不溶性硫生产新工艺的研究

Two new processes for the production of insoluble sulfur (IS) were studied in thispaper.One is low temperature polymerization process of sulfur at temperature less than 350℃ and under atmospheric pressure in the presence of catalyst promotor system,aiming at producing medium grade IS.Another is mixed solvent extraction process with a small amount of additive for the production of higher grade IS.In comparison with the old high temperature polymerization and single solvent (carbon disulfide) extraction processes respectively,these two new processes are lower in first cost and operation/maintainance cost,less energy consumption and safe in operation.

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、K2CO3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1g。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。