有机盐对生物质快速热解油生成特性的影响

Effect of Organic Salts on Formation Characteristics of Biomass Fast Pyrolysis Oil

采用浸渍法制备了不同甲酸钙负载量的玉米秸秆样品,通过热解装置对其催化生物质快速热解生油能力进行评价,利用元素分析、GC-MS等技术分析了液体产物组分的变化规律,同时以微晶纤维素、木质素为模化物,深入研究了生物质组分间交互作用对甲酸钙催化热解特性的影响。结果表明,纤维素与木质素间的交互作用对甲酸钙催化生物质热解生油过程具有促进作用,增强了生物质组分的裂解反应和加氢反应,当甲酸钙含量为5%时,生物油产率获得最大值为301.2 g·kg^(-1),与秸秆非催化热解相比增幅为6%。甲酸钙对生物油组分具有明显选择性,导致脂肪族化合物含量增加,酚类化合物含量显著降低,而交互作用对二者的形成分别产生了促进和抑制作用效果。

Corn straw samples with different calcium formate loadings were prepared by impregnation method,and the catalytic ability catalyzing biomass fast pyrolysis to generate bio-oil was evaluated by pyrolysis device.The variations of liquid compositions were analyzed by elemental analysis and GC-MS.Moreover,with microcrystalline cellulose and lignin as the model compounds,the effect of the interactions between cellulose and lignin on the catalytic pyrolysis characteristics was studied.The results showed that the interactions promoted the pyrolysis of biomass catalyzed by calcium formate,and enhanced the cracking reactions and hydrogenation reactions of biomass components.When the content of calcium formate was 5%,the maximum yield of bio-oil was 301.2 g·kg^(-1),which increased by 6%compared with the non-catalytic pyrolysis of the straw.Calcium formate had obvious selectivity to bio-oil components,which led to the increase of aliphatic compounds and the decrease of phenolic compounds.The interactions had promoting and inhibiting effects on the formation of both compounds,respectively.