A brief analysis of technologies for hydrogen separation and purification from hydrogen mixed natural gas
The characteristics of pressure swing adsorption,membrane separation and electrochemical hy-drogen separation technology were mainly investigated,and solutions specially for hydrogen mixed natural gas were proposed:rapid pressure swing adsorption technology with smaller land occupation and lower cost,which is suitable for handling small-scale gas,can be mainly studied in the short and medium term of hydrogen energy industry;carbon molecular sieve membrane technology with the characteristics of low cost and high purity hydrogen,which will probably play a significant role in the long term,can be layout re-searched;the pretreatment of hydrogen mixed natural gas should focus on the removal of light hydrocarbon and sulfur,the impact on the stable operation of subsequent processes and the magnitude of energy con-sumption should be considered separately;the non hydrogen gas reinjection pipeline network after separa-tion and purification should focus on the pressure of the gas source and avoid non hydrogen gas compres-sion to reduce the cost of hydrogen separation and purification.
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