Characterization of adsorbent composite blocks for methane storage

Abstract Adsorbent composite blocks for natural gas adsorption have been produced by mixing PX-21 and expanded natural graphite (ENG), followed by consolidation in a mould. These composite blocks of 10–30% weight ratio of expanded natural graphite and 430–480 kg m−3 apparent density have shown good methane adsorption capacities and good heat and mass transfer properties. Volumetric methane adsorption capacity (V/V) of adsorbent composite blocks produced is in the range of 110–125 V/V. Permeability increases with weight ratio of ENG, and thermal conductivity, in the range of 2–10 W m−1K−1, is much higher than activated carbon packed bed. These good transfer properties of the adsorbent composite blocks will enhance performances of on-board natural gas vehicles in terms of delivered methane volume under realistic dynamic conditions.

[1]  Characterization of Maxsorb Activated Carbons and Their Evaluation for Gas Storage , 1997 .

[2]  J. MacDonald,et al.  Carbon absorbents for natural gas storage , 1998 .

[3]  K. Loughlin,et al.  Adsorption equilibria and rate parameters for nitrogen and methane on Maxsorb activated carbon , 1996 .

[4]  J. Gmehling,et al.  Model and experimental data research of natural gas storage for vehicular usage , 1997 .

[5]  A. P. Terzyk,et al.  Energetics of methane adsorption on microporous activated carbons , 1995 .

[6]  J. Wegrzyn,et al.  Adsorbent storage of natural gas , 1996 .

[7]  S. Gauthier,et al.  Charge/Discharge Characteristics Of High-capacity Methane Adsorption Storage Systems , 1990, Proceedings of the 25th Intersociety Energy Conversion Engineering Conference.

[8]  M. Jaroniec,et al.  Thermodynamics of High-Pressure Adsorption of Argon, Nitrogen, and Methane on Microporous Adsorbents , 1998 .

[9]  J. A. Schwarz,et al.  Energetic and structural heterogeneity of activated carbons determined using dubinin isotherms and an adsorption potential in model micropores , 1992 .

[10]  Alírio E. Rodrigues,et al.  Dynamics of natural gas adsorption storage systems employing activated carbon , 1997 .

[11]  Giovanni Restuccia,et al.  Composites of activated carbon for refrigeration adsorption machines , 1995 .

[12]  Douglas M. Ruthven,et al.  Principles of Adsorption and Adsorption Processes , 1984 .

[13]  T. Otowa,et al.  Production and adsorption characteristics of MAXSORB: High-surface-area active carbon , 1993 .

[14]  Y. Ogino,et al.  Physical adsorption of gases at high pressure: V. An Extension of a Generalized Adsorption Equation to Systems with Polar Adsorbents , 1981 .

[15]  D. Cazorla-Amorós,et al.  Methane storage in activated carbon fibres , 1997 .

[16]  S. Mauran,et al.  Heat and mass transfer in consolidated reacting beds for thermochemical systems , 1993 .

[17]  Y. Ogino,et al.  Physical adsorption of gases at high pressure. IV. An improvement of the Dubinin—Astakhov adsorption equation , 1976 .

[18]  Douglas M. Smith,et al.  Characterization of Porous Solids , 1994 .

[19]  F. Stoeckli,et al.  Pore size distributions of active carbons assessed by different techniques , 2000 .

[20]  R. Rogers,et al.  Storage of Fuel in Hydrates for Natural Gas Vehicles (NGVs) , 1996 .

[21]  J. MacDonald,et al.  Adsorbents for methane storage made by phosphoric acid activation of peach pits , 1996 .

[23]  K. Loughlin,et al.  Rate and equilibrium sorption parameters for nitrogen and methane on carbon molecular sieve , 1993 .

[24]  N. Quirke,et al.  Methane adsorption on microporous carbons—A comparison of experiment, theory, and simulation , 1992 .

[25]  Michio Inagaki,et al.  Exfoliated graphite from various intercalation compounds , 1991 .

[26]  Orhan Talu,et al.  Behavior and performance of adsorptive natural gas storage cylinders during discharge , 1996 .