Nanosized zeolites prepared by in situ seed-induced synthesis and samples prepared by ion exchanging commercial zeolites were successfully synthesized and modified with zinc. Their catalyst performance was investigated in the dimethyl ether aromatization at high pressures (up to 10 MPa) and various WHSV. The use of in situ seed-induced zeolite leads to a higher yield of arenes (39.1%) against 35.5% over the conventional sample. Zinc modification reduces the total yield of aromatics (by 22%), primarily BTX arenes (by 60%), compared to the parent zeolite. Such behavior correlates with a decrease in acidity and B/L ratio after modification.

中文翻译：

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纳米沸石上的二甲醚芳构化：制备方法和锌改性对催化剂性能的影响

通过原位种子诱导合成制备的纳米尺寸沸石和离子交换市售沸石制备的样品已成功合成并用锌改性。在高压（最高10 MPa）和各种WHSV条件下的二甲醚芳构化过程中研究了它们的催化剂性能。与常规样品相比，原位种子诱导的沸石的使用导致芳烃的产率更高（39.1％），而35.5％。与母体沸石相比，锌改性可降低芳烃的总收率（降低22％），主要是BTX芳烃（降低60％）。这种行为与改性后酸度和B / L比的降低相关。