甘油-甲醇复合溶剂液化杂木屑实验研究  

Liquefaction of Sawdust Using Glycerin and Methanol Mixture as Solvents

作　　者：杨中志[1,2,3,4] 蒋剑春[1,2,3,4] 徐俊明[1,2,3,4] 胡亿明[1,2,3,4] 

机构地区：[1]中国林业科学研究院林产化学工业研究所 [2]生物质化学利用国家工程实验室 [3]国家林业局林产化学工程重点开放性实验室 [4]江苏省生物质能源与材料重点实验室,江苏南京210042

出　　处：《林产化学与工业》2013年第4期67-72,共6页Chemistry and Industry of Forest Products

基　　金：林业公益性行业科研专项(201204801)

摘　　要：采用甘油-甲醇复合溶剂体系,利用高温高压下甲醇的亚/超临界效应,探索了反应时间、反应温度、催化剂种类及用量等条件对杂木屑液化效果的影响。研究结果表明:甲醇30 g,甘油12 g,草酸0.25 g,粒径在0.28～0.90 mm范围内的混合木屑6 g,在290℃下反应40 min,然后自然冷却至室温,即可获得很好的液化效果,木屑转化率为92.79%。采用GC-MS、FT-IR、GPC等技术手段测定了液化油的物质组成与基团结构,详细研究了水分含量、酸值、黏度等物理学性质。结果表明,液化油的物质构成较复杂,但主要是一些含氧衍生物,包括醇类、醚类、酯类和酚类化合物;液化油主要由小分子物质构成,相对分子质量分布在2 300以下。The mixed sawdust was liquefied by glycerin and methanol as mixed solvents using a 1 L stainless steel high-pressure autovalve. This reaction was carried out at critical/supercritical effect of methanol in high temperature and pressure. The influ- ence of reaction conditions such as reaction time, reaction temperature, catalyst types and dosage on liquefaction reactions was in- vestigated. The results showed that the optimal liquefaction conditions of the mixed sawdust is methanol 30 g, glycerin 10 g, ox- alic acid 0.25 g, mix sawdust 6 g（0.28 -0.90 mm）, at 290~C with reaction time 40 min. Under this reaction conditions, the conversion of sawdust is up to 92.79%. Various analysis methods such as Gas chromatography-mass spectrometer（ GC-MS）, fou- rier transform infrared spectroscopy （FT-IR） and gel permeation chromatography （GPC） were used to analyze the composition and molecular structure of the liquefaction oil. Moisture, acid value, viscosity and other properties of the liquefied product were also studied. The analytical results showed that the liquefaction oil is complex compounds, which mainly contains oxygen derivatives such as alcohol, ether, ester and hydroxybenzene, etc. The liquefaction oil consists of low molecular weight components, i. e. , which is below 2 300.

关 键 词：复合溶剂 亚 超临界效应 木屑 液化 

分 类 号：TQ35[化学工程] TK6[动力工程及工程热物理—生物能]