Production of Eco-Friendly Slurry Fuel from Biomass and Low Rank Coal Mixture by Hydrothermal Treatment

在生物质和低阶煤的循环水热处理过程中，澄清了这些材料的混合物显示理论值和实验值之间的TOC差异，这肯定是由于煤的吸附作用。因此，通过在水热处理期间将生物质与煤混合，期望煤化和提取物的部分吸附。TOC的变化是可预测的，从一个在线监测的吸光度强度在治疗期间。通过间歇和连续处理，研究了处理温度和混合比对处理后材料固相燃料特性的影响。高温处理对两种原料的改性程度影响较大，混合物的改性反应是独立的平行反应。燃料比随着混合比的增加而降低，然而，C、H、N和0的化学成分以及总热值在干无灰基础上几乎相同，与混合比无关。连续试验产生的固相具有与间歇试验相似的总热值。此外，值得一提的是，成功地进行了五小时的连续处理。对液相的表征表明，液相中含有2，6-二甲氧基苯酚、愈创木酚等还原性酚类物质以及乙酸和甲醇。液相有效地将Cr（VI）还原为Cr（III），并且向还原系统中添加熟石灰或生石灰以沉淀物的形式除去几乎所有量的Cr（III）。与使用硫酸铁（I）作为还原剂相比，污泥量减少了1/2 - 1/3。

During circulative hydrothermal treatments of biomass and low rank coal, it is clarified that the blend of these materials reveals a discrepancy in TOCs between the theoretical and experimental values due certainly to the adsorbent effect of the coal. Therefore, coalffication and partial adsorption of extractives are expected by mixing up the biomass with the coal during hydrothermal treatment. TOC variation is predicable from an on-line monitoring of the absorbance intensity during the treatment. Effects of treatment temperature and mixing ratio on the fuel characterization of the solid phase of the treated material were studied by the batch and continuous treatments. The treatment at higher temperature affects more on degree of the upgrading for both the materials and the upgrading reaction of the mixture was independent and in parallel with each other. The fuel ratio decreased as the mixing ratio increased, however, the chemical compositions of C,H,N and 0,and the gross calorific value were almost identical on a dry ash-free basis, independent of the mixing ratio. The continuous test produced the solid phases having a gross calorific value similar to that for the batch test. In addition, it is worth mentioning that a five-hour run of the continuous treatment was conducted successfully. The characterization of the liquid phase clarified that reducing phenols such as 2,6-dimethoxyphenol, guaiacol and etc. as well as acetic acid and methanol were contained in the liquid phase. The liquid phase reduced Cr (VI) effectively to Cr (III) and the addition of slaked lime or quicklime to the reduced system removed almost all amount of Cr (III) as a precipitate. The amount of sludge decreased 1/2 - 1/3 as compared with the use of iron (I) sulfate as a reducer.