Abstract:

Hydrogen energy, as an important carrier for achieving sustainable development, is of great significance for building a clean, low-carbon, and efficient energy system and achieving the “dual carbon” goals. This article designs a complete process for hydrogen separation, which is simulated and analyzed using software Aspen Plus. By proposing a coupled hydrogen separation system consisting of pressure swing adsorption (PSA), rectisol, and membrane separation, and using software such as Aspen Plus for simulation and analysis, the advantages of various separation technologies were combined. The integration of multiple separation processes has broken the purity bottleneck of single membrane separation, resulting in a product hydrogen concentration of up to 99.67%. In addition, it achieves the enrichment of CO₂ and the recycling of CH₄, reducing the loss of hydrogen production raw materials. The entire system has better separation performance compared to existing single technology, providing new insights and application potential for other gas separation problems.

Key words: hydrogen, separation, pressure swing adsorption, membranes, rectisol, computer simulation

摘要：

氢能作为实现可持续发展的重要载体，对构建清洁低碳高效的能源体系、实现“双碳”目标具有重要意义。通过提出变压吸附（PSA）-低温甲醇洗-膜分离的耦合氢气分离系统，并借助Aspen Plus等软件进行模拟和分析，实现了多种分离技术的优势结合。多项分离工艺集成有效利用了PSA尾气中的氢气，提高了氢气回收率；打破了单一膜分离提纯氢气的纯度瓶颈，获得产品氢气浓度高达99.67%；实现了CO₂的富集和CH₄的循环回收，减少了制氢原料的损失。整个系统相比于现存的装置运行分离效果和经济性更好，为其他氢气提纯问题提供了新思路和一定的实用价值。

关键词: 氢, 分离, 变压吸附, 膜, 低温甲醇洗, 计算机模拟