02217nab a2200205 4500 20260520000902.0 260224s2010 xxu Catalytic pyrolysis-gasification of waste tire and tire elastomers for hydrogen production jul./ago. 2010 19/11/2010 ; 19/11/2010 8 p. ; 3928-3935 Transcripción 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. 4 Energy & fuels 24 ARTICULO Elbaba, Ibrahim F. 43728 Wu, Chunfei 43729 Williams, Paul T. 43730 172014 172014 0 0 0 0 239833 BAAB BAAB 2026-03-05 200049982 0 200049982 2026-03-05 16:07:45 2026-03-05 ARTICULO