Sulphur-Assisted Carbon Capture and Utilization (CCU) Methods and Systems

摘要

Disclosed herein is a system and method for sulphur-assisted carbon capture and utilization. The system includes a sulphur depolarized electrolyser (SDE) for receiving electricity, H₂O and SO₂ and for electrolysing the H₂O and SO₂ to produce hydrogen and sulphuric acid (H₂SO₄), a decomposition reactor for receiving and decomposing the H₂SO₄ into SO₃ and H₂O, wherein the H₂O is recycled to the SDE, a sulphur submerged combustor for converting the SO₃ to SO₂ and producing S_n vapor, a sulphur power plant for combusting S_n vapor to produce SO₂, electricity and heat and for supplying the SO₂ and the electricity to the SDE and for supplying the heat to the decomposition reactor. The hydrogen is delivered to a carbon capture and utilization facility. An optional Flue Gas Desulphurisation (FGD) regenerable system removes SO₂ from flue gas, a CO₂ converter generates COS, and a separator separates the COS from the flue gas.