Effect of small amount of Fe addition on ethanol steam reforming over Co/Al2O3 catalyst

Steam reforming of ethanol over K promoted Co catalyst

“…(2)-(4) [12,15,18,21,23,25,26]. In addition, the methanation of CO is not a dominant reaction for methane formation over Cobased catalysts [25], which suggests that methane was formed as a by-product via the decomposition of acetaldehyde, as shown in Eq.…”

“…The typical W/F, catalyst weight, and ethanol flow were, respectively, 0.65 g h mol −1 , 30 mg, and 770 mol min −1 . The reaction condition was the same as our precious reports [26] for comparative purpose. Products were analyzed using GC-TCD (GC-8A; Shimadzu Corp.) and GC-FID (GC-8A; Shimadzu Corp.).…”

“…5 shows IR spectra during ethanol-TPD over Co/␣-Al 2 O 3 and Co/1K/␣-Al 2 O 3 catalysts. Assignment of the adsorbed species was conducted based on the literature [26,[41][42][43][44][45][46][47][48][49][50][51][52]. When ethanol was adsorbed at 323 K, C-H stretching of CH 3 -and -CH 2 -(around 3000 cm −1 ), C-H bending of CH 3 -and -CH 2 -(1450 and 1380 cm −1 ), and C-C-O stretching (1120 and 1070 cm −1 ) vibrations peaks were observed.…”

“…is strongly desired. For suppressing coke and methane formation in ethanol steam reforming over Co-based catalyst, two solutions have been proposed: one is an addition of a second element [12,18,21,22,25,26,29]; another is changing catalytic support [22][23][24]30,31]. The Llorca group reported that Co/ZnO promoted with Fe, Mn, or Cr showed high activity for ethanol steam reforming, in which Co and these metals produced alloys [12,18,21].…”

“…We reported that a small amount of Fe addition to Co/␣-Al 2 O 3 is extremely effective for promoting ethanol steam reforming activity [22,26]. The supported Co and Fe on the catalyst produced Co-Fe alloy with fcc structure [26][27][28], in which the adsorbed acetate species were stabilized and thereby suppressed coke and methane formation [26].…”