Selective oxidation of cyclopentene to glutaraldehyde over the WO3/SiO2 catalyst

Selective oxidation of cyclopentene to glutaraldehyde over the WO3/SiO2 catalyst
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WO3/SiO2 催化剂选择性氧化环戊烯生成戊二醛

DOI:
10.1016/j.apsusc.2008.08.094
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发表时间:
2008-12
影响因子:
6.7
通讯作者:
Qu, Zhenping
Qu, Zhenping
中科院分区:
材料科学1区
文献类型:
--
作者:
Chen, Guohua;Li, Xinyong;Wang, Yuxin;Lu, Guang;Qu, Zhenping

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以工业硅胶为载体,采用超声-浸渍复合法制备了WO3/ sio2催化剂。通过BET、XRD、Raman、FT-IR和XPS表征结果,探讨了wo3负载、煅烧温度等因素对戊二醛收率的影响。研究发现,在wo3处于非晶态时,戊二醛的产率随着wo3负载量的增加和煅烧温度的升高而迅速增加,在非晶态wo3开始向结晶转变时,戊二醛的产率达到最大值。而在wo3已经转化为结晶的情况下,随着wo3负荷量的增加和煅烧温度的升高,戊二醛的产率降低。结果表明,WO3晶态的形成以及WO3与sio2的相互作用是提高WO3/ sio2催化剂活性的关键因素。
The WO3/SiO2catalyst was prepared by sonication–impregnation combination approach using commercial silica gel as support. Influences of various factors on the yield of glutaraldehyde, such as WO3loading and calcination temperature, were investigated and discussed in terms of the characterizations results of BET, XRD, Raman, FT-IR and XPS. It was found that the yield of glutaraldehyde increased rapidly with increase of WO3loadings and calcination temperatures while WO3was in the amorphous state, which reached the maximum value when amorphous WO3started transforming into the crystalline form. Whereas, the yield of glutaradehyde decreased with further increase of WO3loadings and calcination temperatures while WO3has already transformed into the crystalline form. It is concluded that the formation of crystalline WO3species and the interaction of WO3with SiO2play a key role for improving the activity of the WO3/SiO2catalyst.
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