基于偏最小二乘回归模型探究生物质理化性质对生物炭孔结构形成的影响
Investigating the influence of biomass physicochemical properties on biochar pore structure formation based on partial least squares regression
为揭示生物质理化性质对生物炭孔结构形成的影响规律,利用偏最小二乘回归模型系统分析生物质组成特征与生物炭孔结构参数之间的关系。纤维素含量较高且灰分较低的生物质有利于形成高比表面积、以微孔为主的孔结构;富含碱金属和碱土金属元素的生物质可促进孔隙扩展并增加介孔比例,但过高的无机矿物含量不利于孔结构稳定;木质素和碳含量较高的生物质易形成致密碳骨架,对孔径扩展具有抑制作用。研究结果为生物炭原料筛选及孔结构定向调控提供了参考。
To elucidate the influence of biomass physicochemical properties on the formation of biochar pore structures,the relationships between biomass composition characteristics and biochar pore structure parameters were systematically analyzed through the partial least squares regression model.The results indicate that biomass with higher cellulose content and lower ash content is more favorable for the formation of biochars with high specific surface area and predominantly microporous structures.Biomass rich in alkali and alkaline earth metal elements promotes pore development and increases the proportion of mesopores;however,excessive inorganic mineral content is detrimental to pore structure stability.In contrast,biomass with higher lignin and carbon contents tends to form dense carbon frameworks,thereby inhibiting pore enlargement.These findings provide a useful reference for biomass feedstock selection and the directional regulation of biochar pore structures.
biomass / biochar / partial least squares regression / multivariate analysis
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国家自然科学基金(22178227)
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