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采用NaOH溶液对HZSM-5分子筛进行碱处理,利用XRD、SEM、BET、Py-FTIR四种方法表征改性HZSM-5分子筛,对生物原油有机相、未改性HZSM-5制得生物油有机相与改性HZSM-5制得生物油有机相进行理化特性及成分分析,研究了碱处理HZSM-5分子筛对生物油有机相产物的影响;对使用了120 min的三种失活催化剂进行了热重分析,并对焦炭峰面积进行了积分计算。结果表明,经过碱处理后的HZSM-5分子筛保留了典型的MFI拓扑结构,形成了一定数量的介孔;同时,经碱处理1 h的HZSM-5分子筛催化制得的生物油有机相产物的产率有所增加且理化特性得到提高,其产物中烃类物质的含量显著增加,达到了37.67%,且以单环芳香烃为主;同时改性HZSM-5分子筛对生物油有机相中的酸、醛及酮类物质均有较好的脱除效果,有效地降低了生物油的腐蚀性并提升了生物油的稳定性,热值达到了35.32 MJ/kg;经1 h碱处理的HZSM-5分子筛的总结焦量明显降低。
HZSM-5 molecular sieve was treated with NaOH solution, and the modified HZSM-5 zeolite was characterized by XRD, SEM, BET and Py-FTIR. The bio-oil organic phase and unmodified HZSM- Phase and modified HZSM-5 were used to study the physicochemical properties and composition of the bio-oil organic phase. The effect of alkali-treated HZSM-5 molecular sieve on the bio-oil organic phase was studied. Three deactivated catalysts Thermogravimetric analysis, and the coke peak area was calculated. The results showed that the HZSM-5 molecular sieve retained the typical MFI topology and formed a certain amount of mesopores. Meanwhile, the organic phase products of bio-oil catalyzed by HZSM-5 zeolite treated with alkali for 1 h The yield increased and the physico-chemical properties improved. The content of hydrocarbon in the product increased significantly to 37.67%, which was dominated by monocyclic aromatic hydrocarbons. Meanwhile, the effect of modified HZSM-5 zeolite on the bio-oil organic phase Acids, aldehydes and ketones have a good removal effect, effectively reducing the bio-oil corrosive and enhance the stability of bio-oil, the calorific value reached 35.32 MJ / kg; after 1 h of alkali-treated HZSM -5 molecular sieve coke amount was significantly reduced.