5种生物质的微波辅助多元醇液化研究  

Microwave-assisted Liquefaction of Five Types of Biomass in Polyhydric Alcohols

作　　者：李改云[1] 朱显超 邹献武[1] 秦特夫[1] 

机构地区：[1]中国林业科学研究院木材工业研究所,北京100091

出　　处：《林产化学与工业》2015年第1期107-112,共6页Chemistry and Industry of Forest Products

基　　金：国家林业局引进国际先进林业科学技术('948')项目资助(2012-4-28)

摘　　要：将杨木、杉木、毛竹、稻草和汉麻杆芯这5种生物质原料在微波辅助多元醇中进行单一液化和混合共液化,研究生物质原料种类对微波辅助多元醇液化行为的影响。结果表明:杨木和杉木容易液化,其次为毛竹和汉麻杆芯,稻草最难被液化;稻草液化产物的羟值最大,杉木液化产物的羟值最小,说明苯/乙醇抽提物和灰分含量对生物质的多元醇液化有显著的抑制作用。由于稻草液化效果不佳,只将杨木、杉木、毛竹和汉麻秆芯4种生物质混合,在液固比值为2.5和3时,混合生物质的共液化率分别为91%和95%,显著高于毛竹和汉麻杆芯的单一液化率;羟值居于4种单一生物质液化产物羟值的中间;混合共液化产物的化学组分与汉麻杆芯液化产物区别明显,表明混合生物质在多元醇共液化过程中存在协同作用,可以促进难于液化的单一生物质的液化反应。Poplar,Chinese fir,bamboo,rice straw,and hemp xyloid stem were selected to investigate the effects of species on microwave-assisted liquefaction behaviors in polyhydric alcohols. Among the five types of biomass feedstocks,poplar and Chinese fir were easily liquefied,and bamboo and hemp xyloid stem were more difficult to be liquefied than poplar and Chinese fir. But rice straw was the most difficult to be liquefied. While the hydroxyl value of liquefied products（ LP） of rice straw was the highest and that of Chinese fir was the lowest. It was found that both extract benzene-alcohol content and ash content had strong side effects on microwave-assisted biomass liquefaction. When the ratio of polyhydric alcohol to biomass was 2. 5 and 3,co-liquefied fraction of mixed biomass of poplar,Chinese fir,bamboo,and hemp xyloid stem were 91% and 95%,respectively. This was notably higher than the yield of single bamboo and hemp xyloid stem. The hydroxyl value of LP of mixed biomass was close to that of bamboo. And its chemical components differed significantly from hemp xyloid stem. It would conclude that the synergistic effect exited in the co-liquefaction of mixed biomass feedstock.

关 键 词：生物质种类 微波加热 多元醇液化 共液化 

分 类 号：TQ35[化学工程]