Modification of the Amount of CH4 Supplied for the Efficient CH4 Reduction of SnO2

• Published in: Korean Journal of Metals and Materials Vol. 56; no. 5; pp. 384 - 391
• Main Authors: Han, Taeyang, Sohn, Youhan, Ha, Hyunwoo, Yoo, Mi, Kim, Sangyeol, Lee, Sang-ro, Kim, Hyun You, Han, Jun Hyun
• Format: Journal Article
• Language: English
• Published: 대한금속·재료학회 01.05.2018
• Subjects: 재료공학
• ISSN: 1738-8228; 2288-8241
• DOI: 10.3365/KJMM.2018.56.5.384

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 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/SnO2 molar ratios of 1, 3, or 5) on the recovery of Sn from SnO2 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/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 (~99.90%). Our results confirm that 3N quality highpurity Sn can be easily recovered from SnO2 containing industrial wastes by direct solid-gas reduction. KCI Citation Count: 2