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We study the mechanism of alkane reduction of SnO 2  for efficient low-temperature recovery of Sn from SnO 2 . Based on thermodynamic simulation results, we comparatively analyze the reduction behavior and the efficiency of SnO 2  reduction by H 2  and alkanes (C  x  H y=2 x+2  , 0 ≤  x  ≤ 4). We found that alkanes ( n ·C  x  H  y  ) with the higher  nx  generally complete the reduction of SnO 2  (T 100 ) at the lower temperature. Moreover, the T 100  of the SnO 2  reduction by alkanes ( n ·C  x  H  y  ) was decreased from the T 100  of pure hydrogen with the same amount of hydrogen atoms ( n ·H  y  ). We found that the concentration of a gas phase product mixture, the amount of the produced solid carbon, and the T 100  complementary vary as a function of the  nx  and  ny , the total amount of carbon and hydrogen atoms in the reducing gas phase molecules. Our results demonstrate a viability of the low temperature reduction method of SnO 2  by alkanes for efficient recovery of Sn from SnO 2 , which can be applied for Sn recovery from Sn containing industrial wastes or Sn ores with economic value added that is held by the co-produced H 2 .

Efficient Sn Recovery from SnO2 by Alkane (CxHy=2x+2, 0 ≤ x ≤ 4) Reduction