7487-88-9Relevant articles and documents
Kinetics study of the SO2 sorption by Brazilian dolomite using thermogravimetry
Crnkovic,Milioli,Pagliuso
, p. 161 - 166 (2006)
Sulfur emission in coal power generation is a matter of great environmental concern. Limestone sorbents are widely used for reducing such emissions. This work applies thermogravimetry to determine apparent activation energy and frequency factor on the sorption of SO2 by limestone. The kinetic parameters were determined from Arrhenius plots generated from TG/DTG measurements. The experiments were carried out under isothermal conditions between 600 and 900 °C. A natural dolomite with a mean size of 650 μm was used. The Arrhenius plot shows that there is a clear change on reaction mechanism in the range of temperatures between 800 and 875 °C. Supposedly, beyond 850 °C sintering comes to increasingly restrain reaction. For temperatures up to 850 °C the frequency factor and the apparent activation energy resulted, respectively, 1.410 s-1 and 8.8 kJ mol-1.
Molten potassium pyrosulphate: Reactions of oxides of ten main-group elements
Salem,Tariq
, p. 123 - 125 (1997)
The reactions of MgO, CaO, SrO, BaO, ZnO, CdO, SnO, PbO, Pb3O4 and As2O3 with K2S2O7 were investigated using TG and DTA methods of thermal analysis. The exothermic peaks diagnost
Differential thermal study of the interactions between sulphates, oxides and ferrites
Boyanov
, p. 109 - 115 (1997)
The solid state interactions in the ZnSO4.7H2O-MeO (Me = Cd, Pb, Ca, Mg) and CuSO4.5H2O-MeO (Me = Zn, Cd, Pb, Ca, Mg) systems, sulphate-ferrite systems, double sulphate systems and triple system FeSO4
Solvent-assisted construction of diverse Mg-TDC coordination polymers
Song, Ying,Feng, Mei-Ling,Wu, Zhao-Feng,Huang, Xiao-Ying
, p. 1348 - 1357 (2015)
Upon alteration of selected solvents, the reactions of 2,5-thiophenedicarboxylic acid (H2TDC) and Mg(NO3)2·6H2O afforded four diverse coordination polymers, namely Mg2(TDC)2(EG)2.5·0.5EG (1), Mg(TDC)(DMSO) (2), (Me2NH2)[Mg2(TDC)2(Ac)]·1.5DMA·0.5H2O (3), and [Mg2(TDC)2(DMF)2(EtOH)(H2O)2]·DMF (4) (EG = ethylene glycol, DMSO = dimethyl sulfoxide, Ac = acetate anion, DMA = N,N′-dimethylacetamide, DMF = N,N′-dimethylformamide, EtOH = ethanol). Single-crystal X-ray diffraction analyses indicated that compounds 1-3 possessed a three-dimensional (3D) network while 4 adopted a two-dimensional (2D) layered structure. Noticeably, the coordinated solvent molecules adopt distinct coordination modes which play a vital role in constructing the Mg-TDC structures. In 1, the solvent EG molecules as bi-dentate bridging ligands help in interconnecting the Mg-TDC layers to a 3D framework, whereas the solvent DMSO molecules in 2 and the Ac- anions generated from decomposition of DMA in 3 are coordinated in a μ2-fashion and in a (k2-k2)-μ3 mode, respectively, leading to infinite chains as secondary building units. In the layered structure of 4, the collaboration of coordinated DMF, EtOH and H2O molecules assists in inducing the noncentrosymmetric structure. The compounds were fully characterized by PXRD, TGA, EA, and IR. The luminescence properties of 1-3 and the second-harmonic generation (SHG) properties of 4 were studied. 3 emitted bright green light upon the excitation of 365 nm UV light, while 4 displayed sound SHG response.
Temperature dependence of electric permittivity of linear dielectrics with ionic and polar covalent bonds
Napijalo,Nikolic,Dojcilovic,Napijalo,Novakovic
, p. 1255 - 1258 (1998)
Results are presented of experimental verification of the relation describing temperature dependence of permittivity of linear dielectrics with ionic and polar covalent bonds. The relation has been derived by means of the thermodynamic method [1]. The verification has been realized on sodium chloride, sulfates, phosphates and arsenates of magnesium and cobalt, as well on barium titanate in paraelectric phase. The experimental results confirm the theoretical relation and, at the same time, indicate the possibility of determining the linearity region of properties of these dielectrics.
A novel method of non-violent dissolution of sodium metal in a concentrated aqueous solution of Epsom salt
Lakshmanan,Prasad,Ponraju,Krishnan
, p. 3460 - 3468 (2004)
A new technique of non-violent and fast dissolution of sodium metal in a concentrated aqueous solution of Epsom salt (MgSO4.7H2O) at room temperature (RT) has been developed. The dissolution process is mildly exothermic but could be carried out even in a glass beaker in air under swift stirring condition. The reaction products consist of mixed salts of MgSO 4 and Na2SO4 as well as Mg(OH)2 which are only mildly alkaline and hence are non-corrosive and non-hazardous unlike NaOH. A 50mL solution having Epsom salt concentration of 2M was found to give the optimal composition for disposal of 1g of sodium. Supersaturated (>2.7M), as well as dilute (a solid waste of 4.7g per g of sodium dissolved which is comparable with the waste (4g) produced in 8M NaOH solution. A 1.4M Epsom solution sprayed with a high-pressure jet cleaner at RT in air easily removed the sodium blocked inside a metal pipe made of mild steel. The above jet also dissolved peacefully residual sodium collected on the metal tray after a sodium fire experiment. No sodium fire or explosion was observed during this campaign. The Epsom solution spray effectively neutralized the minor quantity of sodium aerosol produced during this campaign. This novel technique would hence be quite useful for draining sodium from fast breeder reactor components and bulk processing of sodium as well as for sodium fire fighting.
Kinetic model for the reaction of ilmenite with sulphuric acid
Jablonski,Przepiera
, p. 583 - 590 (2001)
The kinetic of the reaction ilmenite with sulphuric acid was studied using non-adiabatic and non-iso-thermic calorimetric device system. The kinetic model based on interphase surface and kinetic models round in literature which are usually applied were te
THREE-DIMENSIONAL CROSSLINKER COMPOSITION AND METHOD OF MANUFACTURING ELECTRONIC DEVICES USING THE SAME
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, (2022/01/04)
The inventive concept relates to a three-dimensional crosslinker composition and a method of manufacturing an electronic device using the same. According to the inventive concept, the three-dimensional crosslinker composition may be represented by Formula 1 below.
Kinetics of the topochemical reaction of the solid solutions of magnesia spinels: Mg(Cr0.5Fe0.5)2O4, Mg(Al0.5Cr0.5)2O4, Mg(Al0.5Fe0.5)2O4 with sulphur oxides
Gerle, Anna,Piotrowski, Jerzy,Podwórny, Jacek
, (2019/08/01)
Spinel-containing materials belong to an important group of refractories used as high-temperature unit linings. A crucial element of the conditions in which they are used is gaseous corrosion caused by sulphur oxides: SO2 and SO3. In previous investigations into reactions of magnesia spinels with sulphur oxides it was found that spinels’ reactivity could be considerably influenced by a phase transition (order – disorder) in the cation sublattice, resulting in a change of their reactivity in relation to SO2/SO3. The aim of the study was to investigate the kinetics of topochemical reactions between equimolar solid solutions of magnesia spinels and sulphur oxides before and after the order – disorder phase transformation in the structure begins. Research into the reaction of equimolar solid solutions Mg(Cr0.5Fe0.5)2O4, Mg(Al0.5Cr0.5)2O4, Mg(Al0.5Fe0.5)2O4 with SO3 was undertaken due to the fact that spinels form solid solutions in basic refractories. To conduct kinetic measurements, a semi-flow reactor was designed and constructed, in which investigations were carried out at the temperatures of 773 and 973 K and time range: 0–7 h. A mixture of air and SO2 (13%) was used. The obtained results have been compared with the kinetic results from the previous work obtained on two-cation spinels: MgAl2O4, MgFe2O4, MgCr2O4. The influence of the degree of inversion in spinel structure on the kinetics of the process was discussed.
COMPOUND AND ORGANIC LIGHT-EMITTING DEVICE INCLUDING THE SAME
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, (2016/06/28)
The present disclosure relates to a compound represented by Formula 1 and an organic light-emitting device including the same. The compound represented by Formula 1 has excellent stability and is suitable as an electron transporting material. An organic light-emitting device using the compound of Formula 1 may have high efficiency, low voltage, high luminance, and long lifespan.
