Synthesis,Desulfurization and Microwave Assisted Air Regeneration Performance of Dawson-Type Molybdovanadophosphoric Heteropolyacid
Synthesis,Desulfurization and Microwave Assisted Air Regeneration Performance of Dawson-Type Molybdovanadophosphoric Heteropolyacid
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发表时间：
2012
影响因子：
0.7
通讯作者：
M. Yun
中科院分区：
文献类型：
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作者：
M. Yun
采用乙醚萃取法合成了Dawson型钼钒磷杂多酸H6+n[P2Mo18-nVnO62](n=1~4)，考察了它们在不同条件下对H_2S的吸收效率，考察了钒的用量、吸收温度、H_2S气体浓度和杂多酸对H_2S的吸收效率。结果表明，H_7[P_2Mo17VO_(62)]的脱硫率是四种中最好的。对用过的H_7[P_2Mo_(17)VO_(62)]进行了微波辐射再生。用红外光谱、X射线光电子能谱(XPS)、X射线光电子能谱(XPS)、红外光谱(IR)、X射线光电子能谱(XPS)等手段对微波再生前后的吸收剂进行了表征氧化还原电位法和化学需氧量测定结果表明，H_2S还原V(Ⅵ)后还原了Mo(Ⅴ)，微波辅助空气再生法能活化O2，促进了杂多酸的再生，是一种优于单一空气再生法的新方法。
Dawson-type molybdovanadophosphoric heteropoly acid H6+n[P2Mo18-nVnO62](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.