Cracking of n-heptane with activation of vanadium oxide based catalyst: effect of support and modification by K or P
Cracking of n-heptane with activation of vanadium oxide based catalyst: effect of support and modification by K or P
复制标题
氧化钒基催化剂活化裂解正庚烷：K或P的负载和改性作用
DOI：
10.1007/s11144-018-1511-0
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发表时间：
2018-12
期刊：
影响因子：
--
通讯作者：
Jianliang Xue
中科院分区：
文献类型：
--
作者：
Xiaoyan Hu;Xinlong Yan;Rui Feng;Jianliang Xue
本研究比较了正庚烷在加入VOx/Al_2O_3、VO_x/SiO_2、VO_x/MgO的ZSM-5平衡催化剂上的裂化反应，以及添加了钾或磷的VO_x/Al_2O_3。结果表明，引入不同的VOx/载体催化剂后，催化剂的转化率有较大差异。转化率按基本顺序递减(不使用introduction) <； + VOX/SiO2<； + VOX/MgO <； + VOX/Al2O3.转化率提高的不同程度可能与它们的还原能力密切相关。钾或磷的加入改变了VOx/Al_2O_3的酸性。但这些转变几乎没有受到影响。随着钒系催化剂酸性的增加，催化剂对氢气和芳香族产物的选择性有增加的趋势。结果表明，碱度的提高有利于VOX装置活性中间物种的脱附，从而降低了制氢和生成芳烃的选择性。
In the present study, n-heptane cracking was comparatively investigated over ZSM-5 equilibrium catalyst with introduction of VOX/Al2O3, VOX/SiO2and VOX/MgO, as well as the potassium or phosphorous incorporated VOX/Al2O3. The results showed that the conversion varied significantly with introduction of different VOX/support catalysts. The conversion decreased in the order of Base (without introduction) < + VOX/SiO2< + VOX/MgO < + VOX/Al2O3. The different extent of improvement in conversion could be closely associated with the reducibility of them. The incorporation of potassium or phosphorous modified the acid properties of VOX/Al2O3. But the conversions were barely influenced. There was an increasing trend of selectivity to hydrogen and aromatic products with increasing acidity of the vanadia based catalysts. It was suggested that the improved basicity favored desorption of the active intermediate species from VOXunit, leading to a lower selectivity to hydrogen and aromatics produced.
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DOI：
10.1021/j100373a067
发表时间：
1990-05
期刊：
The Journal of Physical Chemistry
影响因子：
--
作者：
G. Went;S. Oyama;A. Bell
通讯作者：
G. Went;S. Oyama;A. Bell
DOI：
10.1002/chin.200928208
发表时间：
2009-04
期刊：
ChemInform
影响因子：
--
作者：
J. Haber
通讯作者：
J. Haber
影响因子：
5.5
作者：
A. Klisińska;S. Loridant;B. Grzybowska;J. Stoch;I. Gressel
通讯作者：
A. Klisińska;S. Loridant;B. Grzybowska;J. Stoch;I. Gressel
影响因子：
7.3
作者：
Ran Zhu;Anargyros Chatzidimitriou;Jesse Q. Bond
通讯作者：
Ran Zhu;Anargyros Chatzidimitriou;Jesse Q. Bond
影响因子：
7.3
作者：
J. Scholz;Anke Walter;T. Ressler
通讯作者：
J. Scholz;Anke Walter;T. Ressler