Degradation of dodecanethiol in dodecane by γ-irradiation and improvement by sensitization
Degradation of dodecanethiol in dodecane by γ-irradiation and improvement by sensitization
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DOI：
10.1016/j.fuproc.2003.09.001
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发表时间：
2004-08
影响因子：
7.5
通讯作者：
N. Yan;Yanfei Zhao;Dan Wu;J. Jia;Wenfeng Wang;Side Yao
中科院分区：
文献类型：
--
作者：
N. Yan;Yanfei Zhao;Dan Wu;J. Jia;Wenfeng Wang;Side Yao
硫醇等含硫有机化合物广泛分布于石油中。本文提出并研究了一种利用γ射线辐照降解石油中硫醇的精炼方法。采用溶解在十二烷中的十二烷硫醇（DCT）作为石油的模拟物。结果表明，降解反应的化学速率常数可以用一阶速率模型描述。当辐射剂量相同时，低剂量率照射可产生较高的去除效率和较高的能量效率。氧气极大地改善了降解过程，并且所需的辐照剂量显着降低。选择一些化学品作为放射增敏剂来改善十二烷硫醇的降解。丙酮和四氯化碳增强了降解过程，降解效率分别提高了25%以上。十二烷硫醇的主要降解产物是二十二烷基二硫化物。同时，十二烷的降解量很小。这将是通过 γ 辐射降解石油中硫醇化合物的潜在替代方案。
Sulfur-containing organic compounds, such as mercaptans, are widely distributed in petroleum. A novel refining method for the degradation of mercaptans in petroleum was put forward and investigated by means of γ-irradiation in this paper. Dodecanethiol (DCT) dissolved in dodecane was employed as the simulation of petroleum. The results showed that the chemical rate constants for the degradation reaction could be described with the first-order rate model. Irradiation with low-dose rate gave rise to a high removal efficiency and a high energy efficiency when the radiation dose was the same. The degradation process was improved greatly by oxygen, and the demanded irradiation dose was reduced markedly. Some chemicals were selected as radio-sensitizers to improve the degradation of dodecanethiol. The degradation processes were enhanced by acetone and carbon tetrachloride, and the degradation efficiencies increased by over 25%, respectively. The main degradation product of dodecanethiol was didodecyl disulfide. Meanwhile, the amount of degradation for dodecane was slight. It would be a potential alternative to degradation of mercaptan compounds in petroleum by γ-irradiation.