摘要
在1L反应釜中对松木屑进行液化试验,采用3种不同溶剂提取固液混合物,从而得到4相油产物。同时研究了反应温度、催化剂对各相产率和组成的影响。研究结果表明,未加催化剂时,在320℃条件下可获得最大油产率;在300℃条件下使用4种不同催化剂,经分析得出负载Fe3+的分子筛催化剂表现出最好的催化效果,产油率达到42.8%,与未加催化剂相比生物油产率提高了9.7%,渣产率降低了5.8%。采用气质联用(GC-MS)对生物油组分进行分析,结果表明:与未加催化剂相比,改性分子筛可以使生物油中长链化合物所占比例明显减小,而主要物质2,6-二丁基羟基甲苯(BHT)的比例显著提高,达到50%以上。添加金属改性催化剂提高了生物质的产油率而且为生产高附加值的化工产品提供了新途径。
Thermal chemical liquefaction of pin sawdust was carried out in a 1 L autoclave. Solid and liquid products were recovered with three solvents, and four kinds of different oil was obtained. The influence of reaction temperature and catalysts on production rate and composition of the bio-oil was investigated. The results showed that the highest conversion rate of pin sawdust was obtained under the temperature of 320℃ without catalyst. Four different catalysts were used under the temperature of 300℃, the highest conversion rate of pin sawdust was gained with the catalyst of Fe^3＋-exchanged HZSM-5 zeolite, the production rate was 42.8%, rose by 9.7% as compared to no catalyst conditions, meanwhile, the production rate of residue was reduced by 5.8%. components of bio-oil was analyzed by gas chromatography-mass spectrometry （GC-MS）, the results showed that compared with no catalyst, the catalyst of Fe^3＋-exchanged HZSM-5 could make the proportion of the long chain compounds obviously diminish, and the proportion of the main compound butylated hydroxy toluene increased markedly reaching more than 50%. Adding metal-modified catalysts can increase the production rate of bio-oil, and provides a new way for producing high added value chemical product via biomass.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2009年第8期210-214,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金(50678062)
教育部科学研究重点项目(108100)"木质纤维素在超/亚临界协同溶剂中的行为及其催化液化机理研究"
关键词
生物质
液化效果
金属催化剂
反应温度
biomass
liquefaction effect
metal catalyst
reaction temperature
