• 关键词：H₂S  钼硅酸  化学吸收  硫磺

• 基金项目：上海市科委启明星计划的资助

• 赵由才
• 同济大学环境工程学院,上海 200092

• 鲍晓军
• 北京石油大学化工系

• 王贤清
• 北京石油大学化工系

• 祝优珍
• 上海轻工业专科学校

• 摘要：首次报道了杂多酸溶液化学吸收从气流中脱除H₂S制硫磺之新工艺。实验结果表明,气流中H₂S脱除效率与溶液酸度、杂多酸浓度、H₂S含量以及温度、停留时间有关。吸收的最佳酸度为0.1mol/dm³H₂SO4,此时H₂S的脱除率可达99%以上。对吸收机理进行了研究。通过对比纯硫磺和H₂S转化物的热分析图谱和化学分析,确证了杂多酸在吸收H₂S过程中,H₂S被氧化为硫磺,杂多酸被还原为单电子杂多兰。杂多兰易被Cl₂,FeCl₃和NO_x氧化而再生。

• Abstract：Removal of H₂S and recovery of sulfur by chemical absorption into 2-molybdosilicic acid solution was initiated. The experimental results showed that the removal of H₂S from gas streams was a function of concentrations of H₂S and 12-molybdosilicic acid,acidity of solutions,temperature and contact time of gas and solutions. The optium acidity for H₂S absorption was found to be 0. 1 mol/dm³ H₂SO₄ where the removal of H₂S from gas streams can be over 99%.The chemical absorption mechanism was investigated in datail. It was found that the H,S in gas streasm was oxidized into elemental sulfur. More than 95% sulfur produced can be recovered. The 12-molybdosilicic acid (H. SiM₁₂ (Ⅵ)O₄₀) was reduced to H₅SiMo₁₁ (Ⅵ)Mo(Ⅴ)O₄₀ by H₂S. The molybdenum blue solution can be regenerated easily by chemical oxidation with NO₂, Cl₂, and FeCl₃.

• Key words：H₂S  molybdosilicic acid  chemical absorption  sulfur

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