PROCESS FOR THE REMOVAL OF HYDROGEN CHLORIDE AND SULFUR OXIDES FROM A GAS STREAM BY ABSORPTION

摘要

In a process for the removal of hydrogen chloride and/or sulfur oxides from a landfill gas stream, which contains impurities such as siloxanes, H₂S, organic and inorganic sulfides and volatile organic compounds (VOCs), the heated gas is passed through a siloxane removal bed, where siloxanes are absorbed and then through one or more sulfur removal beds, where hydrogen sulfide and/or organic sulfides are absorbed. The effluent is passed through a reactor containing an oxidation catalyst enabling catalytic oxidation of VOCs, organic and inorganic CI- and/or S-containing compounds, COS and CS₂ to their respective combustion products, and finally the effluent from the reactor is passed through one or more beds, where hydrogen chloride and/or sulfur oxides are absorbed.