Shell煤气化制合成气与甲烷重整二氧化碳耦合研究

Shell coal gasification to synthesis gas coupling with CO_2 reforming of CH_4

为了优化化工合成过程,节约资源,减排温室气体CO2,采用Aspen Plus软件,基于Gibbs自由能最小原理,对Shell煤气化制合成气与CH4、CO2耦合过程进行模拟。分析了CH4、CO2、O2三者之间的比例对于重整合成气的影响。结果表明:当CO2/CH4体积比为1.02时,O2/CH4体积比为0.1时,得到氢碳比为0.829。通过灵敏度分析了O2量和压力对反应的影响,O2量的增加,反应温度升高,有利于耦合反应的进行;压力的增加,不利于耦合反应,但是加压可以提高生产强度,因此一般都选用加压条件下进行。

In order to optimize chemical synthesis process,save resources and reduce CO2 emission,the process of Shell coal gasification to synthesis gas coupling with carbon dioxide reforming of methane was simulated by Aspen Plus software based on the minimum of Gibbs free energy. The influence of CH4 ,CO2 ,O2 content on reforming synthesis was investigated. The results showed that,when the volume ratio of CO2 to CH4 was 1. 02,O2 to CH4 was 0. 1,the mass ratio of H2 to CO could reach 0. 829. The effects of oxygen content and pressure on re-action was also investigated through the sensitivity analysis. The increase of oxygen content and temperature was benefit to coupling reaction which was hindered by high pressure. While under high pressure,the production intensity was improved,so the high pressure condition was often be selected.