Gas-phase hydroxyl radical emission in the thermal decomposition of lithium hydroxide

Article Abstract:

The gas-phase hydroxyl (OH) radical emission occurring in the thermal decomposition of lithium hydroxide (LiOH) has been studied. Temperature programmed reaction experiments in a vacuum flow tube reactor were carried out between 500 to 1300 K at a pressure of 2 Torr. Laser-induced fluoroscopy and quadrupole mass spectrometry were used in measuring the volume of OH and other gas products. Results indicated that OH radicals may have originated from the surface OH groups on Li2O or the residual LiOH in the LiOH/Li2O solid solution. The OH production may be explained by the partial equilibrium in the reaction LiOH + 1/4O2 <--> 1/2Li2O + OH.

Analysis, Phase transformations (Statistical physics), Phase transitions (Physics), Spectra, Lithium, Lithium (Metal)

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Gas-phase hydroxyl radical generation by the surface reactions over basic metal oxides

Article Abstract:

The catalytic characteristics of platinum, basic metal oxides such as MgO, Cao, SrO and BaO, and Al2O3 were investigated including the mechanisms governing the generation of gas-phase hydroxyl (OH) radicals. The generation of OH was observed in the catalytic reactions of water or hydrogen using the laser-induced fluorescence microscopy. It was concluded that basic metal oxides and platinum were effective catalysts for fast OH generation from water but not from hydrogen.

Metallic oxides, Metal oxides, Metal catalysts, Aluminum oxide, Platinum catalysts

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Reduction features of NO over a potassium-doped C12A7-[O.sup.-] catalyst

Article Abstract:

Reduction features of NO over a potassium-doped C12A7-[O.sup.-] catalyst were studied. The C12A7-[O.sup.-]/K catalyst shows good NO storage/reduction abilities with a good sulfur tolerance and the NO conversion and [N.sub.2] selectivity on the C12A7-[O.sup.-]/K catalyst depends on the sample temperature, percentage of potassium, the reduction agent and the composition in the mixture gases.

All Other Basic Inorganic Chemical Manufacturing, Industrial Gas Manufacturing, Industrial gases, Industrial inorganic chemicals, not elsewhere classified, Nitric Oxide, Potassium & Sodium Compounds, Potassium & Compounds, Carbon compounds, Atomic properties, Potassium compounds

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