摘要
为了提高油页岩半焦燃烧特性对以油页岩半焦氧化为主要热源的抚顺油页岩炼油工艺效率,利用扫描电镜与热重分析对450、550、650℃三种不同制焦温度下的抚顺油页岩半焦(J1、J2、J3),进行了表面形态和燃烧特性分析。结果表明,由于挥发分的析出,半焦表面结构变得粗糙,羽化现象严重。由于可燃物质随制焦温度上升析出较多缘故,半焦着火温度随制焦温度的上升而增高,在20℃/min升温速率下,着火温度由J1焦样的384.7℃升高到J3焦样的408.8℃。半焦的活化能在低转化率比在高转化率时要小,这主要是由于在高转化率下,可燃物减少,灰分热阻增加。
In order to improve the efficiency of the oil shale semi-coke combustion characteristics to the Fushun oil shale refining process, which main source of heat is the semi-coke＂ soxidation,three Fushun oil shale semi-coke＇s surface morphology and combustion characteristics with different coke making temperature 450℃ ,550 ℃ and 650 ℃ are reasearched by SEM and TG. The results show that the semi -coke surface becomes rough and serious feathering duing to volatile releasing. TGA data shows that the semi-coke＇s ignition temperature rise with the high semi-coke＇s coke making temperature,the ignition temperature increased to 408.76 ℃ of J3 semi-coke from 384.7 ℃ of J1 semi-coke at 20 ℃/min what mainly duing to releaing more combustible material in coke making process at high temperature. Char activation energy is relatively small in a low conversion rate, the activation energy rises at high conversion rates duing to the reduction of combustible and the obstruction of the ash.
出处
《洁净煤技术》
CAS
2017年第5期67-71,共5页
Clean Coal Technology
基金
国家自然基金资助项目(51274113)
关键词
油页岩半焦
燃烧
着火温度
活化能
转化率
oil shale semi-coke
ignition temperature
activation energy
conversion rates
