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마이크로파 연속반응기를 이용한 MIL-100(Fe) 합성 및 CO/CO<sub>2</sub> 흡착 분리 응용
( Le Van Nhieu ),공창인,김정훈,권혁택,김진수 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Metal-organic frameworks (MOFs), organic-inorganic hybrid crystalline materials with extreme structural diversity, are typically synthesized in closed batch systems which is not favorable for large-scale MOF synthesis. In this study, we tried a scalable MOF synthesis route based on a flow tubular reactor equipped with microwave volumetric heating. The system enabled continuous crystallization of MIL-100(Fe) with a high space time yield at relatively mild conditions as compared to conventional batch systems. The synthesized MIL-100(Fe) was used as a support to prepare Cu(I)-modified MIL-100(Fe) adsorbents. The Cu(I)@MIL-100(Fe) showed preferred CO adsorption over CO<sub>2</sub>.
The Ky Vo,Van Nhieu Le,Van Cuong Nguyen,Mugeun Song,Daekeun Kim,Kye Sang Yoo,Bum Jun Park,Jinsoo Kim 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.86 No.-
Mixed-ligand metal–organic frameworks (MIXMOFs) containing two or more organic linkers that exhibitfunctionalities can show improved selective gas adsorption and separation properties with respect tothose of the conventional MOFs. In this study, the mixed-ligand UiO–66(Zr) framework was rapidlyprepared by employing a microwave-assisted continuous-flow method, which can be easily scaled up forefficient mass production. A microfluidic syringe pump system was used to introduce the precursorsolutions of zirconium metal salt and ligand mixture (terephthalic acid and 2-amino terephthalic acid)into a polytetrafluoroethylene tubular reactor kept under microwave irradiation. MIXMOFs wereobtained within 10 min, a much shorter time than the reaction time required by the conventional heatingmethod. The prepared samples were characterized by N2 porosimetry,field-emission scanning electronmicroscopy, Fourier transform infrared spectrometry, thermogravimetric, and powder X-ray diffractionanalyses to elucidate the effects of the ligand ratios. Furthermore, the toluene adsorption–desorptiontests were conducted using the synthesized mixed-ligand UiO–66(Zr) adsorbents at differenttemperatures.
Dieu-Phuong Phan,The Ky Vo,Van Nhieu Le,Jinsoo Kim,Eun Yeol Lee 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.83 No.-
Catalytic hydrodeoxygenation (HDO) is a process for removing of oxygen from oxygen-containingcompounds using a catalyst. In this study, spherical bimetallic NiMo/Al2O3–TiO2 catalysts with differentNi/Mo ratios were successfully synthesized by combining sol–gel method and continuousflow spraypyrolysis process. The prepared catalysts were characterized by N2 adsorption–desorption, TEM, SEM,XRD, XPS, H2-TPR and NH3-TPD analyses. The catalysts were then applied for HDO of guaiacol as a modelcompound using afixed-bed reactor. The effects of bimetallic compositions and reduction temperatureson HDO conversion of guaiacol as well as their product distributions were systematically investigated. The obtained results showed that bimetallic NiMo/Al2O3–TiO2 exhibited higher HDO conversion thanmonometallic catalysts (Ni/Al2O3–TiO2 or Mo/Al2O3–TiO2). The highest HDO conversion of 98% with 100%hydrocarbon selectivity (85% cyclohexane, 13% methylcyclohexane and 2% toluene) was obtained over(10 wt% Ni and 20 wt% Mo)/Al2O3–TiO2 catalyst. In addition, the catalyst maintained a good catalyticstability for 24 h of reaction time, suggesting that spray pyrolysis derived NiMo/Al2O3–TiO2 catalyst canbe a promising catalyst for HDO performance.