“…The behavior of pyrite during the preparation, combustion, and coking of coal has gotten particular attention (Atesok et al, 1999;Jassim et al, 2011;Querol et al, 1994;Shen et al, 2012;Wang et al, 2013;Yani and Zhang, 2010;Zhao et al, 2015). On the basis of spectroscopic analysis, some Chinese researchers thought that pyrite in coal contains some carbon (Shao et al, 1992(Shao et al, , 1994Wang, 1996;Wu and Zhu, 2010;Xu et al, 2007).…”