Modification Of The Amount Of Ch4 Supplied For The Efficient Ch4 Reduction Of Sno2
Korean Journal of Metals and Materials(2018)
摘要
The methane reduction (MR) of SnO2 has been proposed as a highly efficient method for recovering Sn from SnO2 containing industrial wastes. The MR of SnO2 also produces a mixture of H-2 and CO, which can be further utilized as a syngas for the production of various fuels through the Fisher-Tropsch process. To optimize the process parameters, we studied the effect of the amount of supplied CH4 (CH4/SnO2 molar ratios of 1, 3, or 5) on the recovery of Sn from SnO2 and the H-2/CO ratio in the produced gas. Through a combination of thermodynamic simulation and experimental confirmation, we found that the recovery rate of Sn, and the molar ratio of H-2/CO in the product gas, increased as a function of the supplied-CH4/SnO2 ratio. We found that the recovery of Sn increased as a function of supplied-CH4 (95.5% at CH4/SnO2=5) however, the purity of Sn was consistent for all studied samples (similar to 99.90%). Our results confirm that 3N quality high purity Sn can be easily recovered from SnO2 containing industrial wastes by direct solid-gas reduction.
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关键词
SnO2, CH4, reduction, syngas, thermodynamic simulation, recovery rate
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