scholarly journals Carbon Deposition Behavior from CH4 Fuel on Ni-ScSZ Cermet Anode in High Temperature SOFC

2005 ◽  
Vol 2005-07 (1) ◽  
pp. 1317-1320 ◽  
Author(s):  
K. Ke
Keyword(s):  
High Temperature ◽  
Carbon Deposition ◽  
Deposition Behavior

Effect of oxide on carbon deposition behavior of CH4 fuel on Ni/ScSZ cermet anode in high temperature SOFCs

2006 ◽  
Vol 177 (5-6) ◽  
pp. 541-547 ◽  
Author(s):  
K KE ◽  
A GUNJI ◽  
H MORI ◽  
S TSUCHIDA ◽  
H TAKAHASHI ◽  
...  
Keyword(s):  
High Temperature ◽  
Carbon Deposition ◽  
Deposition Behavior

Active Chemistry Control for Coolant Helium Applying High-Temperature Gas-Cooled Reactors

2008 ◽  
Author(s):  
Nariaki Sakaba ◽  
Shimpei Hamamoto ◽  
Yoichi Takeda
Keyword(s):  
Heat Transfer ◽  
High Temperature ◽  
Heat Exchanger ◽  
Chemical Composition ◽  
Structural Integrity ◽  
Carbon Deposition ◽  
Control Technology ◽  
Equilibrium Study ◽  
Intermediate Heat Exchanger ◽  
High Temperature Gas

Lifetime extension of high-temperature equipment such as the intermediate heat exchanger of high-temperature gas-cooled reactors (HTGRs) is important from the economical point of view. Since the replacing cost will cause the increasing of the running cost, it is important to reduce replacing times of the high-cost primary equipment during assumed reactor lifetime. In the past, helium chemistry has been controlled by the passive chemistry control technology in which chemical impurity in the coolant helium is removed as low concentration as possible, as does Japan’s HTTR. Although the lifetime of high-temperature equipment almost depends upon the chemistry conditions in the coolant helium, it is necessary to establish an active chemistry control technology to maintain adequate chemical conditions. In this study, carbon deposition which could occur at the surface of the heat transfer tubes of the intermediate heat exchanger and decarburization of the high-temperature material of Hastelloy XR used at the heat transfer tubes were evaluated by referring the actual chemistry data obtained by the HTTR. The chemical equilibrium study contributed to clarify the algorism of the chemistry behaviours to be controlled. The created algorism is planned to be added to the instrumentation system of the helium purification systems. In addition, the chemical composition to be maintained during the reactor operation was proposed by evaluating not only core graphite oxidation but also carbon deposition and decarburization. It was identified when the chemical composition could not keep adequately, injection of 10 ppm carbon monoxide could effectively control the chemical composition to the designated stable area where the high-temperature materials could keep their structural integrity beyond the assumed duration. The proposed active chemistry control technology is expected to contribute economically to the purification systems of the future very high-temperature reactors.

Correlation between Crystalline Phase of ScSZ and Carbon Deposition Behavior Over Ni-ScSZ Anode for Internal Reforming of Solid Oxide Fuel Cells

2019 ◽  
Vol 25 (2) ◽  
pp. 2091-2098
Author(s):  
Toshiaki Matsui ◽  
Tatsuya Iida ◽  
Ryuji Kikuchi ◽  
Mitsunobu Kawano ◽  
Toru Inagaki ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Crystalline Phase ◽  
Carbon Deposition ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Deposition Behavior ◽  
Internal Reforming

Carbon deposition behavior of a Co–Ni aerogel catalyst in CH 4 oxy-CO 2 reforming using various types of reactors

2014 ◽  
Vol 39 (28) ◽  
pp. 15474-15481 ◽  
Author(s):  
Lin Chen ◽  
Zhandong Hao ◽  
Tianzu Yang ◽  
Weifeng Liu ◽  
Duchao Zhang
Keyword(s):  
Carbon Deposition ◽  
Deposition Behavior
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