Carbon dioxide sequestration in incineration bottom ash

• Main Author: Kasthuree Kabilan.
• Other Authors: Wang Jing-Yuan
• Format: Final Year Project
• Language: English
• Published: 2011
• Subjects: DRNTU::Engineering::Environmental engineering::Hazardous substances
• Online Access: http://hdl.handle.net/10356/45258
• Institution: Nanyang Technological University

Mineral carbonation is one of several carbon capture and storage (CCS) methods. Incinerated waste which contains significant amounts of alkaline earth metals is considered a potential source for mineral carbonation. The resultant formation of carbonates helps reduce leaching of certain heavy metals and stabilises the waste thereby improving its recycling potential. The practice of recycling incineration bottom ash (IBA) has been around for decades and the most common method is natural weathering of the ash for 3 to 6 months. By controlling the environment, the stabilisation process may be accelerated. This project aimed to test if IBA collected from a local incineration plant was effective in sequestering CO2 via mineral carbonation under certain controlled parameters. The main objective was to identify the „best‟ set of parameters that would give rise to maximum CO2 uptake. The leaching behaviour of the corresponding ash was also assessed to see if it reduced the leaching of heavy metals – lead (Pb) and zinc (Zn).