| Title |
Modification of the Amount of CH4 Supplied for the Efficient CH4 Reduction of SnO2 |
| Authors |
(Taeyang Han); (Youhan Sohn); (Hyunwoo Ha); (Mi Yoo); (Sangyeol Kim); (Sang-ro Lee); (Hyun You Kim); (Jun Hyun Han) |
| DOI |
https://doi.org/10.3365/KJMM.2018.56.5.384 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
SnO2; CH4; reduction; syngas; thermodynamic simulation; recovery rate |
| Abstract |
The methane reduction (MR) of SnO< SUB >2< /SUB > has been proposed as a highly efficient method for recovering Sn from SnO< SUB >2< /SUB > containing industrial wastes. The MR of SnO< SUB >2< /SUB > also produces a mixture of H2 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/SnO< SUB >2< /SUB > molar ratios of 1, 3, or 5) on the recovery of Sn from SnO< SUB >2< /SUB > and the H2/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 H2/CO in the product gas, increased as a function of the supplied-CH4/SnO< SUB >2< /SUB > ratio. We found that the recovery of Sn increased as a function of supplied-CH4 (95.5% at CH4/SnO< SUB >2< /SUB >=5) however, the purity of Sn was consistent for all studied samples (~99.90%). Our results confirm that 3N quality highpurity Sn can be easily recovered from SnO< SUB >2< /SUB > containing industrial wastes by direct solid-gas reduction. |