深埋碳酸盐岩储层中的水与金属氧化物可能会影响到吡咯类含氮化合物的保存。对吡咯—水—氧化铝反应体系进行了热模拟实验研究,根据模拟实验结果,探讨了反应机理,并考察了反应的动力学特征。结果表明,吡咯—水—氧化铝体系可以发生反应,产物主要为呋喃与氨气,升高温度对反应有利。氧化铝对有机氮与无机氧热化学交换作用起到了明显的催化作用,含水量增大不利于反应的进行。在氧化铝存在条件下,吡咯转化为呋喃的反应活化能为109.35 kJ/mol。
The preservation of pyrrolic nitrogen compounds in deep-buried carbonate reservoirs are most likely influenced by water and metallic oxides.In this paper,thermal simulation experiments on the pyrrole-H2O-Al2O3 system were carried out using an autoclave at definite temperature and pressure.The properties of the products were characterized by gas-chromatography and Fourier transform-infrared spectrometry methods to investigate the reaction pathway.On the basis of the experimental data,the reaction mechanism and kinetics of the pyrrole-H2O-Al2O3 system were discussed tentatively.It is found that furan and ammonia were the main products during the reaction,and increasing temperature is favored.Thermochemical exchange effect between organic nitrogen and inorganic oxygen were obviously catalyzed by Al2O3,but inhibited by the increasing volume of water.In the presence of Al2O3,the calculated activation energy of the reaction is 109.35 kJ/mol.