高纯气体乙烷及丙烷裂解的动力学研究  

Study on kinetics of high-purity ethane and propane cracking

作　　者：王英超 靳永斌[2,3] 税蕾蕾 黄合庭 程子翔[4] 王长江 

机构地区：[1]中海油能源发展钻采工程研究院湛江实验中心,广东湛江524057 [2]中国科学院南海海洋研究所,广东广州510301 [3]中国科学院广州地球化学研究所,广东广州510640 [4]中国石油大学(北京)地球科学学院,北京102249 [5]中国石油集团测井有限公司油气评价中心,陕西西安710077

出　　处：《断块油气田》2013年第3期311-315,共5页Fault-Block Oil & Gas Field

基　　金：国家自然科学基金项目"C2-C5单体烷烃的硫酸盐热化学反应(TSR)研究"(41002041);中国科学院广州地球化学研究所有机地球化学国家重点实验室开放基金项目"单体气态烃的硫酸盐热化学还原反应(TSR)"

摘　　要：为了探讨烃类气体的生烃动力学与碳同位素动力学的反应机理,为油气勘探的动力学研究提供准确、可靠的依据,在实验室条件下,利用先进的金管高压封闭体系方法,开展高纯乙烷(C2H6)和丙烷(C3H8)气体恒压条件下的热模拟实验,对不同时间点生成的气体进行了组分、碳同位素定量测试。实验结果表明,甲烷的产率随着温度上升不断增加,且在520℃后表现出快速增加趋势,丁烷与戊烷在520℃表现为最高值;高纯乙烷和丙烷样品的碳同位素具有随温度升高而变重的趋势。研究认为,高纯气体样品在恒压热模拟过程中裂解与聚合反应同时发生,且总体上分子量大的化合物比分子量小的稳定性差,各化合物的异构体的绝对量相对于正构体比例很小。Accurate acquirement of precise reaction mechanism of hydrocarbon generation kinetics and carbon isotope kinetics for gaseous hydrocarbon can afford the exact dependable data tbr kinetics study of petroleum exploration. Pyrolysis simulated experiment with constant pressure has been performed on high-purity ethane（C2H6） and propane（C3Hs） using the goht tube close system under laboratol~ eonditions, and the gas generated at different periods was analyzed on quantitative test of composition and carhon isotope. The results of experimental study demonstrated that methane pruduction increases along with temperature, and shows the rapid im＇rease al＇ter 520 ℃, butane and pentane reach a peak value at 520 ℃ carbon isotope fraetionation was distinct and ohvious on high-purity ethane and propane samples. Study results show that the cracking and polymerization reaction were simultaneous in high-purity gas samples during pyrolysis simulated experiment, compound with large molecular weight presents a poorer stability than the compound with small molecular weight. Absolute magnitude proportion of isomer is smaller than that of normal paraffin hydrocarbons in different compounds.

关 键 词：高纯气体 生烃动力学 碳同位素 封闭体系 模拟实验 

分 类 号：TE135[石油与天然气工程—油气勘探]