A novel purification technology for raw biogas streams is proposed and it is based on the use of a superacid solution within a bubble column reactor. The solvent is a mixture of sulfuric acid (H₂SO_4(aq), $95.0$ wt.%) and acetic acid glacial (CH₃COOH_(l), $\ge$99.8 vol.%), both commercial grades. A mixture with a molar ratio of 9/1 for H₂SO_4(aq),$/$CH₃COOH_(l) respectively, leads to the interesting physical and chemical absorption properties for biogas treatment.

Process simulations of the technology within a frequently used biomethane production process showed simultaneous capabilities for H₂S elimination, CO₂ absorption and, siloxanes and volatile organic compounds (NMVOCs) complete degradation. A single bubble column reactor was designed for treating $500{\text{N}\text{m}}^3/\text{h}$ of raw biogas with H₂S content between 400 and 1500 ppmv (dry basis) and for handling a solvent volume flow between 10.23 and 23.39 L/min, depending on the H₂S gas content. Proper functioning and hydrodynamic stability of this unit were evaluated in order to avoid possible issues related to bubbles coalescences or break-up, liquid backmixing and mass transfer limitations.

Comparison of the proposed technology with methanol-based and monoethanolamine (MEA_(aq))-based absorption processes allowed proving the low energy demands of the proposed unit and the feasible implementation of the technology.

提出了一种用于沼气原料流的新型净化技术，该技术基于在鼓泡塔反应器中使用超强酸溶液。溶剂是硫酸的混合物（H ₂ SO _{4（水溶液）}，$95.0$ wt。％）和冰醋酸（CH ₃ COOH _（l），$\ge$99.8 vol。％），两个商业级别。H ₂ SO _4（aq）的摩尔比为9/1的混合物，$/$CH ₃ COOH _（l）分别导致了沼气处理中有趣的物理和化学吸收特性。

在经常使用的生物甲烷生产过程中对该技术进行的过程模拟显示，其同时具有消除H ₂ S，吸收CO ₂以及硅氧烷和挥发性有机化合物（NMVOCs）完全降解的能力。设计了一个单鼓泡塔反应器用于处理$500{\text{ñ}\text{米}}^3/\text{H}$H ₂ S含量介于400和1500 ppmv（干基）之间的原始沼气，用于处理溶剂体积流量为10.23和23.39 L / min之间的沼气，具体取决于H ₂ S气体含量。为了避免与气泡聚结或破裂，液体回混和传质限制有关的可能问题，对该单元的正常功能和流体动力稳定性进行了评估。

将所提出的技术与基于甲醇和基于单乙醇胺（MEA _（aq））的吸收过程进行比较，可以证明所提出单元的能源需求低，并且该技术可行实施。