摘要
中国竹类资源丰富,但利用率不高。竹材在加工备料过程中会产生大量的废弃物,造成资源的浪费。液化可将这些废弃的生物质资源转化为良好的节能环保生物质材料。本文选用竹材废料为原料,采用盐酸(37%)、磷酸(85%)和硫酸(98%)三种无机酸在不同温度下对其进行多羟基醇液化试验,分别探讨了催化剂种类、用量和反应温度对液化效果的影响。结果表明,硫酸做催化剂,竹材废料的液化效果较好。在液化时间60min、液化温度150℃、液固比(液化剂/木材)为4.0和硫酸用量6%的条件下,竹材废料的液化率可达95%以上。
Bamboo resources are rich in China, and have been widely used in many aspects. However, its availability is low, lots of residues are produced in the processes of bamboo processing, which lead to the waste of resources. Liquefaction is an effective method, and it can turn these dumped biomass resources into energy-saving and environmental-protecting biomass materials. In order to study the varieties and dosages of the catalysts and reaction temperatures on the liquefaction effects, this paper chooses bamboo wastes as the raw materials, using three mineral acids of hydrochloric acid(37%), phosphoric acid(85%) and sulfuric acid(98%) to conduct the liquefaction tests under different temperatures. Results showed that sulfuric acid(98%) as catalyst has the best liquefaction effect. And it was also found that at temperature 150℃, reaction time 1h, liquid ratio 4 and the content of catalyst 6%, the residue rates can reach above 95%..
