“…The catalysts used for coal gasification usually must have to demonstrate some benefits, such as environmental friendliness, high activities, low price for purchase/synthesis, easy availability, and recyclability (Monterroso et al, 2014;Yu, Tian, Chow, McKenzie, & Li, 2006). Currently, the catalysts that have been investigated for coal gasification for H 2 production include Na 2 CO 3 (Monterroso et al, 2014;Zhang, Zhao, et al, 2013), K 2 CO 3 Kopyscinski, Rahman, Gupta, Mims, & Hill, 2014;Li, Guo, Zhang, Jin, & Lu, 2010;Wang et al, 2005, Wang, Jiang, et al, 2009, Ca(OH) 2 or CaO (Lin, Harada, Suzuki, & Hatano, 2004;Zhang, Zhao, et al, 2013), FeCO 3 (Monterroso et al, 2014), FeCO 3 -Na 2 CO 3 composite (Monterroso et al, 2014), Na 2 CO 3 -Ca(OH) 2 composite (Zhang, Zhao, et al, 2013), Li 2 CO 3 /Na 2 CO 3 /K 2 CO 3 and Li 2 CO 3 /Na 2 CO 3 /Rb 2 CO 3 ternary eutectics (Sheth, Sastry, Yeboah, Xu, & Agarwal, 2004;Yeboah, Xu, Sheth, Godavarty, & Agarwal, 2003), Na 2 CO 3 /K 2 CO 3 binary eutectics (Sheth et al, 2004;Yeboah et al, 2003), and Raney Ni (Li et al, 2010). In addition, some single, binary eutectic, and ternary eutectic nitrate and sulfate salts were studied as the catalysts for coal gasification (Yeboah et al, 2003).…”