基于DRM的天然气制氢减排与甲醇联产方案及关键参数优化  

Hydrogen production from natural gas for emission reduction and methanol cogeneration scheme based on DRM and optimization of key parameters

作　　者：雷子航 刘桂莲[1] LEI Zihang;LIU Guilian(School of Chemical Engineering and Technology,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学化学工程与技术学院,陕西西安710049

出　　处：《石油化工》2024年第9期1294-1301,共8页Petrochemical Technology

基　　金：国家自然科学基金项目(22078259)。

摘　　要：基于甲烷CO_(2)重整(DRM)建立了天然气制氢减排与甲醇联产耦合系统,利用DRM反应处理天然气制氢工艺废气并生产甲醇,实现天然气制氢系统的碳减排和资源化利用。基于反应平衡和甲醇合成反应经验模型建立了耦合系统的Aspen Plus模拟模型和高效分析优化数学模型,并对关键参数进行了优化。模拟结果表明,DRM的最佳温度范围为805~825℃;在甲烷水蒸气重整(MSR)温度为850℃时,甲烷补充量、水蒸气补充量和DRM温度的最佳值分别为14.0 mol/s、8.0 mol/s和805℃,耦合系统的碳排放较传统天燃气制氢工艺降低38%;MSR和DRM的甲烷进料配比可用于产品结构调整,在甲醇与H2的市场价格比大于3.0时,提高DRM反应甲烷补充量可提高经济效益。The hydrogen production from natural gas for emission reduction and methanol cogeneration system based on methane and CO_(2) dry reforming(DRM)was established.DRM converted the exhaust gas from the hydrogen production process of natural gas and further produced methanol,so as to reduce carbon emissions and realize resource utilization of the cogeneration system.Based on the reaction equilibrium and the empirical model of methanol synthesis,the Aspen Plus simulation model and the mathematical model of efficient analysis and optimization of the cogeneration system were established,and the key parameters were optimized.The simulation results show that the optimal temperature range for DRM is 805-825℃.When the methane steam reforming(MSR)temperature is 850℃,the optimal values of supplemented methane,supplemented steam,and DRM temperature are 14.0 mol/s,8.0 mol/s,and 805℃,respectively.The carbon emission of the cogeneration system is reduced by 38% than that of the traditional hydrogen production process of natural gas.The methane feed ratio of MSR and DRM can be used to adjust product structure.When the unit price ratio of methanol to hydrogen exceeds 3.0,higher economic benefits can be obtained by increasing the methane supplement to the DRM.

关 键 词：制氢 碳减排 CO_(2)重整 耦合 优化 

分 类 号：TQ021.8[化学工程]