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Operando micro-spectroscopy on ZSM-5 containing extrudates during the oligomerization of 1-hexene†
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2018-03-29 00:00:00 , DOI: 10.1039/c7cy02460f Suzanna P. Verkleij 1, 2, 3, 4, 5 , Gareth T. Whiting 1, 2, 3, 4, 5 , Sonia Parres Esclapez 6, 7, 8, 9 , Machteld M. Mertens 6, 7, 8, 9 , Anton-Jan Bons 6, 7, 8, 9 , Martijn Burgers 6, 7, 8, 9 , Bert M. Weckhuysen 1, 2, 3, 4, 5
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2018-03-29 00:00:00 , DOI: 10.1039/c7cy02460f Suzanna P. Verkleij 1, 2, 3, 4, 5 , Gareth T. Whiting 1, 2, 3, 4, 5 , Sonia Parres Esclapez 6, 7, 8, 9 , Machteld M. Mertens 6, 7, 8, 9 , Anton-Jan Bons 6, 7, 8, 9 , Martijn Burgers 6, 7, 8, 9 , Bert M. Weckhuysen 1, 2, 3, 4, 5
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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 °C and 300 °C. By employing operando UV-vis micro-spectroscopy, coupled with on-line 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.
中文翻译：
1-己烯低聚过程中含挤出物的ZSM-5的Operando显微光谱†
尽管添加粘合剂会引起催化剂性能的显着变化，但是常常忽略了粘合剂材料在工业型催化剂材料中的影响。很难看到这些复合材料中不同成分的作用，因此，需要采用高时空分辨率技术。在这项工作中，两种互补的微光谱技术；用操作紫外可见漫反射光谱（结合在线质谱）和原位共聚焦荧光显微镜研究了1-己烯的低聚反应。反应在Al 2 O 3-和SiO 2上均进行在250°C和300°C下结合ZSM-5的挤出物。通过操作紫外可见光谱，结合在线质谱，发现与SiO 2结合的催化剂相比，与Al 2 O 3结合的催化剂形成更大的反应产物，以及越来越多的烃沉积物。。此外，含Al 2 O 3的挤出物的失活速度比含SiO 2粘合剂的挤出物慢。使用原位共聚焦荧光显微镜观察反应产物位置的时间分辨化学图。这些图表明，反应后，沸石晶体所含的焦炭种类与铝不同。2 O 3粘合剂。
更新日期：2018-03-29
中文翻译：
1-己烯低聚过程中含挤出物的ZSM-5的Operando显微光谱†
尽管添加粘合剂会引起催化剂性能的显着变化，但是常常忽略了粘合剂材料在工业型催化剂材料中的影响。很难看到这些复合材料中不同成分的作用，因此，需要采用高时空分辨率技术。在这项工作中，两种互补的微光谱技术；用操作紫外可见漫反射光谱（结合在线质谱）和原位共聚焦荧光显微镜研究了1-己烯的低聚反应。反应在Al 2 O 3-和SiO 2上均进行在250°C和300°C下结合ZSM-5的挤出物。通过操作紫外可见光谱，结合在线质谱，发现与SiO 2结合的催化剂相比，与Al 2 O 3结合的催化剂形成更大的反应产物，以及越来越多的烃沉积物。。此外，含Al 2 O 3的挤出物的失活速度比含SiO 2粘合剂的挤出物慢。使用原位共聚焦荧光显微镜观察反应产物位置的时间分辨化学图。这些图表明，反应后，沸石晶体所含的焦炭种类与铝不同。2 O 3粘合剂。
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