Accelerated carbonation of different size fractions of bottom ash from RDF incineration |
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| Authors: | R. Baciocchi G. Costa E. Lategano C. Marini A. Polettini R. Pomi P. Postorino S. Rocca |
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| Affiliation: | 1. Dept. Civil Engineering, University of Rome “Tor Vergata”, Rome, Italy;2. Dept. Physics “E. Amaldi”, University Roma Tre, Rome, Italy;3. Unità CNISM Roma1, University of Rome “La Sapienza”, Rome, Italy;4. Dept. Hydraulics, Transportation and Roads, University of Rome “La Sapienza”, Rome, Italy;5. “Coherentia” CNR-INFM, University of Rome “La Sapienza”, Rome, Italy;6. Dept. Physics, University of Rome “La Sapienza”, Rome, Italy;1. Laboratory of Environmental Engineering, University of Rome “Tor Vergata”, Via del Politecnico 1 – 00133 Rome, Italy;2. Department of Civil and Environmental Engineering, University of Rome “La Sapienza”, Via Eudossiana 18 – 00184 Rome, Italy;1. AFATEK A/S, Selinevej 18, Port 11, DK-2300 København S, Denmark;2. Danish Waste Solutions ApS, Agern Allé 3, DK-2970 Hørsholm, Denmark;3. The Danish Technological Institute, Gregersensvej 8, DK-2630 Taastrup, Denmark;1. Competence Centre for Energy and Environmental Engineering, THM University of Applied Sciences, Wiesenstr. 14, 35390 Gießen, Germany;2. Soil Geography/Soil Science, Department of Geosciences, University of Cologne, Albertus-Magnus-Platz, 50923 Cologne, Germany;1. Graduate Institute of Environmental Engineering, National Taiwan University, 71 Chou-Shan Road, Da-an District, Taipei City 10673, Taiwan;2. Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Zhongxiao E. Road, Taipei City 10608, Taiwan;1. KU Leuven, Dept. Chemical Engineering, Willem de Croylaan 46, 3001 Leuven, Belgium;2. KU Leuven, Dept. Earth and Environmental Sciences, Celestijnenlaan 200e, 3001 Leuven, Belgium;3. KU Leuven, Dept. Civil Engineering, Kasteelpark Arenberg 40, 3001 Leuven, Belgium |
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| Abstract: | This paper investigates the effects of accelerated carbonation on the characteristics of bottom ash from refuse derived fuel (RDF) incineration, in terms of CO2 uptake, heavy metal leaching and mineralogy of different particle size fractions. Accelerated aqueous carbonation batch experiments were performed to assess the influence of operating parameters (temperature, CO2 pressure and L/S ratio) on reaction kinetics. Pressure was found to be the most relevant parameter affecting the carbonation yield. This was also found to be largely dependent on the specific BA fraction treated, with CO2 uptakes ranging from ～4% for the coarse fractions to ～14% for the finest one. Carbonation affected both the mineralogical characteristics of bottom ash, with the appearance of neo-formation minerals, and the leaching behaviour of the material, which was found to be mainly related to the change upon carbonation in the natural pH of the ash. |
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