摘要
为了研究生物质在熔盐中的热裂解特性,在自行设计的生物质热裂解反应器中,以熔盐热裂解生物质,考察了裂解温度、FeCl2含量和原料种类对生物质热裂解特性的影响,测定了生物油的物性参数,并用气相色谱-质谱(GC-MS)分析了生物油的主要组成。结果表明:在物质的量比为7︰6的ZnCl2和KCl混合熔盐中添加物质的量分数为5%FeCl2裂解生物质,温度对热裂解的影响显著,生物油得率随温度先升高后降低,存在最大值,以水稻秸秆为原料相对应的温度为525℃,最高生物油得率约为18%;添加FeCl2能提高生物油得率;以纤维素为原料裂解制得的生物油含水率小于以水稻秸秆为原料的生物油含水率;生物油含水率较高,其密度与水相近,黏度比水略大,灰分少,pH值为2.5～3.0;生物油成分复杂,含甲氧基类有机物较多,需改性后使用。该研究为熔盐热裂解生物质制取生物油提供了参考依据。
With the aim of study characteristics of biomass pyrolysis in molten salt,experimental studies on characteristics of biomass pyrolysis in molten salt were carried out in a self-designed reactor.Effects of pyrolysis temperature,FeCl2 addition quantity in ZnCl2-KCl（with mole ratio 7/6）and biomass material on pyrolysis behavior of biomass were investigated.Pysical properties of bio-oil were measured,and main compositions of bio-oil were analysised by GC-MS.Pyrolysis process greatly depended on temperature and the yield of bio-oil increased at first and then decreased with the increasing of temperature.While the FeCl2 addition quantity was 5%,the best pyrolysis temperatures of rice straw was about 525℃,and bio-oil yield relatively high,could reach 18%,respectively.FeCl2 addition in molten salt could increase bio-oil yield.Water content of bio-oil produced from cellulose was much less than that from rice straw.Bio-oil was a kind of liquid with high water content and low ash,and its density was close to water, and viscosity was bigger than water,pH value was between 2.5 and 3.0.Components of bio-oil were very complexity, while methoxy group was relatively high.Bio-oil need to be refined before application.The research provides a scientific reference for production of bio-oil with molten salt.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2010年第4期243-247,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金资助项目(20876150)
浙江工业大学校科研基金资助项目(X1018172)
