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.