کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
43708 | 45984 | 2007 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Study on ethylbenzene and xylene conversion over modified ZSM-5 Study on ethylbenzene and xylene conversion over modified ZSM-5](/preview/png/43708.png)
The effects of modification of H-ZSM-5 on its catalytic performance in the conversion of ethylbenzene (EB) and m-xylene were studied. The methods of silica chemical vapor deposition and 5,6-benzoquinoline adsorption can inactivate the external surface of ZSM-5, thus suppressing disproportionation and transalkylation side reactions with which isomerization selectivity and xylene yield increase at the expense of EB conversion and p-xylene yield. In contrast, platinum impregnation cannot only retard the side reactions but can also enhance EB conversion, p-xylene yield and catalyst stability. Combining those simple techniques into a multiple modification procedure provoked a synergistic effect enabling optimum design of a Pt/Si/ZSM-5 catalyst. According to reaction mechanisms, the present paper also briefly reviews different generations of commercial isomerization processes.
A multiple modification technique of H-ZSM-5, by combing silica chemical vapor deposition, 5,6-benzoquinoline adsorption and platinum impregnation, was developed having higher p-xylene yield and lower xylene loss than the existing commercial catalysts in the conversion of ethylbenzene (EB) and m-xylene.Figure optionsDownload as PowerPoint slide
Journal: Applied Catalysis A: General - Volume 321, Issue 2, 11 April 2007, Pages 125–134