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首页> 外文期刊>Catalysis science & technology >Operando micro-spectroscopy on ZSM-5 containing extrudates during the oligomerization of 1-hexene
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Operando micro-spectroscopy on ZSM-5 containing extrudates during the oligomerization of 1-hexene

机译：Operando micro-spectroscopy ZSM-5包含挤出物在天津石化的寡聚化

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摘要

The influence of the binder material in an industrial-type catalyst material is often neglected, although the addition of a binder can cause a significant change in the performance of the catalyst. It is difficult to visualize the effects of the different components in these multi-complex materials, and therefore, high spatiotemporal resolution techniques need to be employed. In this work, two complementary micro-spectroscopic techniques; operando UV-vis diffuse reflectance micro-spectroscopy (coupled to on-line mass spectrometry), and in situ confocal fluorescence microscopy were used to investigate the 1-hexene oligomerization reaction. The reaction was performed on both Al2O3- and SiO2-bound ZSM-5-containing extrudates at 250 degrees C and 300 degrees C. By employing operando UV-vis micro-spectroscopy, coupled with online mass spectrometry, Al2O3-bound catalysts were found to form larger reaction products, as well as more and larger hydrocarbon deposits, compared to the SiO2-bound catalysts. Furthermore, the extrudate containing Al2O3 deactivated slower than the extrudate containing SiO2 binder. Time-resolved chemical maps of the location of the reaction products were visualized using in situ confocal fluorescence microscopy. The maps show that, after reaction, the zeolite crystals contain different coke species than the Al2O3 binder.
机译：粘结剂材料的影响往往是产业型态的催化剂材料被忽视,虽然添加粘结剂导致性能的显著改变催化剂。这些不同的组件的影响multi-complex材料,因此,高时空分辨率的技术需要就业。micro-spectroscopic技术;漫反射率micro-spectroscopy(耦合在线质谱),原位共焦荧光显微镜是用来调查天津低聚的反应。氧化铝,SiO2-bound ZSM-5-containing挤出物在250度和300度C。通过使用operando紫外可见micro-spectroscopy,加上在线质谱,Al2O3-bound催化剂形成更大的反应产物,发现了是吗也越来越多、越来越大的碳氢化合物的存款,相比SiO2-bound催化剂。此外,包含氧化铝的挤出物释放比挤出物包含慢二氧化硅的活页夹。反应产物的位置是可视化使用原位共焦荧光显微镜。地图显示,反应后,沸石晶体包含不同的可口可乐的物种氧化铝粘合剂。

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