| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Materials for Energy Conversion and Storage VI
|
| Presentation Title |
Minimizing Cr-evaporation from Balance of Plant Components by Utilizing Cost-Effective Alumina-Forming Austensic Steels |
| Author(s) |
Zhipeng Zeng, Lingfeng Zhou, Yukinori Yamamoto, Michael P. Brady, Xingbo Liu |
| On-Site Speaker (Planned) |
Xingbo Liu |
| Abstract Scope |
Chromium (Cr) poisoning of the cathode is one of the major degradation mechanisms encountered during long-term operation of SOFC systems. Two major sources of Cr include the metallic interconnects in the stack and balance-of-plant parts such as heat exchangers and recuperators from which Cr evaporates.
We have been developing and testing AFAs to replace 310S for applications around 750°C and the Ni-based Alloy 625 for applications around 900°C to minimize Cr evaporation from BOP components. This project continues the development of a new strategy for the in-situ formation of a Cr retention layer on the surface of AFAs to protect the cathode against damage caused by Cr-poisoning. The advantages of these proprietary AFAs include improved protection against Cr-poisoning at reduced cost and the ability to get full Al- containing scale coverage even on the most challenging BOP parts such as small-diameter tubes in heat exchangers. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |