Influence of mixed molten carbonate composition on hydrogen formation by steam gasification |
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Authors: | Tohru Kamo Beili Wu Yuriko Egami Hajime Yasuda Hideki Nakagome |
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Institution: | (1) Department of Chemical Engineering, Catalysis and Chemical Reaction Engineering Laboratories, University of Saskatchewan, 57 Campus Drive, Saskatoon, Canada, S7N 5A9 SK; |
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Abstract: | Steam gasification in the presence of carbonate compounds is an effective method to recover useful materials from electronic
waste streams by converting plastics into gaseous products that can be used for energy production and avoiding the expensive
manual disassembly process. We investigated steam gasification of activated carbon in the presence of various mixtures of
lithium carbonate, sodium carbonate, and potassium carbonate. The activated carbon was almost completely converted into hydrogen
and carbon dioxide at 700°C under 0.1 MPa pressure in the presence of carbonate mixtures. Carbon dioxide was also derived
from partial decomposition of lithium carbonate. Steam gasification was accelerated in the presence of various carbonate mixtures
and at increasing steam partial pressures. These experimental results show that fluidity of carbonates, the potassium content
of the carbonate, and the steam partial pressure are important factors in accelerating steam gasification. |
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