Methane storage in flexible metal–organic frameworks with intrinsic thermal management
Top Cited Papers
- 26 October 2015
- journal article
- letter
- Published by Springer Science and Business Media LLC in Nature
- Vol. 527 (7578), 357-361
- https://doi.org/10.1038/nature15732
Abstract
As a cleaner, cheaper, and more globally evenly distributed fuel, natural gas has considerable environmental, economic, and political advantages over petroleum as a source of energy for the transportation sector1,2. Despite these benefits, its low volumetric energy density at ambient temperature and pressure presents substantial challenges, particularly for light-duty vehicles with little space available for on-board fuel storage3. Adsorbed natural gas systems have the potential to store high densities of methane (CH4, the principal component of natural gas) within a porous material at ambient temperature and moderate pressures4. Although activated carbons, zeolites, and metal–organic frameworks have been investigated extensively for CH4 storage5,6,7,8, there are practical challenges involved in designing systems with high capacities and in managing the thermal fluctuations associated with adsorbing and desorbing gas from the adsorbent. Here, we use a reversible phase transition in a metal–organic framework to maximize the deliverable capacity of CH4 while also providing internal heat management during adsorption and desorption. In particular, the flexible compounds Fe(bdp) and Co(bdp) (bdp2− = 1,4-benzenedipyrazolate) are shown to undergo a structural phase transition in response to specific CH4 pressures, resulting in adsorption and desorption isotherms that feature a sharp ‘step’. Such behaviour enables greater storage capacities than have been achieved for classical adsorbents9, while also reducing the amount of heat released during adsorption and the impact of cooling during desorption. The pressure and energy associated with the phase transition can be tuned either chemically or by application of mechanical pressure.Keywords
This publication has 29 references indexed in Scilit:
- The materials genome in action: identifying the performance limits for methane storageEnergy & Environmental Science, 2015
- Stepping on the gasScience, 2014
- Methane storage in metal–organic frameworksChemical Society Reviews, 2014
- Evaluating metal–organic frameworks for natural gas storageChemical Science, 2013
- Methane Storage in Metal–Organic Frameworks: Current Records, Surprise Findings, and ChallengesJournal of the American Chemical Society, 2013
- Methane storage in advanced porous materialsChemical Society Reviews, 2012
- Soft porous crystalsNature Chemistry, 2009
- An empirical analysis on the adoption of alternative fuel vehicles: The case of natural gas vehiclesEnergy Policy, 2007
- Clathrate-Formation Mediated Adsorption of Methane on Cu-Complex CrystalsThe Journal of Physical Chemistry B, 2005
- Adsorbent storage of natural gasApplied Energy, 1996