In this paper,the temperature rise characteristics of Huadian oil shale,its semi-coke and mixture were examined in the microwave field.The results showed that oil shale was a poor microwave absorbing material and can ...In this paper,the temperature rise characteristics of Huadian oil shale,its semi-coke and mixture were examined in the microwave field.The results showed that oil shale was a poor microwave absorbing material and can not be pyrolyzed while semi-coke produced can be used as microwave absorbent due to its high heat-up rate in the microwave field.The mixture of oil shale and semi-coke can be pyrolyzed by microwave radiation.The pyrolysis in the microwave field was performed and the effect of mixed ratio,microwave power and particle size were discussed.It was found that the more the semi-coke added,the more the oil yield produced.The higher the microwave power,the more the oil yield and gas loss,while the less the semi-coke yield in the same time.The influence of particle size was small on the pyrolysis except the particle size <0.2 mm due to its serious entrainment in the experiment.展开更多
采用美国Perk in E lm er公司生产的Pyris1 TGA热重分析仪,对桦甸油页岩半焦进行燃烧特性试验研究,得到3种不同升温速率下的油页岩半焦燃烧特性曲线,并使用平均质量反应性指数和燃烧稳定性指数对半焦反应性加以评价。油页岩半焦燃烧分...采用美国Perk in E lm er公司生产的Pyris1 TGA热重分析仪,对桦甸油页岩半焦进行燃烧特性试验研究,得到3种不同升温速率下的油页岩半焦燃烧特性曲线,并使用平均质量反应性指数和燃烧稳定性指数对半焦反应性加以评价。油页岩半焦燃烧分燃烧快速段、过渡段和燃烧慢速段3个阶段进行。随着升温速率的提高,在燃烧快速段,表观活化能为133.901 3—100.204 2 kJ/mol;在燃烧慢速段,表观活化能为146.317 1—211.409 3 kJ/mol。利用Coats-Redfern法确定了燃烧快速段反应级数为3,而燃烧慢速段则为5.5,从而得到油页岩半焦燃烧化学反应的动力学参数,为油页岩半焦的有效开发与经济利用提供了理论依据。展开更多
文摘In this paper,the temperature rise characteristics of Huadian oil shale,its semi-coke and mixture were examined in the microwave field.The results showed that oil shale was a poor microwave absorbing material and can not be pyrolyzed while semi-coke produced can be used as microwave absorbent due to its high heat-up rate in the microwave field.The mixture of oil shale and semi-coke can be pyrolyzed by microwave radiation.The pyrolysis in the microwave field was performed and the effect of mixed ratio,microwave power and particle size were discussed.It was found that the more the semi-coke added,the more the oil yield produced.The higher the microwave power,the more the oil yield and gas loss,while the less the semi-coke yield in the same time.The influence of particle size was small on the pyrolysis except the particle size <0.2 mm due to its serious entrainment in the experiment.
