DTA/TG analysis of mechanochemicaly activated sodium carbonate
Abstract
Sodium carbonate is a material that is very good sorbent of carbon dioxide from the atmosphere, and it is a reason of it`s increasing importance in environmental protection. In order to improve it´s sorption characteristics, activation of Na2CO3 was performed by mechanochemical procedure and monitoring of changes during the relaxation time. This research is based on differential thermal analysis with thermogravimetry, in order to determine the changes that occurred on the activated samples during the relaxation period under controlled conditions. Sodium carbonate was activated for 2 and 7 minutes in a vibro mill, and then the activated samples were deposited in at room temperature and atmosphere of carbon dioxide at a humidity of 95% for 96h.
References
RODRIGUES, F. and MOLINA-SABIO, M. (1992) Activated carbons from lignocellulosic materials by chemical and/or physical activation. Carbon, 30(7), pp. 1111-1118
DÍAZ-TERÁN, J. et al. (2003) Study of chemical activation process of a lignocellulosic material with KOH by XPS and XRD. Microporous and Mesoporous Materials, 60(1–3 / 19 June) pp. 173-181
MACIÁ-AGULLÓ, J.A. et al. (2004) Activation of coal tar pitch carbon fibres: Physical activation vs. chemical activation. Carbon, 42(7), pp. 1367-1370
FRACKOWIAK, E. et al. (2002) Enhanced capacitance of carbon nanotubes through chemical activation. Chemical Physics Letters, 361(1-2), pp. 35-41
YUE, Z. et al. (2002) Economy, Preparation of fibrous porous materials by chemical activation: 1. ZnCl2 activation of polymer-coated fibers. Carbon, 40(8), pp. 1181-1191
VAMVUKA, D. et al. (2006) The effect of mineral matter on the physical and chemical activation of low rank coal and biomass materials. Fuel, 85(12–13), pp. 1763-1771
LILLO-RÓDENAS, M.A. et al. (2003) Understanding chemical reactions between carbons and NaOH and KOH: An insight into the chemical activation mechanism. Carbon, 41( 2), pp. 267-275
GALLIGAN, J.M. and MCKRELL, T.J. (2000) Thermal activation and viscosity. Physica B: Condensed Matter, 291(1–2), Pages 131-134
OBRADOVIĆ, N. et al. (2019) Kinetics of thermally activated processes in cordierite-based ceramics. Journal of thermal analysis and calorimetry, 138(5), pp. 2989-2998
WANG, Y. et al. (2005) Visualizing the mechanical activation of Src. Nature 434, pp.1040–1045
BALÁŽ, P. (2003) Mechanical activation in hydrometallurgy. International Journal of Mineral Processing, 72(1–4), pp. 341-354
MAURYA, D. et al. (2009) BiFeO3 ceramics synthesized by mechanical activation assisted versus conventional solid-state-reaction process: A comparative study, Journal of Alloys and Compounds, 477(1–2), pp. 780-784
CASTRO, A. et al. (2004) Sodium niobate ceramics prepared by mechanical activation assisted methods. Journal of the European Ceramic Society, 24(6), pp. 941-945
BERBENNI, V. et al. (2001) Effect of mechanical activation on the preparation of SrTiO3 and Sr2TiO4 ceramics from the solid state system SrCO3–TiO2. Journal of Alloys and Compounds, 329(1–2), pp. 230-238
XUE, J.M. et al. (2002) Functional ceramics of nanocrystallinity by mechanical activation. Solid State Ionics, 151(1-4), pp. 403-412
OBRADOVIĆ, N. et al. (2019) The effect of mechanical activation on synthesis and properties of MgAl2O4 ceramics. Ceramics International, 45(9), pp. 12015-12021
DJORDJEVIĆ, N.G. et al. (2020) Thermodinamic aspect of sodium carbonate mechanical transformations under different environment. Science of Sintering, 52(4), pp. 433-444
