CERE Seminar by Sara Vallejo Castano

Calcination-free calcium hydroxide production from iron slag

Abstract:

The production of Ca(OH)₂via thermal decomposition of limestone is an energy intensive process resulting in significant CO₂emissions.

However, if produced in a manner that obviates the need for the thermal decomposition of limestone, Ca(OH)₂could be a “CO₂-negative” material.

Herein, we design and demonstrate the operation of a continuous, low-temperature (< 100 ◦C), aqueous-phase process to produce Ca(OH)₂using calcium extracted from alkaline industrial wastes.