| 摘要: |
| 以毛竹粉为原料，无水乙醇为反应介质，98%浓硫酸为反应催化剂，在高压反应釜中液化制备竹粉生物质油。考察反应温度、反应时间、催化剂用量、液固质量比4个因素对竹粉液化率的影响。采用红外光谱仪（FT-IR）分析原料、液化残渣及竹粉生物质油的表面官能团；气质联用仪（GC-MS）分析竹粉生物质油的化学组成。单因素试验结果表明，4个因素对竹粉液化率的影响都存在一个优选值，分别为反应温度160 ℃、反应时间40 min、催化剂用量2%、液固质量比12：1。正交试验结果表明，4个因素影响竹粉液化率大小的顺序为：反应温度>反应时间>液固质量比>催化剂用量。在优化工艺条件下进行了验证试验，竹粉的液化率可达86.44%。试验制备的竹粉生物质油和固体残渣的FT-IR分析结果表明，竹粉中被液化的主要成分是综纤维素，木质素相对较少被液化；竹粉生物质油的GC-MS分析结果表明，生物质油的成分比较复杂，主要包括醇类、酚类、烷烃类、酮类、酸类、酯等化合物。 |
| 关键词: 竹 无水乙醇 液化 生物质 产物表征 |
| DOI：10.11841/j.issn.1007-4333.2014.02.07 |
| 投稿时间：2013-08-14 |
| 基金项目:国家自然科学基金青年基金项目（31100431）；国家大学生创新训练项目（201310389024）；福建农林大学重点学科建设项目（6112c07a7） |
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| Liquefaction of bamboo powder in ethanol and characteristics of liquefaction products |
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LIAO Yi-qiang, GUO Yin-qing, LU Ze-xiang, CHEN Min-chuan, SUN Ying-ying, ZHAO Ying-ting, HUANG Zhen-yong, HUANG Biao
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| (College of Material Engineering, Fujiang Agriculture and Forestry University, Fuzhou 350002, China) |
| Abstract: |
| With ethanol as reaction medium,concentrated sulfuric acid as catalyst,raw material-mao bamboo powder was liquefied into bio-oil in a high-pressure reaction kettle.Analysis was conducted to throw light on the effects of reaction temperature,reaction time,catalyst dosage,ratio of liquid to solid on bamboo powder liquefaction yield;FT-IR was applied to examine raw material,residue and surface functional groups of this bio-oil,whose chemical composition was further analyzed through the use of GC-MS.The results of single factor experiments indicated that the above-mentioned four types of impacts on the bamboo powder liquefaction yield have their own preferred values,respectively,reaction temperature 160 ℃,reaction time 40 min,catalyst mass fraction 2%,the ratio of liquid to solid 12:1 g/g.The orthogonal experiment showed that the significance of the effects of four factors on liquefaction yield can be expressed like this:reaction temperature>reaction time>ratio of liquid to solid>catalyst dosage.The inspection experiment performed under optimal conditions demonstrated that liquefaction yield can reach 86.44% on average.The FT-IR analysis of bio-oil from bamboo powder and solid residue revealed that compared with lignin,much more holocelluloses were liquefied from bamboo powder,while GC-MS analysis showed that the oil produced this way is complex in composition,with some major compounds such as alcohols,phenols,alkanes,ketones,acids,esters. |
| Key words: bamboo ethanol liquefaction biomass characteristics of products |
