TY - JOUR
T1 - Cryo-adsorptive hydrogen storage on activated carbon. I
T2 - Thermodynamic analysis of adsorption vessels and comparison with liquid and compressed gas hydrogen storage
AU - Paggiaro, R.
AU - Bénard, P.
AU - Polifke, W.
N1 - Funding Information:
We are very grateful to W. Schütz and F. Michl from FutureCarbon GmbH (Bayreuth, Germany) for fruit joint project. We gratefully acknowledge the financial support provided by the Bayrisches Ministerium für Wirtschaft, Ministère de l’énergie et des resources of Québec, the Loschge-Studienstiftung, the Auto 21 network of Centres of Excellence and GM-Opel Deutschland.
PY - 2010/1
Y1 - 2010/1
N2 - This paper presents a thermodynamic analysis of cryo-adsorption vessels for hydrogen storage. The analysis is carried out with an unsteady lumped model and gives a global assessment of the behavior of the storage system during operation (discharge), dormancy and filling. The adsorbent used is superactivated carbon AX-21™. Cryogenic hydrogen storage, either by compression or adsorption, takes advantage of the effect of temperature on the storage density. In order to store 4.1 kg H2 in 100 L, a pressure of 750 bar at 298 K is necessary, but only 150 bar at 77 K. The pressure is further reduced to 60 bar if the container is filled with pellets of activated carbon [7]. However, adsorption vessels are submitted to intrinsic thermal effects which considerably influence their dynamic behavior and due to which thermal management is required for smooth operation. In this analysis, among energy balances for filling and discharge processes, the influence of the intrinsic thermal effects during vessel operation is presented. Hydrogen losses during normal operation as well as during long periods of inactivity are also considered. The results are compared to those obtained in low-pressure and high-pressure insulated LH2 and CH2 tanks.
AB - This paper presents a thermodynamic analysis of cryo-adsorption vessels for hydrogen storage. The analysis is carried out with an unsteady lumped model and gives a global assessment of the behavior of the storage system during operation (discharge), dormancy and filling. The adsorbent used is superactivated carbon AX-21™. Cryogenic hydrogen storage, either by compression or adsorption, takes advantage of the effect of temperature on the storage density. In order to store 4.1 kg H2 in 100 L, a pressure of 750 bar at 298 K is necessary, but only 150 bar at 77 K. The pressure is further reduced to 60 bar if the container is filled with pellets of activated carbon [7]. However, adsorption vessels are submitted to intrinsic thermal effects which considerably influence their dynamic behavior and due to which thermal management is required for smooth operation. In this analysis, among energy balances for filling and discharge processes, the influence of the intrinsic thermal effects during vessel operation is presented. Hydrogen losses during normal operation as well as during long periods of inactivity are also considered. The results are compared to those obtained in low-pressure and high-pressure insulated LH2 and CH2 tanks.
KW - Activated carbon
KW - Adsorption heat
KW - Adsorption thermodynamics
KW - Cryogenic adsorption
KW - Hydrogen
KW - Storage
UR - http://www.scopus.com/inward/record.url?scp=73749083784&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2009.10.108
DO - 10.1016/j.ijhydene.2009.10.108
M3 - Article
AN - SCOPUS:73749083784
SN - 0360-3199
VL - 35
SP - 638
EP - 647
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 2
ER -
