000 02217nab a2200205 4500
005 20260520000902.0
008 260224s2010 xxu
245 0 0 _aCatalytic pyrolysis-gasification of waste tire and tire elastomers for hydrogen production
260 _a
_b
_cjul./ago. 2010
270 _a19/11/2010 ; 19/11/2010
300 _a8 p. ; 3928-3935
520 _aTranscripción del resumen del autor. Hydrogen production from waste tires was investigated using a two-stage pyrolysis-gasification reactor and Ni-Mg-Al (1:1:1) as a catalyst. In addition, the elastomer constituents most commonly used in tires, natural rubber (NR), styrene-butadiene rubber (SBR), and butadiene rubber (BR), were also investigated. Experiments were conducted at a pyrolysis temperature of 500 °C and gasification temperature of 800 °C. The results showed that the gas and hydrogen yield were increased for the tire and elastomer constituents during pyrolysis-gasification. However, there was a dramatic increase in H2 and CO concentrations as well as a consequent decrease in CH4 and C2-C4 concentrations when the Ni-Mg-Al catalyst was applied to the pyrolysis-gasification process. For example, hydrogen production increased from 0.68 to 5.43 wt % for the catalytic steam pyrolysis-gasification of waste tire in the presence of Ni-Mg-Al catalyst. The highest hydrogen production (15.26 wt %) was obtained for the BR feedstock. Reacted catalysts were characterized using a variety of methods, including temperature-programmed oxidation (TPO) and scanning electron microscopy (SEM) with energy dispersive X-ray spectrometry (EDXS). The SEM results showed that large amounts of filamentous carbons were observed for the reacted Ni-Mg-Al catalysts derived from all the feedstocks. The total amount of coke deposition on the reacted catalyst, calculated from TPO experiments, was lowest for the BR feedstock (7.0 wt %) and was 31, 21.8, and 18.4 wt % for the waste tire, NR, and SBR samples, respectively.
581 _a4
773 0 _tEnergy & fuels
_g24
942 _cARTICULO
100 1 _aElbaba, Ibrahim F.
_943728
100 1 _aWu, Chunfei
_943729
100 1 _aWilliams, Paul T.
_943730
999 _c172014
_d172014