费托合成详细产物分析方法及产物分布自动生成策略

Detailed product analysis method and product distribution automatic generation strategy for Fischer-Tropsch synthesis

费托合成反应具有产物种类复杂、碳数分布广及收集流程长等特点,产物组分的定性、定量分析涉及多步且繁重的谱峰识别和数据处理工作,耗时耗力且极易产生人为误差。结合最新分析技术,设计并验证了一维色谱分析尾气、水相和油相低碳产物组分,利用二维色谱配置反吹装置分析了油相和蜡相产物(C_(≤30))组分、高温模拟蒸馏分析蜡相产物(C_(31)~C_(100))组分,以及理论外推了C_(100+)产物组分的组合分析方法。借助Python语言的数据处理功能,提出了费托合成详细产物分析及数据自动处理策略,通过深入剖析产物谱峰数据特征,针对不同产物流股提出相应的定量计算方法,最终形成了高效准确的费托合成全产物分布自动处理方案。验证了各种操作条件下产物分布计算的准确性,发现在高链增长因子的费托合成反应条件(温度为275℃、压力为3 MPa、合成气空速为35 L/(g·h)及n(H_(2)):n(CO)=1)下,该方法可确定的产物的最高碳数达164。

Fischer-Tropsch synthesis reaction has the characteristics of complex product types,wide distribution of carbon numbers and long collection process.The qualitative and quantitative analysis of product components involves multiple steps,laborious spectrum peak identification and data processing,which is time-consuming,labor-intensive and easy to produce human errors.Combined with the latest analytical technology,a combination analysis method was designed and verified for the analysis of tail gas,water phase and oil phase low-carbon product components by one-dimensional gas chromatography,oil phase and wax phase products(C_(≤30))components by two-dimensional gas chromatography with backflushing device,wax phase products(C_(31)~C_(100))components by high temperature simulated distillation,and C_(100+)product components by theoretical extrapolation.By using the data processing function of Python language,detailed product analysis and data automatic processing strategies of Fischer-Tropsch synthesis were proposed.Through indepth analysis of product spectral peak data characteristics,corresponding quantitative calculation methods were proposed for different product flows,and an efficient and accurate automatic processing scheme for total product distribution of Fischer-Tropsch synthesis was finally formed.The accuracy of product distribution calculation under various operating conditions was verified.It is found that under the reaction conditions of Fischer-Tropsch synthesis with high chain growth factor(temperature of 275℃,pressure of 3 MPa,syngas space velocity of 35 L/(g·h)and n(H_(2)):n(CO)=1),the maximum carbon number of products determined by this method can reach 164.