三聚氰胺
复合数
海绵
材料科学
化学工程
气体分离
复合材料
化学
膜
地质学
生物化学
工程类
古生物学
作者
Joeri Denayer,Dila Sürmeli,Tom Van Assche,Tiriana Segato,Marie-Paule Delplancke,Gino V. Baron,Joeri Denayer
标识
DOI:10.1016/j.micromeso.2022.112146
摘要
Shape engineering porous solids such as metal-organic frameworks (MOFs) into hierarchical structured adsorbents allows significant process intensification. Here we propose a facile approach to obtain a mouldable structured adsorbent with high loading of porous solids by employing a commercially available low-cost melamine sponge. As a case study, Mg-MOF-74 was synthesized in an aqueous media at room temperature and coated successfully over the melamine sponge, without any pre-treatment/additive, to yield a melamine sponge-based Mg-MOF-74 composite (Mg-MOF-74@MS). Even after multiple coating steps, the composite displayed remarkable compressibility, thus providing additional degrees of freedom in designing packed bed systems over other rigid adsorbent forms and structures. The dynamic gas separation capability of the prepared Mg-MOF-74@MS composite was demonstrated via breakthrough experiments with mixtures of 20% CO 2 and 80% CH 4 at 1 bar and 298 K. Owing to the spatial structure of melamine sponge, the composite retained the adsorption properties of Mg-MOF-74 for CO 2 capture i.e., high dynamic capacity (5.07 mmol/g), high selectivity (>100), facile regeneration and performed better than binderless Mg-MOF-74 pellets in terms of mass transfer, unused bed length (LUB) and pressure drop (large permeability). Overall, these findings open an interesting field of research with melamine sponge-based MOF structured adsorbent as a potential candidate for gas-phase adsorption-based separation applications. • An additive free route to obtain compressible structured adsorbent is presented. • The Mg-MOF-74@MS composite showed high MOF loading and thermomechanical stability. • Mg-MOF-74 adsorption properties were retained in the Mg-MOF-74@MS composite. • It showed higher specific productivity in contrast to traditional shaped adsorbent.
科研通智能强力驱动
Strongly Powered by AbleSci AI