METHOD FOR SEPARATION AND PURIFICATION OF HYDROGEN FROM DECOMPOSED MIXED GAS OF AMMONIA

The present invention relates to a pressure swing adsorption process, which is an adsorption separation method for purifying hydrogen from a mixed gas in which hydrogen and nitrogen, obtained by decomposing ammonia, and undecomposed ammonia, are contained. After nitrogen and ammonia are adsorbed ont...

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Bibliographic Details
Main Authors LIM, Sam Mok, CHO, Soon Haeng, KIM, In Baek, PARK, Joo Hyun
Format Patent
LanguageEnglish
French
Korean
Published 09.06.2022
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Summary:The present invention relates to a pressure swing adsorption process, which is an adsorption separation method for purifying hydrogen from a mixed gas in which hydrogen and nitrogen, obtained by decomposing ammonia, and undecomposed ammonia, are contained. After nitrogen and ammonia are adsorbed onto adsorbents, from hydrogen gas containing nitrogen and ammonia, by allowing same to pass through four or more pressure swing adsorption devices filled with the adsorbents, unadsorbed hydrogen is discharged to the upper portion of an adsorption tower to produce purified hydrogen, and hydrogen can be purified and produced from a mixed gas in which hydrogen and nitrogen, obtained by decomposing ammonia, and undecomposed ammonia, are contained, by using a pressure swing adsorption (PSA) process for removing the nitrogen and ammonia adsorbed onto the adsorbents by reducing the pressure to atmospheric pressure, and a vacuum pressure swing adsorption (VPSA) process for removing the adsorbed nitrogen and ammonia by reducing the pressure to vacuum pressure. La présente invention concerne un procédé d'adsorption modulée en pression, qui est un procédé de séparation par adsorption pour purifier l'hydrogène à partir d'un gaz mixte dans lequel sont présents de l'hydrogène et de l'azote, obtenus par décomposition de l'ammoniac, et de l'ammoniac non décomposé. Après adsorption de l'azote et de l'ammoniac sur des adsorbants, à partir d'hydrogène gazeux contenant de l'azote et de l'ammoniac, en permettant à ceux-ci de passer à travers quatre dispositifs d'adsorption modulée en pression, ou plus, chargés des adsorbants, de l'hydrogène non adsorbé est évacué vers la partie supérieure d'une tour d'adsorption pour produire de l'hydrogène purifié, et de l'hydrogène peut être purifié et produit à partir d'un gaz mixte dans lequel sont présents de l'hydrogène et de l'azote, obtenus par décomposition de l'ammoniac, et de l'ammoniac non décomposé, à l'aide d'un procédé d'adsorption modulée en pression (PSA) destiné à l'élimination de l'azote et de l'ammoniac adsorbés sur les adsorbants par réduction de la pression à la pression atmosphérique, et d'un procédé d'adsorption modulé en pression sous vide (VPSA) destiné à l'élimination de l'azote et de l'ammoniac adsorbés par réduction de la pression à la pression sous vide. 본 발명은 암모니아를 분해하여 얻은 수소와 질소, 미분해 암모니아가 포함된 혼합가스로부터 수소를 정제하는 흡착분리방법인 압력스윙 흡착법에 관한 것으로서, 질소, 암모니아가 포함된 수소가스로부터 흡착제가 충진된 4기 이상의 압력스윙 흡착장치에 통과시켜 흡착제에 질소와 암모니아를 흡착시킨 후 흡착되지 않는 수소는 흡착탑 상부로 배출하여 정제된 수소를 생산하고, 흡착제에 흡착된 질소와 암모니아는 대기압까지 감압하여 제거하는 압력스윙흡착(Pressure Swing Adsorption, PSA)법과 진공압력까지 감압하여 제거하는 진공압력스윙흡착(Vacuum Pressure Swing Adsorption, VPSA)법으로 암모니아를 분해하여 얻은 수소와 질소, 미분해 암모니아가 포함된 혼합가스로부터 수소를 정제하여 생산할 수 있는 효과가 있다.
Bibliography:Application Number: WO2021KR18220