As one of the most important energy sources, coal can be gasified to syngas in order for it be used in solid oxide fuel cell (SOFC) efficiently and cleanly. However, the big challenge of the utilization of the syngas in SOFC is the carbon formation activity in the Ni/YSZ anode. In this work, according to the fully three-dimensional models of chemical/electrochemical, heat/mass transfer and overpotential, the effects of fuel components on the performance and carbon formation of SOFC were analyzed. From the results, the increment of water steam and carbon dioxide may inhibit the carbon deposition. However, massive water steam and carbon dioxide reduces the output voltage of SOFC as well. The proper molar fraction of hydrogen in syngas also reduces the carbon formation activity. The addition of carbon monoxide may narrow down the region of carbon formation but enhance the carbon formation activity near the fuel inlet of SOFC. Moreover, the existence of methane results in the sharply carbon formation; thus, the methane should be removed as clear as possibly in syngas.

References

References
1.
Macek
,
J.
,
Novosel
,
B.
,
Marinsek
,
M.
, 2007, “
Ni–YSZ SOFC Anodes—Minimization of Carbon Deposition
,”
J. Eur. Ceram. Soc.
,
27
, pp.
487
491
.
2.
Grgicak
,
C. M.
,
Green
,
R. G.
, and
Giorgi
,
J. B.
, 2008,
SOFC Anodes for Direct Oxidation of Hydrogen and Methane Fuels Containing H2S
,”
J. Power Sources
,
179
, pp.
317
328
.
3.
Ormerod
,
R. M.
, 2003,
High Temperature Fuel Cells: Fundamentals, Design and Applications
,
S. C.
Singhal
and
K.
Kendall
, eds.,
Elsevier
,
Amsterdam
, pp.
333
361
.
4.
Xu
,
Z.-R.
,
Fu
,
X.-Z.
,
Luo
,
J.-L.
, and.
Chuang
,
K. T.
, 2010, “
Carbon Deposition on Vanadium-Based Anode Catalyst for SOFC Using Syngas as Fuel
,”
J. Electrochem. Soc.
,
157
(
11
), pp.
B1556
B1560
.
5.
Chun
,
C. M.
, and
Ramanarayanan
,
T. A.
, 2007, “
Mechanism and Control of Carbon Deposition on High Temperature Alloys
,”
J. Electrochem. Soc.
,
154
(
9
), pp.
C465
C471
.
6.
Matsui
,
T.
,
Iida
,
T.
,
Kikuchi
,
R.
,
Kawano
,
M.
,
Inagaki
,
T.
, and
Eguchi
,
K.
, 2008, “
Carbon Deposition over Ni–ScSZ Anodes Subjected to Various Heat-Treatments for Internal Reforming of Solid Oxide Fuel Cells
,”
J. Electrochem. Soc.
,
155
(
11
), pp.
B1136
B1140
.
7.
Koh
,
J.-H.
,
Yoo
,
Y.-S.
,
Park
,
J.-W.
, and
Lim
,
H. C.
, 2002, “
Carbon Deposition and Cell Performance of Ni-YSZ Anode Support SOFC with Methane Fuel
,”
Solid State Ionics
,
149
, pp.
157
166
.
8.
Finnerty
,
C. M.
,
Coe
,
N. J.
,
Cunningham
,
R. H.
, and
Ormerod
,
R. M.
, 1998, “
Carbon Formation on and Deactivation of Nickel-Based/Zirconia Anodes in Solid Oxide Fuel Cells Running on Methane
,”
Catal. Today
,
46
, pp.
137
145
.
9.
Nikooyeh
,
K.
,
Clemmer
,
R.
,
Alzate-Restrepo
,
V.
, and
Hill
,
J. M.
, 2008, “
Effect of Hydrogen on Carbon Formation on Ni/YSZ Composites Exposed to Methane
,”
Appl. Catal., A
,
347
, pp.
106
111
.
10.
Koh
,
J.-H.
,
Kang
,
B.-S.
,
Lim
,
H. C.
, and
Yoo
,
Y.-S.
, 2001, “
Thermodynamic Analysis of Carbon Deposition and Electrochemical Oxidation of Methane for SOFC Anodes. Electrochemical and Solid-State Letters
,”
4
(
2
), pp.
A12
A15
.
11.
Alzate-Restrepo
,
V.
, and
Hill
,
J. M.
, 2010, “
Carbon Deposition on Ni/YSZ Anodes Exposed to CO/H2 Feeds
,”
J. Power Sources
,
195
, pp.
1344
1351
.
12.
Miao
,
H.
,
Wang
,
W. G.
,
Li
,
T. S.
,
Chen
,
T.
,
Sun
,
S. S.
, and
Xu
,
C.
, 2010, “
Effects of Coal Syngas Major Compositions on Ni/YSZ Anode-Supported Solid Oxide Fuel Cells
,”
J. Power Sources
,
195
, pp.
2230
2235
.
13.
Wang
,
Y. Z.
,
Yoshiba
,
F.
,
Watanabe
,
T.
Wang
,
S.
, 2007, “
Numerical Analysis of Electrochemical Characteristics and Heat/Species Transport for Planar Porous-Electrode-Supported SOFC
,”
J. Power Sources
,
170
(
1
), pp.
101
110
.
14.
Hou
,
K.
, and
Hughes
,
R.
, 2001, “
The Kinetics of Methane Steam Reforming over a Ni/α-Al2O Catalyst
,”
Chem. Eng. J.
,
82
(
1–3
), pp.
311
328
.
15.
Xu
,
J.
, and
Froment
,
G. F.
, 1989, “
Methane Steam Reforming Methanation and Water Gas Shift-I. Intrinsic Kinetics
,”
AIChE J.
,
35
(
1
), pp.
88
96
.
16.
Wang
,
Y. Z.
,
Yoshiba
,
F.
,
Kawase
,
M.
,
Watanabe
,
T.
, 2009, “
Performance and Effective Kinetic Models of Methane Steam Reforming over Ni/YSZ Anode of Planar SOFC
,”
Int. J. Hydrogen Energy
,
34
(
9
), pp.
3885
3893
.
17.
Wang
,
Y. Z.
,
Hui
,
Y.
,
Yu
,
J.-G.
, and
Weng
,
S.-L.
, 2009, “
Experimental Investigation on Methane Steam Reforming over a Ni/YSZ Anode of Planar Solid Oxide Fuel Cell
,”
Proceedings of the CSEE, 2009
,
29
(
14
), pp.
104
108
(In Chinese).
18.
Yu
,
J. G.
,
Wang
,
Y. Z.
,
Xu
,
L.
,
Weng
,
S.
, 2009, “
Development and Investigation on the Study State of Solid Oxide Fuel Cell and Hybrid Power System
,”
Proceedings of the 1st International Conference on Sustainable Power Generation and Supply
, China, 6–7 April 2009.
19.
Yu
,
J. G.
,
Wang
,
Y. Z.
,
Weng
,
S. L.
,
Hui
,
Y.
, 2009, “
The Effect of Anode Porosity on the Performance of Planar Electrode Supported Solid Oxide Fuel Cell
,”
Proceedings of ASME 2009 2nd Micro/Nanoscale Heat & Mass Transfer International Conference
, China, 18–22 December 2009.
20.
Simbeck
,
D. R.
,
Korens
,
N.
, 1993,
Coal Gasification Guidebook: Status, Applications, and Technologies
,
USA
,
Electric Power Research Institute
.
You do not currently have access to this content.