Effect of Impurities on the Decarbonization of Calcium Carbonate Using Aqueous Sodium Hydroxide.

ABSTRACT: Decarbonizing calcium carbonate (CaCO₃) is a crucial step for a wide range of major industrial processes and materials, including Portland cement (PC) production. Apart from the carbon footprint linked to fuel combustion, the process CO₂ embodied within CaCO₃ represents the main concern for the sustainability of production. Our recent works demonstrated that it is possible to avoid both the fuel and process CO₂ by reacting CaCO₃ with aqueous NaOH and obtain Ca(OH)₂ and Na₂CO₃·xH₂O (x = 0 and 1). This present study provides a further understanding of the process by testing different raw calcareous sources. A high decarbonization (∼80%) of CaCO₃ was achieved for silica-

SUBMITTER: Simoni M 

PROVIDER: S-EPMC9472277 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature