000			02037nab a2200193 4500
005			20260520000829.0
008			260224s2009 xxu
245	0	0	_aVisualization of biomass pyrolysis and temperature imaging in a heated-grid reactor
260			_a _b _cene. 2009
270			_a30/07/2009 ; 30/07/2009
300			_a15 p. ; 993-1006
520			_aTranscripción del resúmen publicado por el autor: The main advantage of a heated-grid reactor for studying pyrolysis kinetics of solid fuel samples is that high heating rates of up to 1000 K/s can be obtained. However, one of the concerns is whether the temperature distribution over the grid material is uniform and whether the presence of a thermocouple welded to the grid causes any measurement errors. Biomass samples were placed on the heated-grid reactor, and the volatiles, emitted in the biomass pyrolysis process as hot gas plumes, were imaged with an infrared camera with a high framing speed. The temporal resolved infrared images indicate that the pyrolysis process does not take place at the same rate everywhere on the grid. Two-dimensional temperature images of a heated grid made of stainless steel were recorded using the method of laser-induced thermometry with thermographic phosphors. As expected from a heat-transfer model, measured temperatures were found to be significantly higher than temperatures indicated by a thermocouple welded to the bottom of the grid. It was also observed that there is a large temperature gradient between the two electrodes on which the grid is connected. It is shown that replacing a wire mesh by a foil as a grid material may lead to more homogeneous temperature distribution. The paper recommends additional research to demonstrate the suitability of the heated-grid reactor for carrying out accurate measurements.
773	0		_tEnergy & fuels _g23
942			_cARTICULO
100	1		_aPrins, M.J. _941663
100	1		_aLindén, J. _941664
100	1		_aLi, Z.S. _941665
999			_c170229 _d170229