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Vortex combustion of solid fuel in boilers with horizontal and vertical cyclone forechambers Korchevoi, Y. P. &erg. Elekrrif 1997, (2). 7-10. (In Russian) Coals containing 35 wt% ash and 10-40 wt% volatiles can be burned in boilers with horizontal and vertical cyclone forechambers with minimum demand for supplemental fuel. Anthracite containing 4-9 wt% volatiles can be burned in these boilers without supplemental fuel.
Burners, Combustion Systems 9810051 i Activation energy for the oxidation of Malaysian coal chars Haji-Sulaiman, M. Z. and Aroua, M. K. .I. Insr. Energy. 1997, 70, (483), 52-56. Thermal gravimetric analysis was used to study the oxidation of two Malaysian coal chars. The Temperature Program Reaction technique, which employed the random pore model of Bhatia & Perlmutter, was used to analyse the weight-loss data. All experiments were conducted within a temperature range of 698-773 K and heating rates of 2-10 K min-' with char samples in the size range 53-75 ,Lm. The random pore model can accurately describe the oxidation of char to yield activation energy. It is similar to that obtained from model free kinetics, provided the structural parameter ~1, which is an input to the model, is taken as an adjustable parameter.
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The main by-product of a saline water beneficiatioun process currently being evaluated by coal-based industries is ettringite (CaizA114(OH)24-(SO4)h S2HzO). The study is aimed to quantify and explain the benefits of using this alkali waste to ameliorate acidic soils, by comparing its effect on plant
the precision and accuracy data obtained for quantitative analysis of total aromatics in different samples. ## Conclusions The method described in this work can be applied to the determination of total aromatics in straight-run and cracked petroleum fractions boiling up to 215ยฐC. The quantitative