CAJ | 학술논문

主要研究了MOF-74(Ni)材料对CO/N2/CO2的吸附分离性能。应用水热法合成制备MOF-74(Ni)，分别采用全自动表面积吸附仪、P-XRD、扫描电子显微镜对材料的孔隙结构和晶体形貌进行了表征，应用静态吸附法测定了CO、N2和CO2在MOF-74(Ni)上的吸附等温线，应用DSLF方程模拟了3种气体MOF-74(Ni)上的吸附等温线，依据IAST理论模型计算了MOF-74(Ni)对CO/N2二元混合物和CO/CO2二元混合物的吸附选择性。研究结果表明：在0.1 MPa和常温条件下，MOF-74(Ni)材料对CO吸附容量高达6.15 mmol·g?1，而相同条件下N2的吸附量只有0.86 mmol·g?1。MOF-74(Ni)在低压下（0～40 kPa）对CO的吸附量明显高于其对CO2的吸附量。应用IAST模型估算MOF-74(Ni)对二元混合物吸附选择性的结果表明：MOF-74(Ni)对CO/N2混合物的吸附选择性在1000以上；MOF-74(Ni)对 CO/CO2的吸附选择性在4～9范围，在所研究的二元气体混合物吸附体系中，MOF-74(Ni)都能优先吸附CO。
주요연구료MOF-74(Ni)재료대CO/N2/CO2적흡부분리성능。응용수열법합성제비MOF-74(Ni)，분별채용전자동표면적흡부의、P-XRD、소묘전자현미경대재료적공극결구화정체형모진행료표정，응용정태흡부법측정료CO、N2화CO2재MOF-74(Ni)상적흡부등온선，응용DSLF방정모의료3충기체MOF-74(Ni)상적흡부등온선，의거IAST이론모형계산료MOF-74(Ni)대CO/N2이원혼합물화CO/CO2이원혼합물적흡부선택성。연구결과표명：재0.1 MPa화상온조건하，MOF-74(Ni)재료대CO흡부용량고체6.15 mmol·g?1，이상동조건하N2적흡부량지유0.86 mmol·g?1。MOF-74(Ni)재저압하（0～40 kPa）대CO적흡부량명현고우기대CO2적흡부량。응용IAST모형고산MOF-74(Ni)대이원혼합물흡부선택성적결과표명：MOF-74(Ni)대CO/N2혼합물적흡부선택성재1000이상；MOF-74(Ni)대 CO/CO2적흡부선택성재4～9범위，재소연구적이원기체혼합물흡부체계중，MOF-74(Ni)도능우선흡부CO。
This work investigates the adsorption performance of adsorbent MOF-74(Ni) for CO/N2 and CO2/CO2 binary gas mixtures. Adsorbent MOF-74(Ni) with high density of coordinatively unsaturated sites was synthesized by a hydrothermal method, and characterized with N2 adsorption, P-XRD, and SEM. The adsorption isotherms of CO, N2 and CO2 on MOF-74(Ni) were measured, and the selectivities for CO/N2 and CO/CO2 were calculated based on ideal adsorbed solution theory (IAST). Results showed that adsorbent MOF-74(Ni) achieved superior CO adsorption capacity of 6.15 mmol·g?1 at 298 K and 0.1 MPa, and as low as 0.86 mmol·g?1 for N2. In low pressure range of 0—40 kPa, MOF-74(Ni) showed significantly higher uptake for CO than that for CO2. Moreover, IAST-predicted CO/N2 selectivity of MOF-74(Ni) is above 1000, and its CO/CO2 selectivity is in the range of 4—9. It suggests that MOF-74(Ni) is more favorable for CO adsorption than N2and CO2 adsorption.