Abstract Catalytic cracking recovery of polyolefins is a research hotspot at present. The addition of catalyst also increases the operation cost. So, the product selectivity and stability of catalysts are very important. In this paper, the synthesis and properties of ordered mesoporous Fe-SBA-15and their applications in PP catalytic cracking have been studied. The ordered mesoporous Fe-SBA-15 has been successfully synthesized by the acidity of Fe ion hydrolysis. The specific surface area of synthesized Fe-SBA-15 was between 890 and 750 m2/g, and the average pore size was 8−10 nm. With the increase of Fe/Si ratio, the acid content of the strong acid sites of Fe-SBA-15 also increases, and the acid content of weak acid sites increases first and then decreases. Fe-SBA-15has strong catalytic cracking properties and good cyclic performance. Compared with thermal cracking, the catalytic cracking of PP can shorten the heating time, decrease the solid and gas product. With the increase of Fe/Si ratio, the catalytic activity also increases. Moreover, the cyclic performance test of the catalyst is carried out by Fe-SBA-15 with Fe/Si ratio of 0.15andthe results indicate that it has strong cycle stability.

中文翻译：

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用无酸介质中合成的 Fe-SBA-15 催化裂化聚丙烯生产轻烃油

摘要 聚烯烃催化裂化回收是目前的研究热点。催化剂的加入也增加了运行成本。因此，催化剂的产物选择性和稳定性非常重要。本文研究了有序介孔Fe-SBA-15的合成、性能及其在PP催化裂化中的应用。利用Fe离子水解的酸性成功合成了有序介孔Fe-SBA-15。合成的Fe-SBA-15的比表面积在890~750 m2/g之间，平均孔径为8~10 nm。随着Fe/Si比的增加，Fe-SBA-15强酸位的酸含量也增加，弱酸位的酸含量先升高后降低。Fe-SBA-15具有很强的催化裂解性能和良好的循环性能。与热裂解相比，PP的催化裂解可以缩短加热时间，减少固气产物。随着Fe/Si比的增加，催化活性也增加。此外，该催化剂的循环性能测试采用Fe-SBA-15，Fe/Si比为0.15，结果表明其具有较强的循环稳定性。