开发多种类分离膜与压缩冷凝耦合的梯度回收工艺,实现H2和CO2等组分高价值利用。考察压力、产品浓度和不同氢膜单元对工艺的影响。通过Aspen HYSYS对10000 Nm3/h处理量的工艺优化模拟得出：采用单级氢膜单元和一级二段氢膜单元,尾气进膜压力2700 kPa和H2产品浓度60%时,工艺经济性最佳,分别实现H2回收率81%和90%、CO2回收率58%和60%、燃气热值16.7 MJ/Nm3和18.2 MJ/Nm3、投资回收期26.1 个月和24.4 个月。采用二级氢膜单元投资最少,最佳投资回收期16.5 个月时,氢气产品纯度为52%,低于制氢吸附装置设计要求。
Abstract
In this regard, a gradient recovery process coupled with various types of separation membranes and compression condensation is developed to achieve high-value utilization of components such as H2 and CO2. The effects of pressure, product concentration and different hydrogen membrane units on the process are investigated. Through the process optimization simulation of Aspen HYSYS for a throughput of 10000 Nm3/h, it is concluded that when the single-stage hydrogen membrane unit and the single-stage two-step hydrogen membrane unit are used, the process economy is best when the exhaust gas inlet pressure is 2700 kPa and the H2 product concentration is 60%. The H2 recovery rate is 81% and 90%, the CO2 recovery rate is 58% and 60%, the gas calorific value is 16.7 MJ/Nm3 and 18.2 MJ/Nm3, and the investment recovery period is 26.1 months and 24.4 months, respectively. When the second-stage hydrogen membrane unit is used, the investment is least, and when the best payback period is 16.5 months, the purity of the hydrogen product is 52%, which is lower than the design requirements of the hydrogen production adsorption device.
关键词
天然气 /
制氢 /
膜 /
碳捕集 /
工艺设计 /
氢回收
Key words
natural gas /
hydrogen production /
membrane /
carbon capture /
process design /
hydrogen recovery
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基金
国家自然科学基金青年基金（21706023）; 辽宁省“兴辽英才”计划青年拔尖人才（XLYC2007040）
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