Increased volumetric hydrogen uptake of MOF-5 by powder densification

被引:135
作者
Purewal, J. J. [1 ,2 ]
Liu, D. [1 ,2 ]
Yang, J. [1 ]
Sudik, A. [1 ]
Siegel, D. J. [2 ]
Maurer, S. [3 ]
Mueller, U. [3 ]
机构
[1] Ford Motor Co, Res & Adv Engn, Dearborn, MI 48121 USA
[2] Univ Michigan, Dept Mech Engn, GG Brown Lab 2250, Ann Arbor, MI 48109 USA
[3] BASF SE, D-67056 Ludwigshafen, Germany
关键词
Hydrogen storage; Metal-organic frameworks; Adsorbents; Thermal conductivity; Materials processing; METAL-ORGANIC FRAMEWORKS; ADSORPTION;
D O I
10.1016/j.ijhydene.2011.03.002
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The metal-organic framework MOF-5 has attracted significant attention due to its ability to store large quantities of H-2 by mass, up to 10 wt% absolute at 70 bar and 77 K. On the other hand, since MOF-5 is typically obtained as a bulk powder, it exhibits a low volumetric density and poor thermal conductivity-both of which are undesirable characteristics for a hydrogen storage material. Here we explore the extent to which powder densification can overcome these deficiencies, as well as characterize the impact of densification on crystallinity, pore volume, surface area, and crush strength. MOF-5 powder was processed into cylindrical tablets with densities up to 1.6 g/cm(3) by mechanical compaction. We find that optimal hydrogen storage properties are achieved for rho similar to 0.5 g/cm(3), yielding a 350% increase in volumetric H-2 density with only a modest 15% reduction in gravimetric H-2 excess in comparison to the powder. Higher densities result in larger reductions in gravimetric excess. Total pore volume and surface area decrease commensurately with the gravimetric capacity, and are linked to an incipient amorphization transformation. Nevertheless, a large fraction of MOF-5 crystallinity remains intact in densities up to 0.75 g/cm(3), as confirmed from powder XRD. Predictably, the radial crush strength of the pellets is enhanced by densification, increasing by a factor of 4.3 between a density of 0.4 g/cm(3) and 0.6 g/cm(3). Thermal conductivity increases slightly with tablet density, but remains below the single crystal value. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:2723 / 2727
页数:5
相关论文
共 13 条
[1]  
HESSE M, 2009, Patent No. 7524444
[2]   Amorphization of metal-organic framework MOF-5 at unusually low applied pressure [J].
Hu, Yun Hang ;
Zhang, Lei .
PHYSICAL REVIEW B, 2010, 81 (17)
[3]   Thermal conductivity of a metal-organic framework (MOF-5): Part II. Measurement [J].
Huang, B. L. ;
Ni, Z. ;
Millward, A. ;
McGaughey, A. J. H. ;
Uher, C. ;
Kaviany, M. ;
Yaghi, O. .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2007, 50 (3-4) :405-411
[4]   Impact of preparation and handling on the hydrogen storage properties of Zn4O(1,4-benzenedicarboxylate)3 (MOF-5) [J].
Kaye, Steven S. ;
Dailly, Anne ;
Yaghi, Omar M. ;
Long, Jeffrey R. .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (46) :14176-+
[5]   Design and synthesis of an exceptionally stable and highly porous metal-organic framework [J].
Li, H ;
Eddaoudi, M ;
O'Keeffe, M ;
Yaghi, OM .
NATURE, 1999, 402 (6759) :276-279
[6]   Metal-organic frameworks -: prospective industrial applications [J].
Mueller, U ;
Schubert, M ;
Teich, F ;
Puetter, H ;
Schierle-Arndt, K ;
Pastré, J .
JOURNAL OF MATERIALS CHEMISTRY, 2006, 16 (07) :626-636
[7]   Hydrogen adsorption in metal-organic frameworks:: Cu-MOFs and Zn-MOFs compared [J].
Panella, B ;
Hirscher, M ;
Pütter, H ;
Müller, U .
ADVANCED FUNCTIONAL MATERIALS, 2006, 16 (04) :520-524
[8]   Gas adsorption process in activated carbon over a wide temperature range above the critical point. Part 1: modified Dubinin-Astakhov model [J].
Richard, M. -A. ;
Benard, P. ;
Chahine, R. .
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, 2009, 15 (01) :43-51
[9]   Hydrogen sorption in functionalized metal-organic frameworks [J].
Rowsell, JLC ;
Millward, AR ;
Park, KS ;
Yaghi, OM .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (18) :5666-5667
[10]  
Sudik A, 2011, IN PRESS