Optimal Packing of a Rotating Packed Bed for H2S Removal

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• 作者：Kai Guo ; Jiawu Wen ; Ying Zhao ; Yu Wang ; Zhenzhen Zhang ; Zongxiang Li ; Zhi Qian
• 刊名：Environmental Science & Technology
• 出版年：2014
• 出版时间：June 17, 2014
• 年：2014
• 卷：48
• 期：12
• 页码：6844-6849
• 全文大小：321K
• 年卷期：v.48,no.12(June 17, 2014)
• ISSN：1520-5851

文摘

The existence of H₂S in a system could lead to catalyst deactivation, pipeline corrosion, and environmental pollution. A rotating packed bed (RPB), a novel reactor with high mass transfer efficiency and small dimension, is employed in this study to remove H₂S. For RPB, the most significant section for mass transfer is the end-effect zone of packing. A mathematical model for liquid flow in the packing is established to quantify the length of the end-effect zone. A simple and effective visual experimental method is then proposed to investigate the end-effect zone in the RPB. A gas鈥搇iquid mass transfer experiment is finally employed to confirm the validity of the proposed mathematical model. With the aid of this model, the length of packing of a RPB used for pilot-scale H₂S removal is optimized. The optimized RPB removes 99.8% of H₂S (15 vol % to 0.03 vol %) from the system. The proposed model can help optimize the design of a RPB reactor.