Abstract
The physiochemical properties and catalytic performance of zeolite rely on the judicious selection of organic structure-directing agents (OSDAs), among which alcoholamines are rarely used. Here, we report that 6-amino-1-hexanol (AH) can be used as an OSDA for the generation of commercially viable ZSM-22 with a Si/Al ratio window of 35–150. Compared with ZSM-22 derived from commonly used 1,6-diaminohexane (DAH), the samples generated using AH possess improved crystallinity and more intermediate-to-strong acid site, which can be attributed to the stronger host–guest interactions between AH and zeolite framework. In addition, the crystallization process can be accelerated by the use of AH. ZSM-22 catalysts derived from AH outperform the counterpart generated from DAH in hydroisomerization of n-heptane, and improved catalytic activity and isomer yield can be achieved thanks to the presence of abundant acid sites and high crystallinity.
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