Physical and Computational Sciences Division , Pacific Northwest National Laboratory (PNNL) , Richland , Washington 99352 , United States.
Department of Chemistry and Biochemistry , The Ohio State University , Columbus , Ohio 43210 , United States.
ACS Appl Mater Interfaces. 2018 May 2;10(17):14287-14291. doi: 10.1021/acsami.8b03848. Epub 2018 Apr 20.
Alkali-exchanged SSZ-13 adsorbents were investigated for their applicability in separating N from CO in flue gas streams using a dynamic breakthrough method. In contrast to IAST calculations based on equilibrium isotherms, K exchanged SSZ-13 was found to yield the best N productivity, comparable to Ni-MOF-74, under dynamic conditions where diffusion properties play a significant role. This was attributed to the selective, partial blockage of access to the chabazite cavities, enhancing the separation potential in a 15/85 CO/N binary gas mixture.
采用动态穿透法研究了碱交换 SSZ-13 吸附剂在烟道气中分离 N 和 CO 的应用。与基于平衡等温线的 IAST 计算相反，在扩散性能起重要作用的动态条件下，发现 K 交换 SSZ-13 产生的 N 生产率最佳，可与 Ni-MOF-74 相媲美。这归因于对菱沸石腔的选择性、部分阻塞，从而增强了在 15/85 CO/N 二元混合气体中的分离潜力。
