Industrial Applied and Modeling Research on Selective H2S Removal Using a Rotating Packed Bed

Industrial Applied and Modeling Research on Selective H2S Removal Using a Rotating Packed Bed
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旋转填充床选择性脱除H2S工业应用及模型研究

DOI:
10.1021/ie2027266
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发表时间:
2012-06
期刊:
Ind. Eng. Chem. Res.
影响因子:
--
通讯作者:
Kai Guo
Kai Guo
中科院分区:
其他
文献类型:
--
作者:
Zhi Qian;Zhen-Hu Li;Kai Guo

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对于甲基二乙醇胺 (MDEA) 溶液同时吸收 H2S 和 CO2,MDEA 实际上对 H2S 和 CO2 都具有选择性。它对 H2S 具有动力学选择性,对 CO2 具有热力学选择性。采用旋转填充床(RPB)选择性脱除H2S,解决了传统脱硫工艺中伴随H2S同时脱除大量CO2的问题。 RPB 强调 MDEA 对 H2S 具有动力学选择性,并限制其对 CO2 的热力学选择性。在这项工作中,进行了 MDEA 选择性吸收 H2S 的工业试验。与传统塔相比,RPB 在选择性吸收 H2S 方面具有显着优势。建立了基于渗透理论的反应-平衡-传质模型来描述液膜中CO2-MDEA反应的选择性吸收过程以及对H2S吸收的抑制作用。
For the simultaneous absorption of H2S and CO2 into methyldiethanolamine (MDEA) solution, MDEA in fact is selective toward both H2S and CO2. It is kinetically selective toward H2S and thermodynamically selective toward CO2. Selective H2S removal using a rotating packed bed (RPB) solves the problem that a large amount of CO2 accompanying H2S is simultaneously removed in the conventional desulfurization process. An RPB highlights that MDEA is kinetically selective toward H2S and restricts its thermodynamically selectivity toward CO2. In this work, an industrial test for MDEA selective absorption of H2S was performed. Compared with a conventional tower the RPB has a substantial advantage in selective absorption of H2S. A reaction–equilibrium–mass transfer model based on penetration theory is developed to describe the selective absorption process and the inhibition effect on H2S absorption from the CO2–MDEA reaction in the liquid film.
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