无机化学学报

Dawson磷钼钒酸的合成、脱硫与微波辅助空气再生

Synthesis, Desulfurization and Microwave Assisted Air Regeneration Performance of Dawson-Type Molybdovanadophosphoric Heteropolyacid

作者	单位
马云倩	山东大学环境科学与工程学院，济南 250100
杨　烽	山东大学化学与化工学院，济南 250100
王　睿	山东大学环境科学与工程学院，济南 250100

摘要: 采用乙醚萃取法制备了Dawson结构磷钼钒酸H_6+n[P₂Mo_18-nV_nO₆₂](n=1~4)，考察了不同钒原子取代数目、吸收温度、H₂S气体浓度、杂多酸吸收剂浓度等条件下，4种杂多酸水溶液对H₂S的吸收效率，发现其中H₇[P₂Mo₁₇VO₆₂]吸收剂具有最佳脱硫性能。采用微波辅助空气再生的方法对脱硫后的H₇[P₂Mo₁₇VO₆₂]吸收剂强化再生，通过红外、X射线能谱着重对吸收前、微波再生前后的H₇[P₂Mo₁₇VO₆₂]吸收剂进行了表征，并通过测定氧化还原电位、化学需氧量(COD)分析了再生前后吸收剂的氧化还原情况，结果表明，H₂S还原V(Ⅴ)之后又进一步还原了Mo(Ⅵ)，微波能够活化氧气从而促进脱硫后吸收剂的再生，是优于单纯空气再生的一种新的再生方法。

关键词: Dawson结构磷钼钒酸脱硫性能单纯空气再生微波辅助空气再生

基金项目:

Abstract: Dawson-type molybdovanadophosphoric heteropoly acid H_6+n[P₂Mo_18-nV_nO₆₂](n=1~4) were prepared using the method of ethyl ether extraction, and the absorption efficiency of H₂S by them was investigated under different conditions reflecting the effects of the number of vanadium, absorption temperature, concentrations of H₂S gas and heteropolyacid. As a result, H₇[P₂Mo₁₇VO₆₂] absorbent showed the best desulfurization capacity of the four. Regeneration of the used H₇[P₂Mo₁₇VO₆₂] was carried out by pumping into microwave irradiated air. The absorbents pre- and post- microwave regeneration were characterized by IR and XPS, while tested by redox potentiometry and chemical oxygen demand (COD). The result showed that H₂S reduces Mo(Ⅵ) after reducing V(Ⅴ), and the regeneration of heteropolyacid was promoted by foregoing microwave assisted air regeneration method which could activate O₂ and therefore was proved to be a new method superior to single air regeneration.

Keywords: Dawson-type vanadium-substituted phosphomolybdic acid desulfurization capacity single air regeneration microwave assisted air regeneration

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马云倩,杨　烽,王　睿.Dawson磷钼钒酸的合成、脱硫与微波辅助空气再生[J].无机化学学报,2012,28(10):2179-2185.

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