摘要
在自制的间歇式高压反应釜中,对煤焦油在超临界水中的改质反应进行了研究。考察了温度、反应停留时间、水密度等对产物分布及组成的影响。通过与N2气氛下的焦油常压热解、高压热解过程所得结果进行对比,表明煤焦油在超临界水中发生了轻质化反应,获得一定量的轻质化油品;超临界水介质的存在还对产气量和过程结焦产生一定的抑制作用。为获得较高的轻组分收率,最佳的反应条件为:450℃左右,反应停留时间约为20min,水密度约为0 40g cm3 在此反应条件下的轻质油收率为51 55w%,比原料中的增加了约30%。
Using a batch autoclave,preliminary study was made on the reaction of coal tar in supercritical water Attention was centered on the influence of temperature, residence time and density of water on both composition and yield of products Experiments were performed between 390?℃～480?℃, solvent density 032?g/cm3～044?g/cm3, and reaction time up to 80?min Compared with the traditional pyrolysis of coal tar under normal pressure or high pressure, it is found that during the upgrading of coal tar in SCW, light oil is increased at the expense of gas and coke products, probably due to the cage effect of SCW in the pyrolysis of coal tar SCW may be an ideal medium for upgrading of coal tar and can suppress gas formation and coking of coal tar In order to get light oil as much as possible, the optimal conditions are: temperature 450?℃, density of water 040?g/cm3 and residence time 20?min The yield of light oil (HS) is 5155w% under these conditions, 30% higher compared with that in the raw material
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2003年第2期103-110,共8页
Journal of Fuel Chemistry and Technology
基金
山西省自然科学基金(20011022)
