Effect of sulfur contaminants on MCFC performance

Rexed, Ivan; Lagergren, Carina

doi:10.1016/j.ijhydene.2014.03.068

Cited by 23 publications

(6 citation statements)

References 22 publications

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“…Literature studies of MCFCs vary from assessing new materials for increased overall cell performances [8][9][10][11][12] and resistance to pollutants 13,14 to the analysis of the effects of the operating conditions. [15][16][17] Recently, composite of Solid Oxide Fuel Cells and MCFCs electrolyte materials have also gained attention due to their high multi-ionic conductivity, although their mechanism is not well understood yet. [18][19][20] Related research has been also devoted to the development of process models to aid theoretical studies or designs of fuel cells and plants.…”

Section: Symbols Latinmentioning

confidence: 99%

New, Dual-Anion Mechanism for Molten Carbonate Fuel Cells Working as Carbon Capture Devices

Audasso

Bosio

Bove

et al. 2020

J. Electrochem. Soc.

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Molten Carbonate Fuel Cells (MCFCs) are commercially employed in MW-scale power production, and recently are being developed also for carbon capture. Past experiments showed that MCFC performance with wet cathode feeding was higher than with dry cathode feeds at otherwise similar conditions. This was ascribed to a mechanism that predicted the water increasing the apparent CO 2 diffusion rate. However, recent tests performed at low CO 2 cathode feed concentrations, as in carbon capture service, showed the emergence of a different water effect. Namely, there seems to be an electrochemical reaction path attributable to water, involving hydroxide ions that runs parallel with the main path involving CO 2 . This results in lower CO 2 transfer from the cathode to the anode than what can be calculated from the electrical current. For the first time, here, a theoretical analysis will be presented to introduce a kinetic expression for MCFCs working under this dual-ion regime. Focus will be given to the expression of CO 2 and water polarization to assess the ratio between the current due to the two anions. Simulation and experimental results will be discussed providing a reliable and effective basis for the performance optimization of the MCFCs both in power and in carbon capture applications.

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Section: Symbols Latinmentioning

confidence: 99%

New, Dual-Anion Mechanism for Molten Carbonate Fuel Cells Working as Carbon Capture Devices

Audasso

Bosio

Bove

et al. 2020

J. Electrochem. Soc.

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“…Successively, prior to entry to the MCFC, the flue gas stream undergoes a pre-treatment process. In fact, different works have shown that many pollutants, specifically sulfur compounds, can greatly harm the cell units [18][19][20][21]. The units implemented within this design were selective catalytic reduction and wet limestone scrubbing for flue gas pre-treatment for Nitrogen Oxides (NOx) [22,23] and Sulphur Dioxide (SO2) respectively [24][25][26].…”

Section: Examination Of the Mcfc Integrated Plant Environmentmentioning

confidence: 99%

A feasibility assessment of a retrofit Molten Carbonate Fuel Cell coal-fired plant for flue gas CO2 segregation

Cooper

Bove

Audasso

et al. 2021

International Journal of Hydrogen Energy

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“…In CCS, SO2 is the most harmful pollutant agent present in the flue gas, which causes performance decay and structural degradation of the MCFC. It is known that SO2 content can significantly affect the cell performance as discussed in previous works [14][15][16]. Specifically, in [14] long term tests allowed to investigate the evolution of the sulphur poisoning mechanism under fixed operating conditions and concentrations of the pollutant agent.…”

Section: Introductionmentioning

confidence: 96%

“…It is known that SO2 content can significantly affect the cell performance as discussed in previous works [14][15][16]. Specifically, in [14] long term tests allowed to investigate the evolution of the sulphur poisoning mechanism under fixed operating conditions and concentrations of the pollutant agent. To provide a complete framework, necessary to perform quantitative analysis of this phenomenon, investigation must be carried out to characterize the effect of the main operating parameters on SO2 poisoning.…”

Section: Introductionmentioning

confidence: 96%

Experimental investigation of SO2 poisoning in a Molten Carbonate Fuel Cell operating in CCS configuration

Pietra

Discepoli

Bosio

et al. 2016

International Journal of Hydrogen Energy

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One of the most interesting innovations in the CCS (Carbon Capture and Storage) field is the use of MCFCs as carbon dioxide concentrators, feeding their cathode side (or air side) with the exhaust gas of a traditional power plant. The feasibility of this kind of application depends on the resistance of the MCFC to air-side contaminants, with particular attention to SO2. The aim of this work is to investigate the effects of poisoning when sulphur dioxide is added to the cathodic stream in various concentrations and in different operating conditions. This study was carried out operating single cells (80 cm 2) with a cathodic feeding composition simulating typical flue gas conditions, i.e. N2, H2O, O2 and CO2 in 73:9:12:6 mole ratio as reference mixture. On the anodic side a base composition was chosen with H2, CO2 and H2O in 64:16:20 mole ratio. Starting from these reference mixtures, the effect of single species on cell poisoning was experimentally investigated considering, as main parameters chosen for the sensitivity analysis, SO2 (0-24ppm) and CO2 (4-12%) content in the cathodic feeding mixture, H2 (40-64%) content in the anodic stream as well as the operating temperature (620-680°C). Results showed that degradation caused by SO2 poisoning is strongly affected by the operating conditions. Data gathered during this experimental campaign will be used in a future work to model the poisoning mechanisms through the definition of MCFC electrochemical kinetics which take into account the SO2 effects.

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Effect of sulfur contaminants on MCFC performance

Cited by 23 publications

References 22 publications

New, Dual-Anion Mechanism for Molten Carbonate Fuel Cells Working as Carbon Capture Devices

New, Dual-Anion Mechanism for Molten Carbonate Fuel Cells Working as Carbon Capture Devices

A feasibility assessment of a retrofit Molten Carbonate Fuel Cell coal-fired plant for flue gas CO2 segregation

Experimental investigation of SO2 poisoning in a Molten Carbonate Fuel Cell operating in CCS configuration

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