTL following said mixing;
• and
• producing work using the HTL-turbine;
• wherein interaction of the CO2 capturing material with the CO2 produces a new material which is removable from the HTL;
• wherein the method further comprises removing the new material from the HTL.

A method for converting waste heat of exhaust gas to work while reducing CO2

• emission in the waste heat, comprising:
• feeding into a direct contact heat exchanger an exhaust gas that comprises CO2 and a heat transfer liquid (HTL) that comprises molten salt, thereby resulting in mixing the HTL with the exhaust gas and heating of the HTL to obtain heated HTL;
• wherein the HTL comprises a CO2 capturing material to absorb CO2 from the exhaust gas, and said mixing resulting in the CO2-capturing material capturing the CO2 from the exhaust gas, thereby reducing an amount of CO2 in the exhaust gas;
• operating an HTL-turbine for performing an isothermal or quasi-isothermal expansion with the heated HTL following said mixing;
• and
• producing work using the HTL-turbine;
• wherein said CO2 capturing material solidifies upon absorbing CO2, and the method further comprising removing the CO2 capturing material which has absorbed CO2 from the exhaust gas before reaching the HTL-turbine.