【摘 要】
：
Hydrogen isotope separation is a challenging task due to their similar properties.Herein,based on the chemical affinity quantum sieve (CAQS) effect,the D2/H2 separation performance of M2(m-dobdc)(M =Co,Ni,Mg,Mn;m-dobdc4-=4,6-dioxido-1,3-benzenedicarboxyla
【机 构】
：
State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter
论文部分内容阅读
Hydrogen isotope separation is a challenging task due to their similar properties.Herein,based on the chemical affinity quantum sieve (CAQS) effect,the D2/H2 separation performance of M2(m-dobdc)(M =Co,Ni,Mg,Mn;m-dobdc4-=4,6-dioxido-1,3-benzenedicarboxylate),a series of honeycomb-shaped MOFs with high stability and abundant open metal sites,are studied by gases sorption and breakthrough experiments,in which two critical factors,gas uptake and adsorption enthalpy,are taken into consideration.Among these MOFs,Co2(m-dobdc) exhibits the longest D2 retention time of 180 min/g (H2/D2/Ne:1/1/98) at 77 K because of its second-highest adsorption enthalpy (10.7 kJ/mol for H2 and 11.8 kJ/mol for D2) and the best sorption capacity (5.22 mmol/g for H2 and 5.49mmol/g for D2) under low pressure of 1 kPa and 77K),which make it a promising material for industrial hydrogen isotope separation.Moreover,the results indicate that H2 and D2 capacities under low pressure (about 1 kPa)dominate the final D2/H2 separation property of MOFs.
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