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Hydrodynamic properties, such as intrinsic viscosity and diffusivity, were measured to investigate the solution state characteristics of coal-derived materials in three organic solvents: toluene, pyridine, and N-methyl-2-pyrolidinone. A coal-derived asphaltene was prepared using coal liquefaction residue and was used as the solute. The translational diffusion coefficient of the coal-derived asphaltene...
In fluidised bed combustion heterogeneous reactions catalysed by the bed material, CaO, and char are significant for the emission levels for instance of NO, N2O, and CO. The catalysts present in the bed affect significantly the selectivity of HCN and NH3 oxidation, which are known as precursors of NOx (i.e. NO and NO2) and N2O emissions from solid fuel combustion. Thus the catalytic activity of biomass...
An experimental study on interactions between nitrogen oxides emissions in the presence of SO 2 is proposed. Two different coals were burnt in a laboratory-scale fluidised bed (FB) unit in air and in an artificial atmosphere of O 2 /N 2 /SO 2 . The change of operating variables was also considered. Additionally, flow reactor studies on HCN oxidation, which is an important...
Flow reactor experiments were done to study the decomposition of N 2 O at atmospheric pressure and in a temperature range of 600-1000 o C. Dilute mixtures of N 2 O with H 2 , CH 4 , CO with and without oxygen with N 2 as carrier gas were studied. To see directly the relative importance of the thermal decomposition versus the destruction by free radicals...
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