HZSM-5对藻类二元模型混合物水热液化的影响

Effect on the Hydrothermal Liquefied Bio-Oil of Algae Binary Model Mixtures by HZSM-5

摘要: 以藻类生物质二元模型混合物为对象，在其水热液化过程中引入HZSM-5催化剂，考察HZSM-5用量对水热液化的生物油产率和热值的影响；对生物油进行GC-MS表征，推测了藻类生物质水热液化中生物油可能的形成路径，并探究了HZSM-5对生物油形成路径的影响。结果表明，对于蛋白含量较高的多糖–蛋白二元模型混合物，HZSM-5的加入促进了生物油产率的提高和热值的增加；多糖–脂类二元模型混合物的液化生物油的产率和热值在HZSM-5用量为7%时分别高达45.30%和40.69 MJ/kg；蛋白–脂类二元模型混合物的水热液化在HZSM-5用量为5%时，生物油产率最高为50.45%，生物油热值在HZSM-5用量为3%时，最高达到了41.34 MJ/kg。引入HZSM-5显著影响了二元模型混合物之间的相互作用，如美拉德反应、酯化反应和酰胺化反应。

Abstract: Taking binary model mixtures of algae biomass as objects, HZSM-5 catalyst was introduced in the hydrothermal liquefaction (HTL) process to investigate the effect of HZSM-5 dosage on the yield and higher heating value (HHV) of bio-oil. Furthermore, the bio-oil was characterized by GC-MS. The possible formation path of bio-oil produced from binary model mixtures HTL was presumed, and the influence of HZSM-5 on formation pathway of bio-oil was explored. Results showed that the addition of HZSM-5 promoted the increase of bio-oil yield and HHV for polysaccharides-proteins binary model mixtures with higher protein content. The yield and HHV of liquefied bio-oil for polysaccharides-lipids binary model mixtures were as high as 45.30% and 40.69 MJ/kg respectively when the amount of HZSM-5 was 7%. When the amount of HZSM-5 was 5%, the yield of bio-oil was up to 50.45% for proteins-lipids binary model mixtures, and the highest bio-oil HHV was 41.34 MJ/kg when the dosage of HZSM-5 was 3%. The introduction of HZSM-5 significantly affected the interaction between binary model mixtures, such as Maillard reaction, esterification reaction and amidation reaction.