NDLI: Butene Catalytic Cracking to Propene and Ethene over Potassium Modified ZSM-5 Catalysts

Content Provider	Springer Nature Link
Author	Zhu, Xiangxue Liu, Shenglin Song, Yueqin Xu, Longya
Copyright Year	2005
Abstract	Catalytic cracking of butene over potassium modified ZSM-5 catalysts was carried out in a fixed-bed microreactor. By increasing the K loading on the ZSM-5, butene conversion and ethene selectivity decreased almost linearly, while propene selectivity increased first, then passed through a maximum (about 50% selectivity) with the addition of ca. 0.7–1.0% K, and then decreased slowly with further increasing of the K loading. The reaction conditions were 620 °C, WHSV 3.5 h−1, 0.1 MPa 1-butene partial pressure and 1 h of time on stream. Both by potassium modification of the ZSM-5 zeolite and by N2 addition in the butene feed could enhance the selectivity towards propene effectively, but the catalyst stability did not show any improvement. On the other hand, addition of water to the butene feed could not only increase the butene conversion, but also improve the stability of the 0.7%K/ZSM-5 catalyst due to the effective removal of the coke formed, as demonstrated by the TPO spectra. XRD results indicated that the ZSM-5 structure of the 0.07% K/ZSM-5 catalyst was not destroyed even under this serious condition of adding water at 620 °C.
Starting Page	201
Ending Page	210
Page Count	10
File Format	PDF
ISSN	1011372X
Journal	Catalysis Letters
Volume Number	103
Issue Number	3-4
e-ISSN	1572879X
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2005-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	butene catalytic cracking K modification propene ethene ZSM-5 catalyst Physical Chemistry Industrial Chemistry/Chemical Engineering Pharmacy Catalysis
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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