用H2O2再生被H2S污染的天然气吸附剂

考察了吸附剂K-1对H₂S的吸附特性和H₂S滞留比对CH₄吸附能力的影响，研究了H₂O₂溶液浓度对吸附剂性能的影响，以及H₂O₂溶液氧化法在不同H₂S滞留比时吸附剂的再生效率。实验结果显示，吸附剂对H₂S具有很强的吸附能力和吸附不可逆性，滞留H₂S可导致吸附剂对CH₄吸附能力大幅下降；H₂O₂溶液浓度应控制在12% (重量分数)以下，高浓度的H₂O₂溶液会破坏吸附剂本身的孔结构，H₂O₂溶液氧化法对H₂S污染型，尤其是低污染型吸附剂具有很好的再生效果。通过对重复再生吸附剂的结构参数和再生产物的分析，讨论了H₂O₂溶液氧化法的再生机理。

REGENERATION ON NATURAL GAS ADSORBENTS CONTAMINATED BY HYDROGEN SULFIDE THROUGH HYDROGEN PEROXIDE SOLUTION OXIDATION METHOD

The adsorption characteristics of K-1 adsorbent to H_2S and influence of H_2S retention ratio on CH_4 adsorption efficiency of adsorbent were investigated experimentally. It was studied the influence of H_2O_2 solution concentration on adsorbent performance and how the different H_2S retention ratio affects adsorbent regeneration efficiency when applying the H_2O_2 solution oxidation method. The results showed that K-1 adsorbent has a strong adsorption capacity and adsorption irreversibility to H_2S and retained H_2S can largely reduce the adsorption ability of adsorbent for CH_4. The H_2O_2 solution concentration should be controlled below 12% (wt.%) as high concentration could damage the pore texture of adsorbent due to strong oxidization. It was found that H_2O_2 solution oxidation method has good regeneration performance on adsorbent contaminated by H_2S, especially on adsorbent with low H_2S undesorption ratio. The regeneration mechanism was discussed by analyzing the regeneration product and texture parameters of adsorbent which could be recycled.