泡桐直接液化固体及液相产物的红外光谱分析

The Solid Residue and Iiquid Products of Paulownia Direct Liquefaction Analyzed With FTIR

利用傅立叶变换红外光谱对泡桐以铁粉为催化剂在280-360℃去离子水中直接液化产物进行了分析,通过比较原料与残渣的红外基团差异,考察了反应温度对生物质泡桐直接液化进程及重油和轻油成分的影响.研究表明,以铁粉作为催化剂,反应温度对液化过程具有明显的影响,泡桐中的半纤维素和纤维素在320℃时反应完全;木质素从280℃开始降解,在考察的反应温度范围内,固体残渣中还包含有芳香环结构;最终液化产物重油的官能团受反应温度的影响不大;重油和轻油是复杂的混合物,含有烃、醛、酮、羧酸、酚和酯等各类化合物.

Paulownia was liquefied by water in an autoclave in the reaction temperatures range of 280～360 ℃ with iron powder as the catalyst.Effect of reaction temperature to biomass direct liquefaction process and the composition of heavy oil and water-soluable oil were investigated through compared to the functional group infrared spcetrum differences between raw material and solid residue.The experimental results show that the course of liquefaction was significantly influenced by the reaction temperature.The solid residue,heavy oil and water-soluble oil obtained at different reaction temperatures were analyzed by Fourier Transform Infrared Spectrophotometer（FTIR）.The analytical results show：（1） the cellulose and hemi-cellulose is entirely consumed at 320 ℃,and lignin are depolymerized at 280 ℃,but during the reaction temperature solid residue also contain aromatic ring structure.（2） The functional group of heavy oil is not change during the reaction temperatures.（3） The heavy oil and water-soluble oil is complex compound that contain hydrocarbons,aldehydes,ketones,carboxylic acids,phenols,esters and other compounds.