For eutectic doping the same preparation procedure mentioned
above was followed using the starting materials in molar ratios of
Li2CO3:SiO2:K2CO3 of 2.1:1.0:0.2 (Xiong, 2003) for having a completely
molten carbonate during CO2 sorption. In this case, the
reaction of calcination can be represented as follows:
Li2CO3 +
1.0 SiO2 +
0.2 K2CO3 1.0 Li4SiO4 +
0.1 Li2CO3