M4-NUWC Overview Fontaine.pdf
M4-NUWC Overview Fontaine.pdf M4-NUWC Overview Fontaine.pdf
Microplasma Reforming of Acetylene for SOFC Aboard UUVs Student: E. Lennon, PI: R. Besser, Navy Mentor: A. A. Burke elennon@stevens.edu, rbesser@stevens.edu Non-Thermal Microplasma S&T OBJECTIVES Examples: • Microplasma chips fabricated by Besser’s group running with inert gases (nitrogen & neon) in batch mode. APPROAC •H • • Characterize VI behaviors of microplasmas to determine device efficiencies under various chip geometries & input settings. Design next generation flow-thru microplasma chips & fabricate at Cornell Nanotechnology Facility (CNF). Assess hydrogen generation from C2H2 microplasma chips in a closed-loop carbide fuel processing system via measurement of conversion, yield, selectivity, & process efficiencies (all potentially improved by high electron density in microplasma). • • Determine if microplasma reforming of acetylene (C2H2) is a viable fuel processing option for H2 delivery to UUV SOFC. Determine if viable, under what conditions microplasma reforming of acetylene (C2H2) performs best. Compare microplasma fuel reforming for UUVs to existing reforming technologies. Accomplishments Jun’08 – May‘09 • Completed H2 O2 decomposition project & submitted manuscript to Journal of Power Sources. • Completed microplasma fuel processing lit review. • Reviewed VI data of inert gas microplasmas & analyzed characteristics for batch chips. • Integrating mass spec into current experimental Upcoming setup. Work Jun’09 – May’10 • Complete microplasma flow-thru chip design . • Fabricate next generation microplasma flow-thru chips at CNF. • Run experiments of acetylene reforming with microplasma chips to quantify hydrogen
APPROACH • • • • • Fuel H 2 O + O 2 from decomposed H 2 O 2 Fuel Cell Performance using Decomposed Hydrogen Peroxide as the Oxidant John R. Izzo Jr., Wilson K. S. Chiu, University of Connecticut, wchiu@engr.uconn.edu Louis G. Carreiro, A. Alan Burke, Naval Undersea Warfare Center, Newport RI SOFC anode electrolyte cathode Develop model to predict SOFC performance for various oxidant stream compositions. Validate model via cathode polarization tests on button cells. Characterize H2O2 to identify impurities. Determine extent of LSM cathode degradation using SEM, EDS, XRD and polarization data. Couple fuel cell with H2O2 micro-chemical reactor and optimize cathode for the oxidant feed stream. % Change in � at x* =1 Voltage (V) Performance (modeling) -2 -1.8 -1.6 -1.4 -1.2 -1 -0.8 -0.6 -0.4 -0.2 0 50 um 400 um 100 um 300 um 200 um 300 200 um um 400 100 um um 50 um 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Oxidant Molar Water Content Testing (experiments) 1.2 1 0.8 0.6 0.4 0.2 0 0 0.1 0.2 0.3 0.4 0.5 0.6 Current Density (A/ cm2) 850C 800C 750C 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Power Density (W/ cm2) ACCOMPLISHMENTS AND PLANS • • • S&T OBJECTIVES • • • Understand behavior of air-independent fuel cells for UUV propulsion applications. Study the effect of a decomposed H2 on fuel cell performance and durability. Cathode model coupling gas and charge transport developed and validated. LSM cathode exposed to H2O, N2 at 750 ˚C and characterized with SEM, EDS and XRD. Baseline polarization experiment performed. • Perform additional polarization experiments while varying H2O content in oxidant stream. • Refine competitive sorption mechanism with O2 and H2O to describe O2 reduction kinetics in model. O 2 stream Develop Solid Oxide Fuel Cell (SOFC) system model and experimental setup for validation with button cell testing.
- Page 1 and 2: Advanced Unmanned Undersea Vehicle
- Page 3 and 4: • Joint / Coalition Battlespace M
- Page 5 and 6: Science and Technology for: Shock A
- Page 7 and 8: • • Propulsion and Energy Thrus
- Page 9 and 10: Advanced Air-Independent Energy Sol
- Page 11 and 12: • • • Fuel Flexibility - - -
- Page 13 and 14: SOFC Stack Test Stand Versa Power S
- Page 15 and 16: Fuel Processing (Reformers) Catalyt
- Page 17 and 18: • • 30-Cell NUWC SOFC Lab Syste
- Page 19 and 20: • • • • In house Laboratory
- Page 21 and 22: Carbide / Hydride Fuel System CaC 2
- Page 23 and 24: • • • Summary of SOFC Effort
- Page 25 and 26: • • • NaBH 4 Objective: - / H
- Page 27 and 28: Oxidation of BH 4 - Anode BH 4 - Re
- Page 29 and 30: • • • Direct Borohydride Syst
- Page 31 and 32: energy density (Wh/kg) 340 320 300
- Page 33 and 34: single cell potential (V) 1.80 1.60
- Page 35 and 36: Li - Lithium-Seawater Battery Devel
- Page 37: A outlet Electrolyte Flow Reference
- Page 41 and 42: ONR Sponsors: • • Dr. Michele A
APPROACH<br />
•<br />
•<br />
•<br />
•<br />
•<br />
Fuel<br />
H 2 O + O 2 from<br />
decomposed<br />
H 2 O 2<br />
Fuel Cell Performance using Decomposed Hydrogen<br />
Peroxide as the Oxidant<br />
John R. Izzo Jr., Wilson K. S. Chiu, University of Connecticut,<br />
wchiu@engr.uconn.edu<br />
Louis G. Carreiro, A. Alan Burke, Naval Undersea Warfare Center, Newport RI<br />
SOFC<br />
anode<br />
electrolyte<br />
cathode<br />
Develop model to predict SOFC performance<br />
for various oxidant stream compositions.<br />
Validate model via cathode polarization tests on<br />
button cells.<br />
Characterize H2O2 to identify impurities.<br />
Determine extent of LSM cathode degradation<br />
using SEM, EDS, XRD and polarization data.<br />
Couple fuel cell with H2O2 micro-chemical<br />
reactor and optimize cathode for the oxidant<br />
feed stream.<br />
% Change in � at x* =1<br />
Voltage (V)<br />
Performance (modeling)<br />
-2<br />
-1.8<br />
-1.6<br />
-1.4<br />
-1.2<br />
-1<br />
-0.8<br />
-0.6<br />
-0.4<br />
-0.2<br />
0<br />
50 um<br />
400 um<br />
100 um<br />
300 um<br />
200 um<br />
300 200 um um<br />
400 100 um um<br />
50 um<br />
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9<br />
Oxidant Molar Water Content<br />
Testing (experiments)<br />
1.2<br />
1<br />
0.8<br />
0.6<br />
0.4<br />
0.2<br />
0<br />
0 0.1 0.2 0.3 0.4 0.5 0.6<br />
Current Density (A/ cm2)<br />
850C<br />
800C<br />
750C<br />
0.35<br />
0.3<br />
0.25<br />
0.2<br />
0.15<br />
0.1<br />
0.05<br />
0<br />
Power Density (W/ cm2)<br />
ACCOMPLISHMENTS AND PLANS<br />
•<br />
•<br />
•<br />
S&T OBJECTIVES<br />
•<br />
•<br />
•<br />
Understand behavior of air-independent fuel<br />
cells for UUV propulsion applications.<br />
Study the effect of a decomposed H2 on fuel cell performance and durability.<br />
Cathode model coupling gas and charge transport<br />
developed and validated.<br />
LSM cathode exposed to H2O, N2 at 750 ˚C and<br />
characterized with SEM, EDS and XRD.<br />
Baseline polarization experiment performed.<br />
• Perform additional polarization experiments while<br />
varying H2O content in oxidant stream.<br />
• Refine competitive sorption mechanism with O2 and H2O to describe O2 reduction kinetics in model.<br />
O 2<br />
stream<br />
Develop Solid Oxide Fuel Cell (SOFC) system<br />
model and experimental setup for validation with<br />
button cell testing.
Change language