III International Conference

PP-I-41REINFORCED NICKEL CATALYSTS FOR METHANE STEAM REFORMINGSаbirova Z.А., Kuzin N.A., Kirillov V.A., Danilova М.М., Rudina N.А., Moroz E.M.,Boronin A.I.Boreskov Institute of Catalysis SB RAS, Novosibirsk, RussiaE-mail: sabirova@catalysis.nsk.suDuring the past decade, there has been increased interest in new branch of powerengineering - fuel cells. In fuel cells electrochemical oxidation of hydrogen produced by thesteam reforming of methane or other hydrocarbon fuel is occurred. For more effectiveoperation of fuel cells, the endothermic methane steam reforming is combined with theexothermic oxidation of exhaust anode gas containing unreacted hydrogen. For this purpose, acombination of catalytic heat-exchanger reactors with catalytic and heat exchanging surfacesare used. On preparing a catalytic heat-exchanging surfaces the problem of formation of aheat-conducting catalytic layer on the metal surface is arises.The aim of this work was to study the peculiarities of formation of nickel compositereinforced catalysts for methane steam reforming and to investigate catalytic properties of theprepared catalysts in the steam reforming reaction.The nickel reinforced catalysts were prepared by supporting a mixture of grind industrialcatalyst samples NIAP-18 or GIAP-3 (fraction < 0,25 mm), nickel powder and chromiumoxide in organic glue on the reinforcing steel net, followed by calcinations at 760 ºС invacuum oven for 2 h. The catalyst contained 12.5 wt.% industrial catalyst, 84.0-87.5 wt.%Ni and 0.0-3.5 wt.% of Cr 2 O 3 . The textural properties and the phase composition of preparedcatalysts were investigated by mercury porosimetry, electron microscopy, X-ray spectrummicroanalysis and XRD. XPS was applied for investigation of sample element states. Thecatalysts were tested in the methane steam reforming by a flow-circulating method (atatmospheric pressure, 750 °C, H 2 O/CH 4 = 2).The XRD patterns show that Ni, α-Cr 2 O 3 and α-Al 2 O 3 phases are presented in thecomposite catalysts with adding of Cr 2 O 3 ; the NIAP-18–based composite catalyst alsocontains СаО·6Al 2 O 3 phase and Cr 2 O 3 on NiO - based solid solution phases with latticeparameter from 4.161 to 4.138 Å depending on the treatment conditions. According to SEMdata, the composite catalysts possess a corpuscle structure formed by a nickel metal matrix, in81