Unique Roles of Heteroatoms in the Synthesis of Zeolite Catalysts
- Type: Conference Presentation
- Conference Type: AIChE Annual Meeting
- Presentation Date: November 9, 2021
- Duration: 20 minutes
- Skill Level: Intermediate
- PDHs: 0.50
The first example will highlight a facile and generalizable strategy to synthesize nano-sized zeolites using inexpensive metals as heteroatoms. The latter act as zeolite growth modifiers to reduce crystal size (<100 nm) and/or change the morphology of various framework types (e.g. MEL, MFI and MOR). We will show how these unique features lead to significant improvement in their diffusion properties and hence, their performance in different catalytic applications.
The synthesis of high silica faujasite (FAU) has been a challenge via organic-free routes. We have developed an organic-free method to generate a FAU zeolite (HOU-3) with the highest Si/Al ratio (~ 3). In this presentation, we will discuss a new method to achieve FAU with Si/Al = 3.5 via the addition of zinc oxide in the synthesis gel. In addition, we will demonstrate how this high-silica FAU material performs as a bifunctional catalyst compared to conventional zeolite Y analogues.
Overall, we will show how the judicious selection of heteroatoms can be used to tailor the properties and performance of zeolite catalysts, leading to significant improvements in zeolite properties that extend beyond those obtained by conventional zeolite syntheses.
|AIChE Member Credits||0.5|
|AIChE Graduate Student Members||Free|
|AIChE Undergraduate Student Members||Free|