P-Modified Deactivated TS-1 as an Efficient Catalyst for Catalytic Cracking of Pentene to Ethene and Propene

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 propene selectivity 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 Bronsted properties of De-TS-1 satisfy the basic requirements for high-efficiency cracking of pentene. P modifica-tion can further reduce the acid density and acid strength of Bronsted 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 develop-ment of new solid acid catalyst.