High Ammonia Uptake of a Metal-Organic Framework Adsorbent in a Wide Pressure Range
- High Ammonia Uptake of a Metal-Organic Framework Adsorbent in a Wide Pressure Range
- 이정훈; 김대원; 강동원; 강민정; 채종혁; 채윤석; 최두산; 윤홍렬; 홍창섭
- Issue Date
- Angewandte Chemie international edition
- VOL 59, NO 50-22536
- Although numerous porous adsorbents have been investigated for NH3 capture applications, these materials often exhibit insufficient NH3 uptake, low NH3 affinity at the ppm level, and poor chemical stability against wet NH3 conditions. The NH3 capture properties of M2(dobpdc) complexes (M=Mg2+, Mn2+, Co2+, Ni2+, and Zn2+; dobpdc4？=4,4dioxidobiphenyl3,3dicarboxylate) that contain open metal sites is presented. The NH3 uptake of Mg2(dobpdc) at 298？K was 23.9？mmol？g？1 at 1？bar and 8.25？mmol？g？1 at 570？ppm, which are record high capacities at both pressures among existing porous adsorbents. The structural stability of Mg2(dobpdc) upon exposure to wet NH3 was superior to that of the other M2(dobpdc) and the frameworks tested. Overall, these results demonstrate that Mg2(dobpdc) is a recyclable compound that exhibits significant NH3 affinity and capacity, making it a promising candidate for realworld NH3capture applications.
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