磷改性失活 TS-1 高效催化 C₅⁼裂解制备C₂⁼/C₃⁼反应的研究

The development of catalytic cracking of pentene to ethene and propene has very important research significance and industrial application value. Its core is high-effciency catalysts. Here，deactivated titanium silicalite-1 （De-TS-1）was developed as catalyst for catalytic cracking of pentene. And P-modified De-TS-1 shows excellent catalytic performance，the ethene and propeneselectivity and single-run lifetime reach 77.1% and 213 h，respectively. Its comprehensive catalytic performance is better than that of the classical ZSM-5 catalyst. Further studies show that the Brønsted properties of De-TS-1 satisfy the basic requirements for high-efficiency cracking of pentene. P modification can further reduce the acid density and acid strength of Brønsted acid in De-TS-1，promoting the main reaction of the target products ethene and propene，and inhibiting the side reactions such as hydrogen transfer reaction and aromatics isomerization reaction during pentene cracking. This development of De-TS-1 as a high efficiency catalyst for pentene cracking process provides a new idea for the recycling of waste catalyst and a new scheme for the development of new solid acid catalyst.