ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
This work is concerning to production of quicklime (CaO) from thermal decompositionof the calcite limestone (CaCO3) using analytical and instrumental techniques (TGA and MS) toevaluate kinetic and thermodynamic effects as well as heat/mass transfer associates with the processoperation. On the other hand, experiments of morphologic, structural and textural characterization(XRD, SEM and BET surface area) were carried out in order to evaluate the quality of thequicklime produced. Under experimental studied conditions it was observed that carbon dioxide(CO2) inhibits the thermal decomposition reaction rate. In addition, it was observed that steam(H2O) can catalyze this reaction but it can also cause sintering of the oxide formed. It was alsoobserved that the calcination reaction is greatly limited by mass transfer effects and that thecontrolled thermal decomposition generates an increase in the solid porosity. The formed CO2 havealso increased the sintering phenomena in the oxide structure, resulting in less reactive quicklime
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.591-593.352.pdf
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