Waste Paper Decomposition and Production of Organic Acids by Using Hot Compressed Water
Waste Paper Decomposition and Production of Organic Acids by Using Hot Compressed Water
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压缩热水废纸分解生产有机酸
DOI：
10.3775/jie.83.493
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发表时间：
2004
影响因子：
0.2
通讯作者：
M. Shibata
中科院分区：
文献类型：
--
作者：
N. Yamada;Tsuyoshi Sakaki;M. Shibata
在小型间歇反应器中用热压缩水溶解不同灰分的各种废纸，以考察获得更高水溶性碳转化率的最佳操作条件。当改变反应温度和时间的操作条件时，水溶性碳的转化率的最大值达到50wt%左右，并且发现主要生成甲酸、乙酸和乳酸。碳酸钙含量高的废纸有利于有机酸的产生。以灰分含量为26.3wt%、碳酸钙含量为10wt%的粉煤灰为例，在325 ℃、120 s条件下处理，水溶性炭的转化率约为50wt%，乙酸的转化率为14700 mg/L。过氧化氢的加入改善了废纸的分解性能。在5.2wt%过氧化氢水溶液作为水解介质的情况下，水溶性碳的转化率达到约43wt%，并且在275°C和5 min的温和条件下处理同一飞行物时，总有机酸的产量为13500 mg/L。此外，焦炭粘附到反应器的内壁显着减少。
Various kinds of waste paper with different ash content were solubilized by hot compressed water (HCW) in mini-batch reactor for the purpose of examining an optimum operating condition to yield a higher conversion rate of water-solubilized carbon. When the operating conditions of reaction temperature and time were varied, a maximum value of conversion rate of water-solubilized carbon reached around 50wt% and it was found formic, acetic and lactic acids were mainly produced. Waste paper with higher calcium carbonate content was favorable in producing much more amount of organic acids. As an example, the conversion rate of water-solubilized carbon of about 50wt% and acetic acid of 14700mg/L were obtained, when a flier, 26.3wt% ash content and 10wt% calcium carbonate content, was treated under the condition of 325°C and 120s. Ad-dition of hydrogen peroxide improved decomposition behavior of waste paper. In the case of using 5.2wt% hydrogen peroxide water solution as a hydrolysis medium, conversion rate of water-solubilized carbon reached about 43wt% and total organic acids of 13500mg/L was yielded in the treatment of the same flier despite of a milder condition of 275°C and 5min. Moreover, adherence of char to the inner wall of the reactor was markedly decreased.