SYSTEMS MODELING OF AMMONIA BORANE BEAD REACTOR FOR OFF-BOARD REGENERABLE HYDROGEN STORAGE IN PEM FUEL CELL APPLICATIONS

Conference · Tue Jun 01 04:00:00 EDT 2010

OSTI ID:982308

Brooks, Kriston P; Devarakonda, Maruthi N; Rassat, Scot D; King, Dale A; Herling, Darrell R

Out of the materials available for chemical hydrogen storage in PEM fuel cell applications, ammonia borane (AB, NH3BH3) has a high hydrogen storage capacity (upto 19.6% by weight for the release of three hydrogen molecules). Therefore, AB was chosen in our chemical hydride simulation studies. A model for the AB bead reactor system was developed to study the system performance and determine the energy, mass and volume requirements for off-board regenerable hydrogen storage. The system includes hot and cold augers, ballast tank and reactor, product tank, H2 burner and a radiator. One dimensional models based on conservation of mass, species and energy were used to predict important state variables such as reactant and product concentrations, temperatures of various components, flow rates, along with pressure in the reactor system. Control signals to various components are governed by a control system which is modeled as an independent subsystem. Various subsystem components in the models were coded as C language S-functions and implemented in Matlab/Simulink environment. Preliminary system simulation results for a start-up case and for a transient drive cycle indicate accurate trends in the reactor system dynamics.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 982308
• Report Number(s): PNNL-SA-71490; EB4202000
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
30 DIRECT ENERGY CONVERSION
ALKYL BENZENESULFONATES
AMMONIA
Ammonia Borane
Systems Modeling
Chemical Hydride
Hydrogen Storage
Matlab
Bead reactor
BALLASTS
BORANES
BURNERS
CAPACITY
CONTROL
CONTROL SYSTEMS
DYNAMICS
ENERGY
ENGINEERING
ENVIRONMENT
FLOW RATE
FUEL CELLS
HYDRIDES
HYDROGEN
HYDROGEN STORAGE
MOLECULES
REACTORS
SIGNALS
START-UP
TANKS
TRANSIENTS