Influencing factors of low temperature pyrolysis of powder shale from Yaojie of Gansu province

In order to improve the efficiency of low temperature shale pyrolysis,powder shale from Yaojie of Gansu province was chosen as the research object.Using the tube type heating furnace investigated the influence of productive rate of oil solution on different pyrolysis temperature,temperature holding time,and heat carrier gas flow.The experimental results show that the increasing of pyrolysis temperature give rise to the productive rate of oil first increased and then decreased,the fastest pyrolysis rate reached 7.95% at 540 ℃.Increasing the temperature of the thermostatic time,the oil production rate is improved.Keeping temperature more than 30 min,the pyrolysis oil production rate increase is not obvious.Increasing the gas flow is conducive to carrying of shale oil.When the gas flow rate gets more than 300 mL/min of pyrolysis,oil production rate tends to be stable.At the optimum experimental conditions of raw materials,oil production rate,water production rate and gas production rate are more than the result of carbonization test in aluminium retort.