摘要
利用模型化合物对甲苯硫酚 ,借助于气相色谱和质谱等分析手段 ,探讨了硫醇的氧化行为以及烃类化合物和其它非烃化合物对硫醇氧化性能的影响 ,并初步推断其可能遵循的反应机理。结果表明 ,硫醇的热稳定性能好 ,但抗氧化能力差 ;在活泼烃生成的烃过氧化物引发下 ,硫醇容易与柴油中的烯烃发生自由基加成反应和自身的二聚反应 ;催化裂化柴油中的硫醇在活泼烃类物质的存在下 ,容易与其它非烃化合物 (1 萘酚、3 甲基吲哚 )发生复杂的反应 ,生成沸点高、极性强的物质 ,从而导致催化裂化柴油安定性变坏。根据实验结果 ,初步推断了硫醇对安定性影响的可能作用机理。
The objective of this paper is to study the oxidation of thiols in FCC diesel and the mechanism of its effect on the stability of diesel by GC and GC-MS analyses. It is demonstrated that thiols can be easily oxidized by hydro-peroxides. The existence of active hydrocarbons and other non-hydrocarbons in diesel has great effect on the oxidation of thiols. The addition reaction between olefin and thiol can be initiated by the hydro-peroxides produced from the auto-oxidation of active hydrocarbons. The non-hydrocarbons, such as naphthol and alkylindoles, can be further reacted with the products and form the colored compounds with higher boiling point and higher polarity. On the basis of the results, the mechanism of the effect of thiols on the stability of diesel was postulated.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2002年第6期67-72,共6页
Acta Petrolei Sinica(Petroleum Processing Section)
关键词
催化裂化柴油
安定性
硫醇
氧化行为
反应机理
fluidized catalytic cracked diesel
stability
thiols
oxidation
reaction mechanism
