direct ammonia sofc - nh3 fuel association · pdf filedirect ammonia sofc nigel sammes h.f....
Post on 06-Mar-2018
235 Views
Preview:
TRANSCRIPT
Direct Ammonia SOFC
Nigel Sammes H.F. Coors Distinguished Professor in Ceramic Engineering Department of Metallurgical & Materials Engineering Colorado School of Mines
Why SOFC and Why Ammonia? • High efficiency
• Efficient at part load • Fast response • Use of many fuels (NH3)
SOFC/SOEC Basic Concept
Ammonia SOFC/SOEC – Potentially Reversible
SOEC or Hydrammine
Why Small and Micro-Tubular SOFC? The small-scale tubular solid oxide
fuel cells (SOFC), have many advantages over larger tubular and planar designs, including: Excellent thermal shock properties
giving rapid start-up ability, High mechanical integrity Easy and Cheap to Fabricate Easy design for stacking and
manifolding
high efficiency on energy conversion and Selective reactions
Fuel Cells
Chemical Syntheses
H2 Station
Ceramic reactor
APU for Vehicles
Cube Cell
Environment Purifying
SOEC/SOFC Applications
NH3
Overview of SOFC/SOEC Program
Micro-tube cells are integrated in a porous cathode cube.
Cell Cube
• micro-tubular designed cell high thermal shock proof high productivity
• intermediate temperature operation (650oC) quick start-up (in a few minutes)
• modularized design
high cubic power density
Modular
Concept
anode current-collector
electrolyte layer
cathode layer
cathode current-collector
anode support tube
Cell Fabrication Process The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to
50% Ni 50% 8YSZ
The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file
Polymer Binder
The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer,
Water
Mixing
Vacuuming
Extrusion
Tube Cutting
Pre - firing
The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to delete the image and then insert it again.Tube Completed
(Anode)
Dip Coating
Drying
Sintering
The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to delete the image and then insert it again.Anode and Electrolyte Completed
Brush Painting
Cathode Firing
The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to delete the image and then insert it again.Single Cell Completed
The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to
Anode Powder
The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file
Polymer Binder
The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer,
Water
Mixing
Vacuuming
Extrusion
Tube Cutting
Pre - firing
The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to delete the image and then insert it again.Tube Completed
(Anode)
Electrolyte Coating
Drying
Sintering
The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to delete the image and then insert it again.Anode and Electrolyte Completed
Brush Painting
Cathode Firing
The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to delete the image and then insert it again.Single Cell Completed
Powder Preparation and Mixing
Example of our Extrusion Capability
Support : Metal oxide-ceramic composite (200µm in thickness)
Electrolyte : Perovskite protonic ceramic (10-20µm in thickness)
Electrode : Metal oxide-ceramic composite (40µm in thickness)
Cell Preparation
0.8-1.8 mmΦ support tube
Electrolyte Application
Co-fired at 1450°C
Application of electrode
Sintered at 1000°C for 1 h.
0.8mm diameter anode tube
0.8mm diameter support tube with electrolyte
Fabrication of Micro-tubular Protonic Electrolyte on Anode Support
Details of the Perovskite Tube Microstructure
Protonic Perovskite (Sintered Material)
Test Set up for Ammonia in a PCFC and Production in a PCEC
NH3
PCEC
Results from PCFC Testing on Ammonia at 700oC
IV Curves at 700oC
Power Curves at 700oC
top related