Effects of the addition of CeO₂ on the steam reforming of ethanol using novel carbon-Al₂O₃ and carbon-ZrO₂ composite-supported Co catalysts

Abstract

For the ideal reaction routes in steam reforming of ethanol catalyzed by Co/CeO2–ZrO2, as Al2O3 was used instead of ZrO2, the effect of CeO2 did not appear, suggesting that the configuration of CeO2 and cobalt species on ZrO2 would be important.

Reforming of ethanol with carbon dioxide catalysed by silver-promoted copper–ceria–zirconia composites

“…It was reported that Cu-based catalysts showed higher ethanol and CO 2 conversions in dry reforming. 8,9 CeO 2 -ZrO 2 mixed oxides recognized as one of the most promising supports of metal species could promote DRE, 8,9,12,13,20 dry reforming of methane [27][28][29][30][31][32][33][34][35][36][37] and steam reforming of ethanol 38,41,50 because of its high oxygen transfer ability, excellent thermal stability, and strong metal-support interactions.…”

“…The detailed conditions for GC measurement appear elsewhere. 49,50 Equations to calculate conversions of ethanol and CO 2 and yields of H 2 and CO are shown in the footnote of Fig. S2.…”

“…1 Ethanol is a common product, not toxic, safely preserved, transferred, treated and further could be a very attractive hydrogen source. However, DRE has not been studied as much as steam reforming [38][39][40][41][42][43][44][45][46][47][48][49][50][51] probably because the former needs relatively higher temperature and selectivity for H 2 and CO does not increase due to the ease of decomposition of ethanol into hydrocarbon fragments at higher temperature. Nevertheless, DRE has still been desired since syngas with a H 2 /CO ratio of 1 suitable for hydrocarbon production in the Fischer-Tropsch reaction could be produced.…”

“…Our group has reported that CeO 2 -ZrO 2 composites as well as Al 2 O 3 could be excellent supports for Co and Ni metal species for steam reforming of ethanol. 49,50 In a recent study, the CeO 2 -ZrO 2 composite prepared by the sol-gel method was used as a support of Cu metal species in DRE. 1 It was found that CuCeO 2 -ZrO 2 , which was prepared using a zirconium alkoxide, a lump of CeO 2 and copper nitrate, exhibited selective formation of CO and H 2 and showed that the formation of hydrocarbon fragments of C1, C2 and C4 could effectively be inhibited.…”

“…The detailed conditions for measurement appear elsewhere. 49,50 2.2 Dry reforming of ethanol using CeO 2 -ZrO 2 -supported AgCu catalysts Fig. S2 † shows the reaction apparatus.…”