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The conversion of propanal on large (2–5µm) and small (0.2–0.5µm) crystallite HZSM-5 at 400°C and atmospheric pressure has been studied. Improved catalyst stability was observed on small crystallites due to faster removal of products with the shorter diffusion path length, reducing the formation of coke precursors. As previously shown, C 9 aromatics are the initial aromatics produced from...
The reactivities of propanal and propylene have been compared over HSZM-5 zeolites (Si/Al=45 and 25). Propanal is found to be much more reactive than propylene and to form mostly 2-methyl-2-pentenal and C 9 aromatics as early products in the reaction network. Propylene, in contrast, requires more severe conditions to form C 6 and C 7 aromatics. It is proposed that propanal...
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