Zinc cyclen developed for carbon dioxide hydration process

Our study found that Zinc-cyclen can accelerate hydration and precipitation processes, with the amount of precipitated CaCO3 and the time it takes for the solution to reach pH 7 influenced by CO2 pressure and Zinc-cyclen concentration. Higher CO2 pressure led to more precipitate CaCO3 mass, but it took longer for the solution to reach pH 7.0. The optimal Zinc-cyclen concentration was 0.6 g/L, resulting in 1.845 g of CaCO3 precipitate and 9.36 minutes to reach pH 7.0. The study suggests that Zinc-cyclen concentration has a marginally significant impact on precipitate production and time to reach pH 7.0.