REVISTA DYNA ENERGÍA

Key words:

Carbonatación acelerada, cenizas de incineración, dióxido de carbono, mineralización, gases efecto invernadero, residuos térmicos, Accelerated carbonation, thermal residues, APC, mineralization, carbon dioxide, greenhouse gases.

Article type:

ARTICULO DE INVESTIGACION / RESEARCH ARTICLE

Section:

RESEARCH ARTICLES

Greenhouse gases are emitted to the atmosphere through natural processes and human activities. The increase in emissions has forced the international community towards the adoption of actions focused on their reduction. Carbon dioxide sequestration by carbonation is one of the alternatives under development in order to achieve that objective.

In carbonation processes diverse reagents can be used, as mineral deposits and industrial wastes. During the present research it was proved that Air Pollution Control (APC) wastes, one of the thermal residues generated in Municipal Solid Waste Incineration (MSWI) plants, due to their chemical properties and composition, are a source of alkaline material required for the potential sequestration of the CO2 emitted by the industrial activities.

An accelerated carbonation process was investigated for APC ashes. Samples from different MSWI plants were treated by gas/solid carbonation at different temperatures and carbon dioxide concentrations. The residues were characterized before and after the treatment with the purpose of knowing their chemical composition, their acid neutralization capacity, mineralogical phases, thermal decomposition and leaching behaviour. The treated samples were analyzed by different methodologies to obtain information about the carbonation degree during the treatment.

The results obtained allow concluding that CO2 absorption using APC wastes should be considered as an effective alternative in terms of safety carbon dioxide storage and a technology that can contribute to the mitigation of carbon dioxide emissions.

Key words: Accelerated carbonation, thermal residues, APC, mineralization, carbon dioxide, greenhouse gases.