Solid-state synthesis ensures a high loading and well-dispersed growth of a large collection of metal–organic framework (MOF) nanostructures within a series of commercially available mesoporous silica. This approach provides a general, highly efficient, scalable, environmentally friendly, and inexpensive strategy for shaping MOFs into a fluidized form, thereby allowing their application in fluidized-bed reactors for diverse applications, such as CO₂ capture from post-combustion flue gas. A collection of polyamine-impregnated MOF/SiO₂ hybrid sorbents were evaluated for CO₂ capture under simulated flue gas conditions in a packed-bed reactor. Hybrid sorbents containing a moderate loading of (Zn)ZIF-8 are the most promising sorbents in terms of CO₂ adsorption capacity and long-term stability (up to 250 cycles in the presence of contaminants: SO₂, NO_x and H₂S) and were successfully prepared at the kilogram scale. These hybrid sorbents demonstrated excellent fluidizability and performance under the relevant process conditions in a visual fluidized-bed reactor. Moreover, a biochemically inspired strategy for covalently linking polyamines to MOF/SiO₂ through strong phosphine bonds has been first introduced in this work as a powerful and highly versatile post-synthesis modification for MOF chemistry, thus providing a novel alternative towards more stable CO₂ solid sorbents.

中文翻译：

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飞行 MOF：含多胺的流化 MOF/SiO2 杂化材料，用于从燃烧后烟气中捕获 CO2†

固态合成确保了一系列市售介孔二氧化硅中大量金属有机框架（MOF）纳米结构的高负载和良好分散的生长。这种方法提供了一种通用、高效、可扩展、环保且廉价的策略，用于将MOF成型为流化形式，从而允许它们在流化床反应器中用于多种应用，例如从燃烧后烟气中捕获CO 2 _。在填充床反应器中的模拟烟道气条件下评估了一系列聚胺浸渍的MOF/SiO _{2混合吸附剂的CO 2捕获能力。}就 CO ₂吸附能力和长期稳定性（在存在污染物：SO ₂、NO _x和 H ₂ S的情况下最多 250 个循环）而言，含有中等负载量 (Zn)ZIF-8 的混合吸附剂是最有前途的吸附剂）并在公斤级成功制备。这些混合吸附剂在可视化流化床反应器的相关工艺条件下表现出优异的流化性和性能。此外，这项工作首次引入了一种受生物化学启发的策略，通过强膦键将多胺与 MOF/SiO _{2共价连接，作为 MOF 化学的强大且高度通用的合成后修饰，从而为更稳定的 CO 2}提供了一种新颖的替代方案。固体吸附剂。