Abstract In order to inhibit the coke formation on the external surface of HZSM-5 during catalytic fast pyrolysis (CFP) of biomass, core-shell structured HZSM-5@silicalite-1 zeolite catalysts were hydrothermally synthesized through the growth of silicalite-1 along the surface of a commercial HZSM-5. The catalyst characterization results indicate that silicalite-1 outer shell layer was successfully formed on the HZSM-5 core particles. Silicalite-1 coating was proved to be effective to reduce the external acidity as well as keep the internal acidity and channel patency of core HZSM-5 by catalytic probe reactions. The catalytic performances of HZSM-5@silicalite-1 samples in CFP of biomass were investigated using a bench-scale continuous feeding two-stage fluidized-bed/fixed-bed combination reactor. The results show that the productions of olefins and BTX were promoted (especially BTX), while the formations of catalyst coke and PAHs were significantly inhibited after silicalite-1 coating.

中文翻译：

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在台式两级流化床/固定床反应器中通过核壳 HZSM-5@silicalite-1 催化快速热解生物质

摘要 为了抑制生物质催化快速热解 (CFP) 过程中 HZSM-5 外表面上的焦炭形成，通过硅沸石-1 的生长，水热合成了核壳结构的 HZSM-5@silicalite-1 沸石催化剂。商用 HZSM-5 的表面。催化剂表征结果表明，在HZSM-5核颗粒上成功形成了硅沸石1外壳层。Silicalite-1涂层通过催化探针反应被证明可以有效降低外部酸度并保持核心HZSM-5的内部酸度和通道通畅。使用台式连续进料两级流化床/固定床组合反应器研究了HZSM-5@silicalite-1样品在生物质CFP中的催化性能。