催化氧化净化黄磷尾气中的磷和硫
1.昆明理工大学环境科学与工程学院,昆明 650093
2.德国凯泽斯劳腾大学 D-67653 Kaiserslautern,Germany
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摘要
利用黄磷尾气生产甲酸、乙酸以及甲醇等高附加值产品,净化预处理成为制药其应用的瓶颈问题。研究了用普通活性炭和自制催化剂KU2催化氧化净化黄磷尾气的方法;讨论了固定床系统中常压下、温度20~140℃,催化剂上磷和硫化氢的吸附特征。KU2和活性炭都能通过催化氧化过程有效脱除黄磷尾气中的P4,PH3和H2S杂质,随着反应温度和氧含量增加可显著提高净化效果,在最优条件下,经催化氧化净化后的总磷含量<5mg/m3,硫化氢<5mg/m3,失效后的催化剂易于再生,催化剂经多次再生后催化性能恢复良好;提出了活性炭固定床稳定流动吸附过程的数学模型,测得了总传质系数,从实验和理论计算两方面分析讨论了该体系吸附过程的动力行为,模型计算结果与实验测定的穿透曲线吻合良好。
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