Process and apparatus for permanent storage of ardealite

The invention relates to a process and an apparatus for permanent storage of ardealite. The invention specifically relates to a process and an associated apparatus for permanently depositing ardealite and simultaneously permanently sequestering carbon dioxide. The process comprises the following steps: (i) decomposing calcium sulfate contained in ardealite into calcium oxide, sulfur dioxide and water by using hydrogen in a temperature range of 1000-1400 DEG C; therefore, the gas stream contains sulfur dioxide and water, and the solid stream contains the generated calcium oxide product. In a subsequent step (ii), the sulfuric acid production is carried out by converting the sulfur dioxide contained in the gas stream obtained in step (i) into an acid. In step (iii), the calcium oxide contained in the solid stream is carbonized with carbon dioxide in a temperature range of 500-800 DEG C to produce calcium carbonate to obtain the solid material. Finally, the solid material obtained in step (iii) is deposited in a