为了探讨碱木质素在甲酸盐与Pd /C 体系中的水热解聚特性，选取7 种甲酸盐进行实验，得到最优的工艺条件如下: 甲酸镍和Pd /C 用量( 相对于原料，以质量分数计)10%、反应时间30 min，反应温度325 ℃． 在该条件下，解聚产物中的液相产物得率为56． 24%，4 种单酚总得率为12． 14%． 空白样以及添加了甲酸镍与Pd /C 的液相产物的高分辨质谱、有机元素分析以及热重分析结果表明，甲酸镍和Pd /C 的添加有利于木质素水热反应的脱氧过程，使产物向相对分子质量更小的方向移动．

In order to explore the depolymerization characteristics of alkali lignin in the hydrothermal system with formate and Pd /C,seven kinds of formates were selected to conduct experiments.The results show that optimal conditions are a nickel formate and Pd /C amount ( with respect to raw material) of 10%,a reaction time of 30min and a reaction temperature of 325℃,and under such conditions,the liquid product yield in depolymerization products is 56.24% and the overall yield of four monophenols is 12.14%,By comparing high resolution mass spectra,organic elements and thermogravimetric characteristics of the control sample with those of the sample with nickel formate and Pd /C,it is found that the addition of nickel formate and Pd /C is helpful in the deoxygenation process of hydrothermal reaction of lignin,and causes more products of smaller relative molecular mass to produce.