【摘要】 采用热解气相色谱仪 (Py—GC) ,对东营凹陷烃源岩可溶有机质中的沥青质进行了热解模拟实验。考察了蒙脱石和K2 CO3 介质对沥青质催化降解过程的影响 ,求得了沥青质的催化降解动力学参数。结果表明 ,在K2 CO3 介质存在下 ,沥青质热解生成气态烃、轻烃和重烃的收率均有明显的提高 ,模拟温度下总检测烃收率提高了约 2 0 % ;在蒙脱石介质存在下 ,除重烃收率下降外 ,气态烃和轻烃收率均有所提高 ,模拟温度下总检测烃收率提高了约 10 %。与之相对应 ,除蒙脱石存在下重烃的生成活化能有所增加外 ,介质的存在均不同程度地降低了其它各热解产物的生成活化能。最后 ,对沥青质的催化降解机理进行了初步的探讨更多还原

【Abstract】 The thermal simulation experiments on the catalytic degradation of Dongying asphaltene have been carried out by using pyrolysis gas chromatography at the presence of mineral and salt. The isothermal experimental data are used to develop a kinetic model of the generation of the pyrolysates including gas hydrocarbon, light hydrocarbon and heavy hydrocarbon. It is found that K 2CO 3 acts as a catalyst to promote the generation of all pyrolysates. At the temperature of 570 ℃, the yield of total hydrocarbons is increased by about 20% in the presence of K 2CO 3. Montmorillonite increases the yeild of gas and light hydrocarbon but decreases the yield of heavy hydrocarbon. At the temperature of 570 ℃, the yield of total hydrocarbons is increased by about 10% in the presence of montmorillonite. The higher activation energy is obtained for the generation of heavy hydrocarbon in the presence of montmorillonite while the lower activation energies are calculated for other pyrolysates. Finally, the mechanism of catalytic degradation of asphaltene is tentatively investigated.更多还原