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从酸性天然气中脱除硫化氢（H2S）的传统方法，首先是用一种溶剂处理气体，然后在克劳斯装置中从酸气中回收H2S。当采用三级克劳斯装置时，该法回收的硫可达到97％。对于硫磺生产能力小（最多到5t/d）的胺／克劳斯装置，由于燃烧设备（反应炉）的操作困难极多，所以，对于小规模的硫回收装置，通常采用投资费用、操作费用明显减少的硫回收装置还原工艺。许多不同的因素影响了气体脱硫技术的选择，比如组分、气体流量、环境硫回收率要求及CO2／H1S比率。
The traditional method of removing hydrogen sulfide (H2S) from sour natural gas involves first treating the gas with a solvent and then recovering H2S from the acid gas in a Claus plant. When the three Claus unit, the recovery of sulfur up to 97%. For amine / Claus plants with low sulfur production capacity (up to 5 t / d), the operating costs of the combustion unit (reactor) are extremely high and therefore, for small-scale sulfur recovery units, the investment costs, operating costs Significantly reduced sulfur recovery unit reduction process. Many different factors influence the choice of gas desulfurization technologies such as composition, gas flow, environmental sulfur recovery requirements, and CO2 / H1S ratios.