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Effect of chemical properties of particle surface on the viscosity and cohesion behavior of coal slurry fuel(CSF).

颗粒表面化学性质对煤浆燃料(CSF)粘度和内聚行为的影响

基本信息

批准号：
03453096
负责人：
MAEDA Shigeru
金额：
$ 1.98万
依托单位：
Kagoshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-03453096/
关键词：
Coal Particle surface Chemical properties Slurry fuel Viscosity Cohesion behavior COM CWM 石炭スラリ-燃料石炭表面の化学

项目摘要

1. Objective By using model-CSF(coal slurry fuel), effect of chemical properties of particle surface on viscosity and cohesion behavior was investigated.2. Results and Discussion (1) Model-COM(coal oil mixture) by use of graphite-clay mineral solid phase. Model-COM consisted of graphite as a carbonaceous material, clay minerals(silica, alumina, kaoline and montmorillonite) as ashes, and liquid paraffin as liquid phase medium. The viscosity of the model-COM increased with increasing amount of silica and kaoline added, whereas its viscosity decreased gradually with increasing amount of montmorillonite added. The cohesion was increased in the order of materials added: alumina< montmorillonite < kaoline < silica. The clay minerals being capable of large oil-absorption tended to cause large viscosity and cohesion.(2) Model-CSF by use of calcium carbonate particle coated with organic carboxylic acids.Calcium carbonate particles were reacted with fatty acids and aromatic carboxylic acids. The chemical properties and hydrophile-lipophile balance on the surface was varied by means of changes both in the chemical species and in the amount of organic acids. Thus, the particles having different chemical properties and having the same particle size, the same size distribution, and the same particle shape. The viscosity and cohesion behavior of COM and CWM prepared with the particles and liquid paraffin or water, respectively, were found to be greatly influenced by difference in the chemical properties of the particle surface, nevertheless the CSF having the same porosity. The viscosity and cohesion behavior were found to be estimated by determining the liquid absorption of the particles used.

1.目的采用煤浆燃料模型，研究煤浆燃料颗粒表面化学性质对煤浆燃料粘度和内聚行为的影响.结果与讨论（1）采用石墨-粘土矿物固相的COM模型。模型COM由石墨作为碳质材料，粘土矿物（二氧化硅，氧化铝，高岭土和蒙脱石）作为灰分，液体石蜡作为液相介质组成。模型COM的粘度随二氧化硅和高岭土添加量的增加而增加，而其粘度随蒙脱土添加量的增加而逐渐降低。内聚性按氧化铝<蒙脱土<高岭土<二氧化硅的顺序增加。粘土矿物吸油量大，粘聚力大。(2)模型-CSF通过使用碳酸钙颗粒与有机羧酸的涂层。碳酸钙颗粒与脂肪酸和芳香族羧酸反应。通过改变化学物种和有机酸的量来改变表面上的化学性质和亲油平衡。因此，颗粒具有不同的化学性质并具有相同的粒度、相同的粒度分布和相同的颗粒形状。COM和水煤浆制备的颗粒和液体石蜡或水，分别的粘度和凝聚力的行为，被发现有很大的影响，在颗粒表面的化学性质的差异，尽管CSF具有相同的孔隙率。发现粘度和内聚行为可通过测定所用颗粒的液体吸收来估计。