Advances of adsorption materials for hydrogen purification
Hydrogen,as an important energy component in the future,has diverse sources.Industrial hydrogen production and by-product hydrogen processes often come with various impurities,such as H2O,CO2,CO,N2,hydrocarbons,sulfides,etc.Impurities have a significant impact on the practical application of hydrogen gas.Therefore,purifying industrial crude hydrogen and by-product hydrogen is the key step in meeting various qualified hydrogen requirements.Adsorption separation is currently one of the most commonly used industrial hydrogen purification technologies,where the performance of adsorption materials directly affects separation efficiency and process operating costs.Developing high-performance and low-cost adsorption materials is the key research direction for the application of adsorption separation technology in hydrogen purification.This article briefly described common hydrogen purification technologies and adsorption separation mechanisms with a focus on summarizing the adsorption and removal behavior of CH4,CO2,and CO impurities in hydrogen by activated carbon,zeolite molecular sieves and metal-organic framework materials(MOFs).The research status of optimizing the performance of adsorption materials was discussed,and the advantages and disadvantages of the above adsorption materials in industrial applications were summarized.It was believed that research on hydrogen purification adsorption materials should focus on adsorption mechanisms and calculations.
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