(401e) Engineering Zeolite Syntheses with Inorganic Structure-Directing Agents
AIChE Annual Meeting
2022
2022 Annual Meeting
Materials Engineering and Sciences Division
AIChE Inorganic Materials Graduate Student Award, Sponsored by Chevron
Tuesday, November 15, 2022 - 4:50pm to 5:10pm
In this presentation, we will discuss strategies for tuning the properties of industrially relevant zeolite crystals in the presence of alkali cations (e.g., Na, Li, and K). We systematically explore how altering the composition of zeolite synthesis mixtures can tune zeolite phase selection. These findings substantiate prior claims that decreasing hydrothermal treatment temperature can assist in the generation of smaller zeolite crystals. We also demonstrate how the judicious selection of silica sources can be used as a design parameter to tailor morphological features of zeolite products. Based on these findings, we propose a comprehensive explanation for the nature of interzeolite transformations. Lastly, we demonstrate several facile approaches to optimize the synthesis of zeolites, such as CHA, in organic-free media. Collectively, these results highlight the significant influence of alkali cations and the tremendous potential for using ISDAs to engineer the physicochemical properties of zeolitic materials.
References
[1] Ghojavand, Sajjad, et al. Journal of Colloid and Interface Science 604 (2021): 350-357.
[2] Maldonado, Miguel, et al. Journal of the American Chemical Society 135.7 (2013): 2641-2652.