Adsorbents development for hydrogen cleanup from ammonia decomposition in a catalytic membrane reactor
نویسندگان
چکیده
Copper-exchanged faujasite (Cu-FAU) zeolites have been investigated in this work as promising adsorbent materials to further purify hydrogen produced via ammonia decomposition a membrane reactor. Samples prepared ion-exchange procedure using commercially available NaY, HY and 13X their performance was evaluated compared the one of parent zeolites. The introduction copper species framework demonstrated enhance NH3 useful saturation capacities However, Cu-FAU synthesized presence copper(II)nitrate trihydrate calcined air showed significant deactivation after first adsorption/desorption cycle. characterization revealed that phenomenon can be attributed dealumination which is on other hand prevented when occurs ammonium hydroxide inert environment adopted during calcination. most material found one-time ion-exchanged form zeolite 13X, showing capacity stable at 3.07 ± 0.39 mmol NH3/gsorbent over ten cycles performed with He/NH3 mixture containing 3000 ppm regeneration He. As similar has achieved under operating conditions emulating outlet stream reactor for decomposition, regarded effectively NH3-derived H2
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ژورنال
عنوان ژورنال: Chemical Engineering Journal
سال: 2023
ISSN: ['1873-3212', '1385-8947']
DOI: https://doi.org/10.1016/j.cej.2022.140762