C:Corrosive;
1310-73-2Relevant articles and documents
Catalysis and hydrolysis properties of perovskite hydride NaMgH3
Wang,Zhang,Liu,Ouyang,Zhu
, p. S197-S201 (2013)
The addition of NaH by ball milling is shown to greatly improve the hydrogen storage properties and the hydrolysis properties of MgH2, which is related to the formation of ternary hydride NaMgH3 with specific perovskite structure. Th
Kinetic and equilibrium study on formic acid decomposition in relation to the water-gas-shift reaction
Yasaka, Yoshiro,Yoshida, Ken,Wakai, Chihiro,Matubayasi, Nobuyuki,Nakahara, Masaru
, p. 11082 - 11090 (2006)
Kinetics and equilibrium are studied on the hydrothermal decarbonylation and decarboxylation of formic acid, the intermediate of the water-gas-shift (WGS) reaction, in hot water at temperatures of 170-330°C, to understand and control the hydrothermal WGS
New thermochemical splitting cycle of sodium chloride for chlorine and sodium hydroxide production
Liu,Li,Liu,Che,Lei
, p. 39 - 46 (1995)
A new thermochemical closed cycle of sodium chloride for the preparation off chlorine and sodium hydroxide is presented in this paper. The optimum conditions of the main reactions in the cycle were obtained from a series of experimental results. The heat flow of the cycle system was calculated based on the related thermodynamic equations and data. The kinetic study of the heterogeneous reaction in the cycle was carried out by means of a thermogravimetric method. The result shows that the proposed cycle demonstrates an obviously energy-saving advantage over all the other methods of chlorine and sodium hydroxide productions. It may become economically competitive with the current electrolytic method in the future.
Aerosol-spraying synthesis of SiO2/TiO2 nanocomposites and conversion to porous TiO2 and single-crystalline TiOF2
Zhu, Jian,Zhang, Dieqing,Bian, Zhenfeng,Li, Guisheng,Huo, Yuning,Lu, Yunfeng,Li, Hexing
, p. 5394 - 5396 (2009)
Single-crystalline TiOF2 was prepared by HF-etching the SiO 2/TiO2 nanocomposite obtained via aerosol-spraying, which exhibited high activity and durability in visible-light driven photocatalysis. The Royal Society of Chem
Microstructural transformation with heat-treatment of aluminum hydroxide with gibbsite structure
Mitsui, Tomohiro,Matsui, Toshiaki,Kikuchi, Ryuji,Eguchi, Koichi
, p. 618 - 623 (2009)
Aluminum hydroxide with gibbsite structure was prepared, and the microstructural transformation of the sample heat-treated at various temperatures was investigated. The sample was characterized by fieldemission scanning electron microscopy (FE-SEM), X-ray
Interaction of Na with multilayer water on MgO(100)
Guenster,Krischok,Stultz,Goodman
, p. 7977 - 7980 (2000)
The reaction between Na and multilayer water on MgO(100)/Mo(100) has been studied by metastable impact electron spectroscopy (MIES), ultraviolet photoelectron spectroscopy (UPS), and temperature-programmed desorption (TPD). A water multilayer was exposed to Na at 100 K. During exposure, an attenuation of the surface water concentration concomitant with the formation of surface hydroxyls and metallic Na clusters is observed. After an anneal to 155 K, the metallic Na clusters disappear and the surface hydroxyls are essentially removed from the outermost surface, leaving water as the dominant surface species. Further annealing to >170 K leads to massive water and NaOH desorption, as indicated by TPD. After desorption of all multilayer components the species stabilized at the surface is primarily hydrated NaOH, which is stable up to 530 K.
Heterogeneous reaction of HOI with sodium halide salts
Moessinger, Juliane C.,Cox, R. Anthony
, p. 5165 - 5177 (2001)
The interaction of gaseous HOI with crystalline grains of NaCl and sea-salt and thin films of NaBr crystals has been studied in a wall coated tubular flow reactor coupled to a quadrupole mass spectrometer over a concentration range (0.2-8) × 1012 molecules cm-3 at 278 and 298 K. On a fresh surface, the uptake coefficients determined were independent of temperature with γ = 0.034 ± 0.009, γ = 0.016 ± 0.004, and γ = 0.061 ± 0.021 for NaBr, NaCl, and sea-salt, respectively. No increase in reactivity was observed on addition of water vapor between 0 and 23% relative humidity at 278 K. It was also shown that the reactivity of the salt surface decreased with time of exposure to HOI and that steady-state uptake was slower on aged salt surfaces. Products of the reactions released into the gas phase were IBr, ICl, and IBr + ICl for the reaction of HOI on NaBr, NaCl, and sea-salt surfaces, respectively. The atmospheric implications of the results obtained are briefly discussed.
Synthesis, crystal structure, and reactivity of Na5[CuO2](OH)2
Amann, Peter,Moeller, Angela
, p. 2571 - 2575 (2001)
Na5[CuO2](OH)2 has been obtained as orange single crystals from mixtures of NaOH, Na2U and Cu2U in sealed Ag containers. The crystal structure has been refined from X-ray diffraction data (IPDS data, Pnma, Z = 4, a = 607.4(1) pm, b = 891.2(1) pm, c = 1201.0(2) pm, R1 = 0.03). The characteristic unit is the bent [CuO2]3- complex (Z(O-Cu-O) = 170°). The reactivity of Na5[CuO2](OH)2 has been studied by DSC and in situ X-ray diffraction techniques. IR spectroscopy has been used for further characterization. The Madelung Part of the Lattice Energy (MAPLE) has been calculated as well. WILEY-VCH Verlag GmbH, D-69451 Weinheim, 2001.
Nonasodium bis(hexahydroxoaluminate) trihydroxide hexahydrate (Na9[Al(OH)6]2(OH)3 · 6 H2O) - Crystal structure, NMR Spectroscopy and thermal behaviour
Weinberger,Schneider,Zabel,Mueller,Gessner
, p. 1799 - 1805 (1996)
The crystal structure of the nonasodium bis(hexahydroxoaluminate) trihydroxide hexahydrate Na9[Al(OH)6]2(OH)3·6 H2O (4.5 Na2O·Al2O3·13.5 H2O) (up to now described as 3 Na2O·Al2O3·6 H2O, 4 Na2O·Al2O3· 13 H2O and [3 Na2O·Al2O3·6 H2O][x NaOH·y H2O], respectively) was solved. The X-ray single crystal diffraction analysis (triclinic, space group P1, a = 8.694(1) A, b = 11.344(2) A, c = 11.636(3) A, α = 74.29(2)°, β = 87.43(2)°, γ = 70.66(2)°, Z = 2) results in a structure, consisting of monomeric [Al(OH)6]3- aluminate anions, which are connected by NaO6 octahedra groups. Furthermore the structure contains both, two hydroxide anions only surrounded by water of crystallization and OH groups of [Al(OH)6]3- aluminate anions and a hydroxide anion involved in three NaO6 coordination octahedra directly and moreover connected with a water molecule by hydrogen bonding. The results of 27Al and 23Na-MAS-NMR investigations, the thermal behaviour of the compound and possible relations between the crystal structure and the conditions of coordination in the corresponding sodium aluminate solution are discussed as well. Johann Ambrosius Barth 1996.
Heterogeneous kinetics of the uptake of HOBr on solid alkali metal halides at ambient temperature
Mochida,Akimoto,Van Den Bergh,Rossi
, p. 4819 - 4828 (1998)
The heterogeneous reactions of HOBr with solid crystalline NaCl [HOBr(g) + NaCl(s) → BrCl(g) + NaOH-(s)] and KBr [HOBr(g) + KBr(s) → Br2(g) + KOH(s)] substrates at ambient temperature have been investigated using a Teflon coated Knudsen cell reactor. Powder, grain, and spray-deposited salt substrates were used for the measurement of the HOBr reactivity. The observed uptake probability depends on the total external surface area of the salt substrates. For NaCl substrates, Br2 and BrCl are observed as products; for KBr substrates, Br2 is observed as the sole product. In both cases, a dependence of the initial uptake probability γ0 on HOBr flow rate has been observed. The initial uptake is large at low flow rate and 10 times smaller at high flow rate. Values of γ0 ≤ (6.5 ± 2.5) × 10-3 for NaCl and γ0 ≤ 0.18 ± 0.04 for KBr are obtained under our experimental conditions of limiting low flow rates akin to atmospheric conditions. The production of Br2 is observed even for HOBr interacting on solid NaNO3, a non-halogen containing substrate. The yield measurements imply that a HOBr self-reaction occurs on salt surfaces according to 2HOBr → Br2 + H2O + 1/2O2. The decrease in Br2 yield with increasing HOBr flow rate from 100 to 50% indicates that a competition between the heterogeneous reaction of HOBr with NaCl or KBr and the self-reaction of HOBr takes place on the solid salt surface under laboratory experimental conditions. The decrease of γ0 with time indicates that approximately 5-10% of the Br atoms on a KBr surface interact with HOBr.
