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Browsing School of Arts and Sciences by Author "Romanos, Jimmy"

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Browsing School of Arts and Sciences by Author "Romanos, Jimmy"

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  • Adsorbed natural gas storage in optimized high surface area microporous carbon 
    Romanos, Jimmy; Rash, Tyler; Nordwald, Erik; Shocklee, Joshua Shawn; Wexler, Carlos; Pfeifer, Peter (American Physical Society, 2019-10-11)
    Adsorbed natural gas (ANG) is an attractive alternative technology to compressed natural gas (CNG) or liquefied natural gas (LNG) for the efficient storage of natural gas, in particular for vehicular applications. In ...
  • Anomalous characteristics of a PVDC carbon adsorbant 
    Wexler, Carlos; Beckner, Matthew; Romanos, Jimmy; Tyler, Rash; Pfeifer, Peter; Olsen, Raina (American Physical Society, 2019-10-14)
    Nanoporous carbon produced by the pyrolisis of poly(vinylidene chloride-co-vinyl chloride) shows remarkably high adsorption of molecular hydrogen despite its relatively low surface area. In particular, its room temperature ...
  • Boron-neutron capture on activated carbon for hydrogen storage 
    Romanos, Jimmy; Beckner, Matthew; Prosniewski, Matthew; Rash, Tyler; LEe, Mark; Robertson, J.David; Firlej, Lucyna; Kutcha, Bogdan; Pfeifer, Peter (2019-10-10)
    This work investigates the effects of neutron irradiation on nitrogen and hydrogen adsorption in boron-doped activated carbon. Boron-neutron capture generates an energetic lithium nucleus, helium nucleus, and gamma photons, ...
  • Complex structural contribution of the morphotropic phase boundary in Na0.5Bi0.5TiO3 - CaTiO3 system 
    Roukos, Roy; Abou Dargham, Sara; Romanos, Jimmy; Barakat, Fatima; Chaumont, Denis (2019-10-10)
    The correlation between structure and dielectric properties of lead-free (1-x)Na0.5Bi0.5TiO3 - xCaTiO3 ((1-x)NBT - xCT) polycrystalline ceramics was investigated systematically by X-ray diffraction, combined with impedance ...
  • Cycling and regeneration of adsorbed natural gas in microporous materials 
    Romanos, Jimmy; Rash, Tyler; Abou Dargham, Sara; Prosniewski, Matthew; Barakat, Fatima; Pfeifer, Peter (2019-10-10)
    Adsorbed natural gas (ANG) technology is an energy-efficient method for storing natural gas at room temperature and low pressure. The search for high-storage-performance natural gas sorbents for gaseous fuels is currently ...
  • Effect of cycling and thermal control on the storage and dynamics of a 40-L monolithic adsorbed natural gas tank 
    Prosniewski, Matthew; Rash, Tyler; Romanos, Jimmy; Gillespie, Andrew; Stalla, David; Knight, Ernest; Smith, Adam; Pfeifer, Peter (2019-10-10)
    Adsorbed natural gas systems have been proposed as a cost-effective storage alternative to compressed and liquefied natural gas. This has led many groups to search and design sorbent materials with large methane storage ...
  • The effect of KOH:C and activation temperature on hydrogen storage capacities of activated carbons 
    Rash, Tyler; Beckner, Matt; Romanos, Jimmy; Leimkuehler, Eric; Takeei, Ali; Suppes, Galen; Wexler, Carlos; Pfeifer, Peter (American Physical Society, 2019-10-14)
    The Alliance for Collaborative Research in Alternative Fuel Technologies (ALL-CRAFT has been producing high surface area activated carbons. Here we will investigate the effect of the ratio of activating agent to carbon and ...
  • Evaluating methane adsorbed film densities on activated carbon in dynamic systems 
    Prosniewski, Matthew; Gillespie, Andrew; Knight, Ernest; Rash, Tyler; Stalla, David; Romanos, Jimmy; Smith, Adam (2019-10-10)
    Dynamic methane loading and discharge experiments on a 40 L adsorbed natural gas tank containing 20.5 kg of monolithic carbon adsorbent have been combined with pore volume data from subcritical nitrogen isotherms to evaluate ...
  • Hypothetical high-surface-area carbons with exceptional hydrogen storage capacities 
    Kuchta, Bodgan; Frilej, Lucyna; Mohammadhosseini, Ali; Boulet, Pascal; Beckner, Matthew; Romanos, Jimmy; Pfeifer, Peter (2019-10-11)
    A class of high-surface-area carbon hypothetical structures has been investigated that goes beyond the traditional model of parallel graphene sheets hosting layers of physisorbed hydrogen in slit-shaped pores of variable ...
  • Industrial scale measurements of hydrogen uptake and delivery in KOH activated carbons 
    Tyler, Rash; Dave, Stalla; Beckner, Matt; Romanos, Jimmy; Suppes, G.; Tekeei, A.; Buckley, P.; Doynoy, P.; Pfeifer, Peter (American Physical Society, 2019-10-11)
    The Alliance for Collaborative Research in Alternative Fuel Technologies (ALL-CRAFT) has been producing high surface area activated carbons. Here we will investigate the hydrogen adsorption characteristics of these activated ...
  • Local pressure of supercritical adsorbed hydrogen in nanopores 
    Romanos, Jimmy; Abou Dargham, Sara; Roukos, Roy; Pfeifer, Peter (2019-10-10)
    An overview is given of the development of sorbent materials for hydrogen storage. Understanding the surface properties of the adsorbed film is crucial to optimize hydrogen storage capacities. In this work, the lattice gas ...
  • Magnetic properties of high-surface-area carbons and their effect on adsorbed hydrogen 
    Romanos, Jimmy; Beckner, Matthew; Kraus, Micheal; Burress, Jacob; Pfeifer, Peter (American Physical Society, 2019-10-14)
    We report the discovery that a large number of nanoporous carbon samples, made from corn cob and exhibiting high hydrogen storage capacities (Pfeifer et al, Mater. Res. Soc. Symp. Proc. 1041 R02-02 (2008)), show unexpected ...
  • Open carbon frameworks - a search for optimal geometry for hydrogen storage 
    Kuchta, Bogdan; Firlej, Lucyna; Ali, Mohammadhosseini; Beckner, Matthew; Romanos, Jimmy; Pfeifer, Peter (2019-10-10)
    Properties of a new class of hypothetical high-surface-area porous carbons (open carbon frameworks) have been discussed. The limits of hydrogen adsorption in these carbon porous structures have been analyzed in terms of ...
  • Properties of adsorbed supercritical methane film in nanopores 
    Romanos, Jimmy; Abou Dargham, Sara; Roukos, Roy; Pfeifer, Peter (2019-10-10)
    Adsorbed natural gas technology is an efficient technology for storing natural gas at low pressure and room temperature. This work investigates the properties of the adsorbed methane film in nanopores where methane is ...
  • Quantification of relaxor behavior in (1 − x)Na0.5Bi0.5TiO3 – xCaTiO3 lead-free ceramics system 
    Roukos, Roy; Romanos, Jimmy; Abou Dargham, Sara; Chaumont, Denis (2019-10-10)
    This work examines the relaxor behavior of lead-free ceramic (1 − x)Na0.5Bi0.5TiO3–xCaTiO3 systems. A stable rhombohedral (R3c) phase is detected at room temperature for all compositions by XRD and Raman spectroscopy. ...
  • Reversible storage of hydrogen and natural gas in nanospace-engineered activated carbons 
    Romanos, Jimmy; Beckner, Matt; Rash, Tyler; Yu, Ping; Galen, Suppes; Pfeifer, Peter (American Physical Society, 2019-10-11)
    An overview is given of the development of advanced nanoporous carbons as storage materials for natural gas (methane) and molecular hydrogen in on-board fuel tanks for next-generation clean automobiles. High specific surface ...
  • Structure–function relations for gravimetric and volumetric methane storage capacities in activated carbon 
    Romanos, Jimmy; Abou Dargham, Sara; Prosniewski, Matthew; Roukos, Roy; Barakat, Fatima; Pfeifer, Peter (2019-10-10)
    The complex structure of activated carbon can be described as a three-dimensional network of graphene layers oriented in random directions. In this work, we propose a new model of the microporous structure, taking into ...

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