Authors:Ao Hou, Ze Wang, Wenli Song, and Weigang Lin
rate in CO 2 atmospheres. Köpsel and Zabawski [ 7 , 8 ] found that the inherent mineral matters had some catalytic effects on the demineralized coal gasification. Otto et al. [ 9 ] found that ash from reactive coals can significantly enhance the
Authors:L. M. Federico, S. E. Chidiac, and L. Raki
reactivity of pozzolanic SCMs and glass has been demonstrated [ 14 , 15 ], where increased fineness led to an increase in early age compressive strength, even in the absence of activators. In some cases, the compressive strength of mortar bars made with
By using reactive atmospheres, the area of application of thermal analysis is expanded considerably to cover many aspects of high temperature research into fuels, extractive metallurgy, materials and catalysts. This article reviews the design of apparatus and its application in kinetic and thermodynamic studies involving atmospheres such as H2, CO, N2, NH3, CO2, H2O, SO2or3, H2S, S2, Cl2, HO, F2 and HF at low or high pressures and as low pressure plasmas. Apart from gas-solid reactions, the important influence of a controlled product gas atmosphere on decomposition reactions is discussed also. Gas-solid adsorption and solubility studies are not included.
Authors:I. Blanco, L. Oliveri, G. Cicala, and A. Recca
multifunctional epoxides: the monofunctional epoxides are primarily used as reactive diluents, viscosity modifiers, or adhesion promoters systems [ 2 ]. Epoxies are one of the most versatile classes of polymers with different applications such as metal can
The thermal reactivity of fossilized/petrified dinosaur eggshells excavated in China, Argentina and France has been studied
by means of thermal analysis/mass spectrometry (TG-MS), X-ray diffractometry (XRD) and analytical scanning electron microscopy
(SEM-EDX). The results provide more detailed information on the properties of these fossil materials and therefore allow an
improved typology of this most remarkable family of creatures.
. Therefore, the decolorization of dye effluents is attracting an attention. C.I. reactive red 198 (RR198), a dye that contains two of the most commonly used anchors—monochlorotriazine and vinyl sulfone groups—was adopted as the parent compound in this study
Authors:P. Ubbrìaco, P. Bruno, A. Traini, and D. Calabrese
In this study the process of hydration of fly ash, produced by a municipal solid waste (MSW) incinerator, is examined in water
and in a solution enriched with Ca(OH)2. The examined fly ash samples are characterized by a high content of alkaline chlorides and anhydrite and by remarkable amounts
of heavy metals. Investigations using differential thermal analysis/thermogravimetry (DTA/TG) and X-ray diffractometry (XRD)show
particular kinetics of the formation of the ettringite phase. The development of such a hydrated phase is much more intense
in the presence of an excess of Ca(OH)2so as to consume the ‘free’ sulphate in the case of the more reactive fly ash. Experimental results from thermal analysis
and X-ray diffractometry show the presence of different hydrated phases during the interaction between fly ash and aqueous
solution. The analytical determinations, related to the aqueous solution, point out an interesting decrease in concentration
of metals Pb, Zn and Cr(VI), relating to the middle period of the interaction.
The thermal reactivities of KHV6O16·3H2O and Cd(HV6O16)2·12H2O were investigated. By means of IR spectroscopy and X-ray phase analysis it was found that, after dehydration, both compounds decompose to vanadium pentoxide and the corresponding metavanadate. Potassium metavanadate and vanadium pentoxide react together to form bronzes of different compositions. In contrast, vanadium pentoxide and cadmium metavanadate are the predominant components of the reaction products obtained within the temperature range from 300° to 800°C.