Abstract
Tuning the morphology of heterogeneous catalysts is of paramount importance for the design of efficient processes and requires detailed information on the physicochemical characteristics of the materials. Four micro-/mesoporous composites with different morphologies were synthesized by a dual-templating method using two-step crystallization with different zeolite seed concentrations. This work demonstrates the dependence of selectivity on the catalyst nature in solid-acid alkylation. It was demonstrated that a high concentration of weak acid sites leads to dialkyltoluene products, whereas a high concentration of strong acid sites is beneficial for other side reactions. It was shown that the morphology of catalysts played a crucial role in solid-acid alkylation. The alkylation mechanism defined in this study with different contributions of weak and strong acid sites could provide a route to the development of effective solid-acid catalysts.
| Original language | English |
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| Pages (from-to) | 1994-2009 |
| Number of pages | 16 |
| Journal | Industrial and Engineering Chemistry Research |
| Volume | 61 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 9 Feb 2022 |
| MoE publication type | A1 Journal article-refereed |
Funding
This work was done as part of the TIPS RAS State Plan. The authors thank A.V. Shubnikov, Institute of Crystallography, RAS, for TEM analysis, Institute of macromolecular compounds, RAS, for NMR spectroscopy, and Dr. A.P. Glotov for his help with low-temperature adsorption-desorption of N2 measurements. The SEM analysis was performed using the equipment of the JRC PMR IGIC RAS.