An Optimised Compaction Process for Zr-Fumarate (MOF-801)
An Optimised Compaction Process for Zr-Fumarate (MOF-801)
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DOI：
10.3390/inorganics7090110
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发表时间：
2019
期刊：
影响因子：
2.9
通讯作者：
M. Taddei;M. McPherson;Abel Gougsa;J. Lam;J. Sewell;E. Andreoli
中科院分区：
文献类型：
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作者：
M. Taddei;M. McPherson;Abel Gougsa;J. Lam;J. Sewell;E. Andreoli
我们报道了一种系统的方法，旨在确定最佳条件的压缩的MOF-801，一个小孔锆基金属有机框架（MOF）含有富马酸作为连接体，可以很容易地在水介质中合成。通过在一定范围的压力下压缩纯形式或与粘合剂（蔗糖、聚乙烯醇、聚乙烯醇缩丁醛）干混的粉末不同时间来制备MOF的粒料。通过简单的跌落试验和摇动试验测试粒料的机械稳定性和耐久性，发现添加5%的聚乙烯醇缩丁醛足以产生在破裂时不释放显著量的粉末的高弹性粒料。对MOF的结晶度、织构性质和CO2吸附性能进行了连续评估，观察到在146 MPa下压缩15 s的颗粒中原始性质的变化最小。较高压力下的压实对性能的影响更大，从机械角度来看没有明显的益处，而压缩时间没有相关影响。的循环吸附行为进行了测试，表明该粒料保留多达90%的CO2工作能力，同时显示不受影响的吸附动力学，和74%的H2O工作能力。
We reported a systematic approach aimed at identifying the optimal conditions for compaction of MOF-801, a small-pore zirconium-based metal–organic framework (MOF) containing fumaric acid as the linker, that can be easily synthesised in aqueous medium. Pellets of the MOF were prepared by compressing the powder either in neat form or dry-mixed with binders (sucrose, polyvinylalcohol, polyvinylbutyral) under a range of pressures and for different times. The mechanical stability and durability of the pellets was tested by simple drop tests and shake tests, finding that addition of 5% of polyvinylbutyral was enough to produce highly resilient pellets that did not release significant amounts of powder upon cracking. The crystallinity, textural properties and CO2 adsorption performance of the MOF were successively assessed, observing the least change of the original properties in pellets compressed at 146 MPa for 15 s. Compaction at higher pressures impacted the performance more heavily, with no evident benefit from the mechanical point of view, whereas compression time did not have a relevant effect. The cyclic adsorption behaviour was tested, showing that the pellets retained as much as 90% of the CO2 working capacity, while displaying unaffected sorption kinetics, and 74% of the H2O working capacity.