不同碱性添加剂和催化剂对稻草共溶剂液化的影响研究

以农业典型生物质(稻草)为原料,Na2CO3、K2CO2和FeHZSM-5为液化催化剂,考察了稻草在高温高压反应釜中的液化行为.实验重点考察了不同碱性物质与催化剂的添加对液化实验的影响,添加NaOH、KOH和催化剂在共溶剂和纯水溶剂液化的液效果对比以及NaOH、KOH和催化剂的添加对共溶剂液化产物性质的影响.反应在300℃下进行,碱性物质和催化剂的添加量均为1 g.结果表明,碱性物质的添加能有效促进稻草在共溶剂中的液化反应,其中添加NaOH的乙醇-水共溶剂液化效果最好,使产物中油1相产率由38.64%提高到53.27%,转化率由85.31%提高到90.54%.通过对产物GC-MS结果对比表明,NaOH可以提高烷烃类物质在生物油中的比例,催化剂FeHZSM-5可以促进芳香族化合物的生成.

Influence of Alkalic Additive and Catalysts on Straw Liquefaction in Mixed Solvent

Liquefaction of straw to produce bio-oil in mixed solven(tethanol-water mixture)was carried out in a 1 000 mL autoclave at 573 K.In the present work,the alkalic additives were NaOH and KOH,while the catalysts were Na2CO3,K2CO3 and Fe ion-exchanging HZSM-5 zeolite catalysts,respectively.The results showed that the bio-oil yield increased obviously by the addition of NaOH.In the NaOH run,the bio-oil yield was enhanced from 38.64% to 53.27%,and the conversion of the liquefaction was increased from 85.31% to 90...