In this study, selective dealumination of Beta zeolites was performed through partially removing the templating agent in Beta zeolites by calcination and then removing the aluminum on the external surface of Beta zeolites with acid treatment. Hydrocracking catalysts were prepared by loading WO₃ onto these dealuminated Beta zeolites. It was shown that the surface SiO₂/Al₂O₃ of selectively dealuminated Beta zeolites was higher than that of conventionally dealuminated samples for the same bulk SiO₂/Al₂O₃, and the hydrogenation activity of the catalyst of the selectively dealuminated Beta zeolites was lower than that of conventionally dealuminated Beta zeolites. The experimental results for tetralin hydrocracking to BTX showed that the catalysts based on the selectively dealuminated Beta zeolites had higher BTX selectivity and lower coke formation rate than that the catalysts based on the conventionally dealuminated Beta zeolites.

本研究通过煅烧部分去除β沸石中的模板剂，然后酸处理去除β沸石外表面的铝，实现β沸石的选择性脱铝。_{通过将 WO 3}负载到这些脱铝的β沸石上来制备加氢裂化催化剂。结果表明，对于相同体积的 SiO 2 /Al 2 O _{3 ，选择性脱铝 Beta 沸石的表面 SiO 2} /Al ₂ O 3高于常规脱铝样品的表面 SiO ₂ /Al ₂ O ₃，选择性脱铝的β沸石催化剂的加氢活性低于常规脱铝的β沸石。萘满加氢裂化制 BTX 的实验结果表明，基于选择性脱铝 β 沸石的催化剂比基于常规脱铝 β 沸石的催化剂具有更高的 BTX 选择性和更低的焦炭形成率。