The pore distribution in activated carbon is crucial for its performance on adsorption processes. In desulfurization applications, the literature highlights the importance of pores from 5 to 10 Å. However, little is known and reported about the range of ultramicropores smaller than 4 Å, which has been found in commercial samples used for H₂S retention. In order to clarify the influence of this fraction of pores on the H₂S retention of typical biogas mixtures, measurements of multicomponent adsorption of hydrogen sulfide in the presence of carbon dioxide for activated carbon samples further impregnated with potassium hydroxide have been performed in column dynamics. Molecular simulation, XRF analysis and textural characterization were applied to aid the study. Results have shown that the H₂S retention capacity in the presence of CO₂ decreased significantly mainly in the impregnated samples. The degree of reduction in H₂S retention indicates that ultramicropores can be of substantial importance through a synergistic immobilizing effect of H₂S molecules. The better understanding of such an effect could improve the development of more efficient adsorbents for chemical industries.

活性炭中的孔分布对于其在吸附过程中的性能至关重要。在脱硫应用中，文献强调了5至10Å孔的重要性。但是，关于小于4Å的超微孔的范围知之甚少，据报道，这种超微孔在用于保留H ₂ S的商业样品中已经发现。为了阐明这部分孔对H _2的影响为了保留典型的沼气混合物，已在色谱柱动力学中进行了二氧化碳存在下硫化氢的多组分吸附测量，以进一步浸渍氢氧化钾对活性炭样品进行吸附。分子模拟，XRF分析和结构表征被用于辅助研究。结果表明，在存在CO ₂的情况下，H ₂ S的保留能力显着降低，主要是在浸渍样品中。H ₂ S保留量的降低程度表明，超微孔可能通过H ₂的协同固定作用而具有重要意义。S分子。对这种作用的更好的理解可以改善化学工业更有效的吸附剂的开发。