粉体工学会誌
Online ISSN : 1883-7239
Print ISSN : 0386-6157
論文
マイクロリアクタの混合特性評価と多孔性錯体微粒子合成への適用
渡邉 哲大﨑 修司福田 晃子花房 竜也髙田 健斗田中 秀樹牧 泰輔前 一廣宮原 稔
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2015 年 52 巻 7 号 p. 382-389

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Here we quantitatively evaluated the mixing performance of a tailor-made microreactor with central-collision type through the iodide/iodate chemical test reaction, and applied the microreactor to the synthesis of zeolitic imidazolate framework-8 (ZIF-8), which is a subclass of porous coordination polymers (PCPs) or metal organic frameworks (MOFs). The chemical test reaction demonstrated excellent mixing performance of the microreactor with a characteristic mixing time shorter than 1 millisecond, which is approximately 100 times faster than those of a batch reactor and a millimeter-sized Y-shaped mixer. Taking advantage of the rapid and uniform mixing, the microreactor successfully produced ZIF-8 particles with high reproducibility by simply mixing aqueous solutions of zinc nitrate and 2-methylimidazole. The synthesis at room temperature resulted in ZIF-8 particles with chamfered cube shape, while a lower temperature of 5℃ produced raspberry-type spherical particles. We confirmed that prepared ZIF-8 particles have BET surface area of ~1500 m2/g and exhibit the gate adsorption behavior caused by the structural transition of the ZIF-8 framework.

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