Abstract The synthesis conditions of HZSM-5 zeolite, including crystallization temperature, crystallization time and raw material ratio, were investigated by L32 (48) orthogonal test to specifically optimize its performance in dimethyl ether (DME) aromatization for the first time. Based on the total yield of aromatic products, the synthesis conditions of HZSM-5 zeolite with the best DME aromatization properties were obtained by comprehensive analysis and validation experiments. The relationship between the aromatization performance, crystalline structure, pore structure, and acidity of HZSM-5 zeolite were analyzed. The results showed that the HZSM-5 zeolite accompanied by hierarchical structure, an appropriate Brønsted and Lewis acid content and uniform crystal morphology, was successfully synthesized under optimized conditions. Over this unmodified and un-doped catalyst, the conversion of DME approached to 99.3% and the total yield of aromatics reached was 53.5%. Graphical Abstract

中文翻译：

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正交试验合成具有优异二甲醚芳构化性能的HZSM-5沸石

摘要 通过L32(48)正交试验研究HZSM-5沸石的合成条件，包括结晶温度、结晶时间和原料配比，首次专门优化其在二甲醚(DME)芳构化中的性能。以芳烃总收率为基础，通过综合分析和验证实验，得到了二甲醚芳构化性能最佳的HZSM-5沸石的合成条件。分析了HZSM-5沸石的芳构化性能、晶体结构、孔结构和酸度之间的关系。结果表明，在优化条件下成功合成了具有分级结构、适当的Brønsted和Lewis酸含量和均匀晶体形态的HZSM-5沸石。在这种未改性和未掺杂的催化剂上，二甲醚的转化率接近 99.3%，芳烃的总收率为 53.5%。图形概要