| 摘要: |
| 针对注蒸汽开采稠油过程中出现的H2S现象,以稠油中含硫化合物噻吩为研究对象,在室内耐高温高压反应釜中开展了热裂解和水热裂解实验。通过检测反应后的气相产物和液相产物组成,探讨了噻吩热裂解和水热裂解反应的反应路径、断键机理。结果 表明:噻吩水热裂解的主要烃类产物是甲烷和丁烷；噻吩水热裂解的液相中除了大量未反应的噻吩,还包括极少量的烷基噻吩、噻吩基噻吩等噻吩衍生物。质子化作用、一次水解以及二次水解在噻吩水热裂解生成H2S的过程中具有重要作用,C-S键断裂是噻吩水热裂解反应和热裂解反应的重要步骤。 |
| 关键词: 水热裂解 噻吩 反应路径 热裂解 |
| DOI：10.3969/j.issn.1007-3426.2019.01.014 |
| 分类号: |
| 基金项目:国家“十三五”重大科技专项“改善SAGD开发效果技术研究与应用”(2016ZX05012-002)；山东省自然基金“基于稠油水热裂解反应的硫化氢生成机制研究”(ZR2017MEE030)；国家自然科学基金“稠油水热裂解生成硫化氢反应机制研究”(51874333) |
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| Study on the reaction mechanism of thiophene aquathermolysis |
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Cai Jiaxin, Lin Riyi, Ma Qiang, Guo Bin, Liang Jinguo
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College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, Shandong, China
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| Abstract: |
| In this paper, aiming at the phenomenon of hydrogen sulfide (H2S) formation in heavy oil recovery by steam injection, thiophene was selected as the model compound, then the experiments of pyrolysis and aquathermolysis were carried out in the reaction kettle with high temperature and high pressure in lab. Based on testing the content of gas products and liquid products, the reaction paths and broken bond mechanism of pyrolysis and aquathermolysis of thiophene were discussed. The results show that the main hydrocarbon products are methane and butane during the aquathermolysis of thiophene; besides a large number of unreacted thiophene, liquid products include a little of alkylthiophene, thienyl-thiophene and some derivatives. The protonation, primary hydrolysis and secondary hydrolysis are very important in the formation of H2S. The cleavage of the C-S bond is an important step in the aquathermolysis and pyrolysis reaction of thiophene. |
| Key words: aquathermolysis thiophene reaction path pyrolysis |
