Carbonation of a Synthetic CAF Compound by CO Absorption and Its Effect on Cement Matrix.

In the field of construction materials, the development of fundamental technologies to reduce energy consumption and CO emissions, such as manufacturing process improvement and the expanded use of alternative materials, is required. Technologies for effectively reducing energy consumption and improving CO absorption and reduction that can meet domestic greenhouse gas reduction targets are also required. In this study, calcium-aluminate-ferrite (CAF), a ternary system of CaO·AlO·FeO, was sintered at a low temperature (1100 °C) to examine the possibility of CO adsorption, and excellent CO absorption performance was confirmed, as the calcite content was found to be 11.

The Characteristics of Self-Hydration and Carbonation Reaction of Coal Ash from Circulating Fluidized-Bed Boiler by Absorption of CO.

The by-products of the circulating fluidized-bed boiler combustion (CFBC) of coal exhibit self-hardening properties due to the calcium silicates generated by the reaction between SiO and CaO, and the ettringite generated by the reaction of gypsum and quicklime with activated alumina. These reactions exhibit tendencies similar to that of the hydration of ordinary Portland cement (OPC). In this study, the self-hydration and carbonation reaction mechanisms of CFBC by-products were analyzed.