Claus process has a high efficiency for H₂S-rich acid gas, but when H₂S content is below 50%, methane co-combustion is required to sustain combustion that enhances the operating cost. In this study, two processes are designed that initiate with sulfur combustion. In first process, sulfur combustion generates SO₂ that is mixed with acid gas in catalytic reactors for sulfur recovery. In second process, SO₂ from sulfur combustion is mixed with acid gas in the furnace and in the catalytic units for sulfur production. For feeds with 10–65% H₂S, the optimized sulfur recovery efficiencies varied within 98.3–98.5% for the first process, within 96.8–98.6% for the second process, and within 96–98.2% for the Claus process. The heat recovery in the waste heat boiler remained low for the first process as compared to the Claus process. The suggested process reduces CO and SO₂ emissions from sulfur recovery units for lean acid gas feed.

克劳斯法对富含H ₂ S的酸性气体具有较高的效率，但当H ₂ S含量低于50%时，需要甲烷共燃来维持燃烧，从而增加了运行成本。在这项研究中，设计了两个以硫燃烧开始的过程。在第一个过程中，硫燃烧产生 SO ₂，SO ₂在催化反应器中与酸性气体混合以回收硫。在第二个过程中，硫燃烧产生的SO ₂与酸性气体在熔炉和催化装置中混合以生产硫。用于含 10–65% H _{2 的}饲料S，第一个过程的优化硫回收效率在 98.3-98.5% 内变化，第二个过程在 96.8-98.6% 内变化，克劳斯过程在 96-98.2% 内变化。与克劳斯工艺相比，第一种工艺的废热锅炉中的热回收率仍然很低。建议的工艺减少了用于贫酸性气体进料的硫回收装置的CO 和 SO ₂排放。