Back to Search
Start Over
CO2 sequestration through aqueous accelerated carbonation of BOF slag: A factorial study of parameters effects
- Source :
- Journal of Environmental Management. 167:185-195
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- A factorial study was conducted on basic oxygen furnace slag from a steelmaking industry with the aim of systematically identifying the individual and joint effects of the operating parameters (total pressure, CO2 concentration in the gas phase and temperature) on the CO2 sequestration yield of a direct aqueous carbonation process. Each operating parameter was varied over a range of three levels according to a 3(3) factorial design, resulting in 27 carbonation experiments. The carbonation performance and the changes in particle size and mineralogical characteristics of the slag were investigated in detail. The analysis of the experimental results indicated large effects of the operating factors on CO2 uptake, which was observed to span the range 6.7-53.6 g CO2/100 g slag. The best carbonation performance achieved was particularly significant compared to previous studies, even more considering the relative mild operating conditions adopted (P = 5 bar, C = 40% vol. CO2, T = 50 °C, t = 4 h). The analysis of the solid and liquid phases at the end of the carbonation treatment evidenced significant changes in the physical, chemical and mineralogical composition of the material. In particular, evidence was gained of other elements (Mg, Fe, Mn, Zn) in addition to Ca being intensively involved in the carbonation reactions, with a variety of carbonate phases being produced in addition to calcium carbonate forms.
- Subjects :
- Carbon Sequestration
Basic oxygen steelmaking
Environmental Engineering
Materials science
Carbonation
Carbonates
0211 other engineering and technologies
Industrial Waste
02 engineering and technology
010501 environmental sciences
Management, Monitoring, Policy and Law
01 natural sciences
Calcium Carbonate
chemistry.chemical_compound
Particle Size
Waste Management and Disposal
accelerated carbonation
0105 earth and related environmental sciences
021110 strategic, defence & security studies
business.industry
Metallurgy
Temperature
Water
Slag
response surfaces
General Medicine
Factorial experiment
Carbon Dioxide
Steelmaking
steelmaking slag
Calcium carbonate
chemistry
Steel
factorial design
visual_art
mineralogy
visual_art.visual_art_medium
Carbonate
Particle size
business
Subjects
Details
- ISSN :
- 03014797
- Volume :
- 167
- Database :
- OpenAIRE
- Journal :
- Journal of Environmental Management
- Accession number :
- edsair.doi.dedup.....f87d1995b5d8404f4638ae8d5453f0af