摘要
采用气相色谱 硫化学发光检测器(GC SCD),建立了催化裂化汽油(FCC汽油)中各种硫化物类型分布的分析方法。考察了色谱条件对催化裂化汽油中各种硫化物分离的影响,定性了某催化裂化汽油中的58个硫化物。采用该方法,硫化物中的硫在其质量浓度为0 5～800 0mg/L时,其峰面积与质量浓度呈较好的线性关系,相关系数达0 999,其响应与硫化物的类型无关。FCC汽油中几种主要硫化物(噻吩、正丁硫醇、2 甲基噻吩、3 甲基噻吩、2,4 二甲基噻吩)的浓度测定值的相对标准偏差(RSD)均小于5 0%。当信噪比为3时,测得噻吩硫的检测限为0 1mg/L。将该方法用于某典型催化裂化汽油脱硫前后各种硫化物类型分布的研究,并与气相色谱 原子发射光谱检测方法(GC AED)测硫的数据进行了对比,结果表明两种检测器的定量结果具有较好的相关性。
A method for the separation and determination of sulfur compounds in fluid catalytic cracking gasoline (FCC gasoline) by gas chromatography with a sulfur chemiluminescence detector (GC-SCD) was established. Fifty eight sulfur compounds including mercaptan, sulfide, disulfide, thiophene, alkyl thiophenes, benzothiophene and alkyl benzothiophenes were identified based on their retention indexes and the data obtained from gas chromatography with an atomic emission detector (GC-AED). The effects of flow rate of carrier gas and oven temperature were discussed. Detection reproducibilities of main sulfur compounds (thiophene, n-butyl mercaptan, 2-methylthiophene, 3-methylthiophene, 2,4-dimethylthiophene ) in FCC gasoline were satisfactory (RSDs were no more than 5.0%) and detection limit for sulfur was 0.1 (mg/L). Using thiophene and benzothiophene as testing samples, it was determined that response factor was independent of the molecular structure of sulfur compounds. The linear range was 0.5-800.0 (mg/L) sulfur with a correlation coefficient of 0.999.
出处
《色谱》
CAS
CSCD
北大核心
2004年第3期216-219,共4页
Chinese Journal of Chromatography
基金
国家科技部基础研究规划项目(G200048001)
石油化工科学研究院院控基金资助项目.
关键词
气相色谱-硫化学发光检测
硫化物
汽油
gas chromatography-sulfur chemiluminescence detection
sulfur compounds
(gasoline)
