Evaluation of steady-state characteristics for solid oxide carbon fuel cell short-stacks

Usman Mushtaq, Muhammad Taqi Mehran, Sun-Kyoung Kim, Tak-Hyoung Lim, Syed Asad Ali Naqvi, Jong-Won Lee, Seung-Bok Lee, Seok-Joo Park and Rak-Hyun Song

Applied Energy, 2017, vol. 187, issue C, 886-898

Abstract: Solid oxide based carbon fuel cells (SO-CFCs) offer clean and efficient utilization of carbon based fuels for energy conversion. In this work, we have realized and operated 100 and 200W-class solid oxide carbon fuel cell (SO-CFC) short stacks to investigate the fuel supply, electrochemical performance, continuous operation, long-term stability, and scale-up characteristics for SO-CFC based power generation systems. Different configurations for 100 and 200W class short stacks were employed for integrated Boudouard gasification and carbon fuel supply at the stack level. For the 100W class SO-CFC short stack, maximum stack power of 80.4, 93.5, and 111.5W was achieved at 700, 750, and 800°C, respectively, while the 200W class SO-CFC short stack produced maximum power of 224.4W at 750°C when operated on carbon fuel. Both SO-CFC short stacks were operated continuously at galvanostatic conditions to study the fuel supply conditions and long-term degradation behavior of the tubular cells in the short stacks. A postmortem analysis of the SO-CFC anode was also performed by SEM and XRD to elucidate the reasons for stack performance degradation during relatively longer operation with carbon fuels. Through a detailed analysis of the dry gasification in the integrated gasifier, the electrochemical performance of the SO-CFC stacks, and the post operation diagnosis of the cells, this study provides details on the important challenges in scaling-up SO-CFC technology from a single-cell to a several hundred watt power generation system.

Keywords: SO-CFC short-stack; Dry gasification; Reverse Boudouard reaction; Electrochemical performance; Carbon (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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DOI: 10.1016/j.apenergy.2016.11.015

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