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The influence of porosity and active sites of zeolites Y and beta on the co-cracking of n-decane and 2-ethylphenol
Applied Catalysis A: General ( IF 4.7 ) Pub Date : 2017-12-02 , DOI: 10.1016/j.apcata.2017.11.026
Moritz Heuchel , Christian Dörr , Roman Boldushevskii , Swen Lang , Elias Klemm , Yvonne Traa

We investigated the cracking of n-decane and 2-ethylphenol as co-substrate in a 90/10 wt.-% mixture over zeolites Y and beta. The use of these substrates aimed to better understand the occurring chemistry in applications such as Co-FCC. We employed a number of different zeolites Y with different amounts of active sites and pore volumes. Additionally, the pore system of zeolite beta was modified by basic leaching. The materials were characterized by N2 physisorption, ICP-OES, XRD, 27Al, 1H, 13C MAS NMR, NH3-TPD, IR and TGA. It was found that the activity of the catalysts depends on the number of Brønsted acid sites as determined by NMR spectroscopy. Also most important is the mesopore volume/mesopore surface which is beneficial for the diffusion towards the micropores, especially for zeolite Y that is able to deoxygenate phenols.



中文翻译:

Y和β分子筛的孔隙率和活性位对正癸烷和2-乙基苯酚共裂的影响

我们研究了在Y /β沸石上以90/10 wt .-%混合物的正癸烷和2-乙基苯酚作为共基质的裂化。这些基材的使用旨在更好地了解诸如Co-FCC之类的应用中发生的化学反应。我们使用了许多具有不同数量的活性位点和孔体积的不同的沸石Y。另外,通过基本浸提对沸石β的孔系统进行了改性。该材料通过N 2物理吸附,ICP-OES,XRD,27 Al,1 H,13 C MAS NMR,NH 3进行表征-TPD,IR和TGA。发现催化剂的活性取决于通过NMR光谱测定的布朗斯台德酸位点的数目。同样最重要的是中孔体积/中孔表面,其有利于向微孔的扩散,特别是对于能够使酚脱氧的沸石Y。

更新日期:2017-12-02
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