000			01683nab a2200205 4500
005			20260520000840.0
008			260224s2009 xxu
245	0	0	_aInfluence of operating variables on solid carbons obtained by low-density polyethylene pyrolysis in a semicontinuous fast heating quartz reactor
260			_a _b _cnov./dic. 2009
270			_a09/06/2010 ; 09/06/2010
300			_a9 p. ; 6102-6110
520			_aTranscripción del resumen del autor. Low-density polyethylene (LDPE) was pyrolyzed in a quartz semicontinuous feed reactor with fast heating to obtain solid carbons. Two different carbons were obtained by pyrolysis: pyrolytic carbon deposited on the wall of the reactor and spherical carbon from gas-phase nucleation and growth in the inner part of the reactor. The spherical carbon constituted the major portion of the solid carbon product (95%-99%). A two-factorial experimental design was used to study the influence of pyrolysis variables (temperature, nitrogen flow rate, and LDPE feed rate) on morphology, solid carbon yield, and structure. The yield of LDPE to solid carbon was high (15.3%-49.4%) and increased as the temperature and residence time each increased. Solid carbons with more homogeneous morphology and a higher degree of structural order were obtained at higher temperatures as well as lower nitrogen flow rates and lower LDPE feed rates (both leading to a higher residence time of pyrolytic gases).
581			_a6
773	0		_tEnergy & fuels _g23
942			_cARTICULO
100	1		_aAlonso-Morales, Noelia _942429
100	1		_aGilarranz, Miguel A. _942430
100	1		_aHeras, Francisco _942431
999			_c170859 _d170859