METHOD FOR PRODUCTION OF SULFUR

The present invention relates to process plant comprising a Claus reaction furnace, a Claus waste heat boiler, a SO₃ destruction section and a Claus conversion section, wherein the Claus reaction furnace has an inlet and an outlet, the Claus waste heat boiler has a gas inlet, a gas outlet and optional an elemental sulfur outlet, the SO₃ destruction section has a gas inlet and a gas outlet and the Claus conversion section has a gas inlet, a gas outlet and an elemental sulfur outlet, and wherein the inlet of the Claus reaction furnace is configured for receiving a feedstock gas, sulfuric acid, fuel, an oxidant and an optional sulfuric acid atomization media, and the outlet of the Claus reaction furnace is configured for being in fluid communication with the inlet of the Claus waste heat boiler, wherein the outlet of the Claus waste heat boiler is configured for being in fluid communication with the inlet of the SO₃ destruction section, wherein the outlet of the SO₃ destruction section is in fluid communication with the inlet of the Claus conversion section. The process has the associated benefit of such a process avoiding undesired poisoning (sulfation) of Claus catalyst and contamination of elemental sulfur product with sulfuric acid in the Claus conversion section.