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Home / Science of Advanced Materials, Volume 10, Number 9

Thermodynamic Calculation and Analysis of Steel Slag for CO2 Sequestration

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Steel slag is generated from steelmaking process, and it is similar to cement clinker in phase composition. However, steel slag has not been effectively utilized because of its high free CaO content. A series of chemical reactions will occur when steel slag is modified by using H2O and CO2. In this paper, the characteristics of the modified reactions were analyzed based on thermodynamic principle. Thermodynamic investigation shows that for the same phase in steel slag, CO2 is preferred than H2O in reaction with that. The Gibbs free energy change of f-CaO in steel slag reacting with H2O and CO2 is negative at a certain temperature and is the smallest, that is, f-CaO is the most unstable. By comprehensive comparison, the Gibbs free energy change of the reaction of CO2 with f-CaO is the smallest.

Keywords: CO2 SEQUESTRATION; H2O; STEEL SLAG; THERMODYNAMIC CALCULATION

Document Type: Research Article

Publication date: 01 September 2018

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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