Due to higher thermal and hydrothermal stability, suitable acidity properties, Beta zeolite is considered as promising catalyst for naphtha catalytic cracking process. However, high cost and environmental pollution issue limit its industrial application by using high content of N-containing organic structural directing agent (SDA). In this paper, different SiO₂/Al₂O₃ ratios of Beta zeolites were prepared assisting by seeds induced method with low SDA and cheap industrial silica sol as the silicon source. Physical and chemical properties of as-prepared Beta zeolites were characterized by XRD, N₂ adsorption-desorption, NH₃-TPD, Py-FTIR and SEM. N-Heptane was used as model compound for catalytic cracking performance evaluation. The results showed that Beta zeolite with high SAR was successfully synthesized, which had well defined crystallinity, proper specific surface area and pore structure, high B/L ratio and strong acid site. n-Heptane catalytic cracking performance showed high yield of low-carbon olefins with relative low activity on hydrogen transfer reaction and coke formation.

由于较高的热稳定性和水热稳定性，适宜的酸性，β沸石被认为是石脑油催化裂化过程中很有前景的催化剂。然而，由于使用高含量的含氮有机结构导向剂（SDA），高成本和环境污染问题限制了其工业应用。本文以低SDA和廉价的工业硅溶胶为硅源，辅以种子诱导法制备了不同SiO ₂ /Al ₂ O _{3比的β沸石。采用XRD、N 2}吸附-解吸、NH ₃等手段对制备的β沸石的理化性质进行了表征。-TPD、Py-FTIR 和 SEM。N-庚烷用作催化裂化性能评价的模型化合物。结果表明，成功合成了具有高SAR的β沸石，该沸石具有良好的结晶度、合适的比表面积和孔结构、高B/L比和强酸性位点。正庚烷催化裂化性能表现出低碳烯烃的高收率，而对氢转移反应和焦炭形成的活性相对较低。