期刊
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
卷 136, 期 -, 页码 27-34出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jaap.2018.11.005
关键词
Biomass; Catalytic fast pyrolysis; Modified HZSM-5; Core-shell; Silicalite-1; Fluidized-bed
资金
- International (Regional) Cooperation and Exchange Program of the National Natural Science Foundation of China [51561145010]
- National Science Foundation of China for Distinguished Young Scholars [51525601]
- National Natural Science Foundation of China [51676045]
- National Science Foundation of China for Excellent Young Scholars [51822604]
- Scientific Research Foundation of Graduate School of Southeast University [YBJJ1756]
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.
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