The effect of impurities on the performance of bioethanol-used internal reforming molten carbonate fuel cell
- The effect of impurities on the performance of bioethanol-used internal reforming molten carbonate fuel cell
- 데비안또하리; 한종희; 윤성필; 남석우; 임태훈; 오인환; 홍성안; 이호인
- Bioethanol; MCFC; Steam reforming; Impurities; Coking
- Issue Date
- International journal of hydrogen energy
- VOL 36, NO 16, 10346-10354
- The effects of impurities in bioethanol, such as diethyl amine, acetic acid, methanol, and
propanol, on the performance of a direct internal reforming molten carbonate fuel cell
(MCFC) were investigated. A single cell with an Ni/MgO-coated anode was operated using
bioethanol containing 1% impurities. The cell voltages of the single cells increased after the
introduction of methanol and diethyl amine impurities. On the other hand, the single cell
operated with propanol and acetic acid impurities showed somewhat worse performance
than when it was operated without impurities. Activity tests were carried out to explain
this phenomenon in detail. These tests showed that methanol as an impurity is reformed
easily and increases the H2 concentration in the reformed gas thereby increasing conversion
and selectivity. Propanol, which is reformed incompletely, negatively affects the
conversion and H2 selectivity. Diethyl amine follows a basic reaction pathway and is
reformed completely without coke formation, and acetic acid, which follows an acidic
pathway, forms significant coke on the catalyst which deactivates the catalytic activity.
Mixtures of these four impurities, in varying mole ratios were tested for catalytic activity,
and it was found that of the mixtures tested, the one with a ratio 2:1:4:1 (methanol:
propanol:diethyl amine:acetic acid) showed the best catalytic activity.
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