OP-II-3

PP-III-19STEAM, DRY AND DRY-STEAM REFORMING OF METHANE TOSYNTHESIS GAS ON POROUS NICKEL BASED CATALYSTSFedorova Z.A., Danilova M.M., Kirillov V.A., Zaikovskii V.I., Kuzin N.A.,Krieger T.A., Kuzmin V.A.Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia,e-mail: Sabirova@catalysis.ruCH 4 and CO 2 are the base biogas components and their conversion leads to thesyngas production. For carrying out the endothermic reactions of steam, dry or drysteamreforming of CH 4 , intensive heat transfer to the reaction zone is required.Therefore, the catalyst must have a high thermal conductivity. It is most promising touse catalyst on metallic supports. This work was aimed to the developing of thenickel catalysts supported on the porous nickel for CH 4 conversion to syngas,studying their catalytic properties in the reactions of H 2 O, CO 2 and mixed H 2 O-CO 2reforming of CH 4 in the constructed pilot reactor.The developed catalysts contained 5-10 wt.% MgO and 3-8 wt.% Ni supported onporous nickel obtained by rolling (S sp ∼0.15 m 2 /g, V Σ ∼0,1 cm 3 /g, r preval ∼5-60 μm). Thecatalysts were characterized by XRD, low-temperature adsorption of nitrogen, SEMand TEM HR in combination with EDX analysis.Catalytic activity in H 2 O, CO 2 or mixed H 2 O-CO 2 reforming of CH 4 was determined bya flow method (750°С, 1 atm, CH 4 :H 2 O = 1:2 or CH 4 :CO 2 :N 2 = 1:1:0,86 and CH 4 :H 2 O:CO 2= 1:1.54:0.85, initial mixture flow rate – 25 l/h). The catalytic activity in the steam reformingof CH 4 was additionally determined by a flow-circulation method (750°С, 1 atm,Н 2 О/СН 4 =2.0, initial mixture flow rate - 11,8 l/h). Prior to the testing the catalysts werereduced at 750°С in Н 2 flow during 1 h.The activity of the initial nickel support was low (Table 1, fig.2). Supporting nickel onthe MgO underlayer considerably increases catalyst activity in the reactions. Fig.1 showsthe effect of duration H 2 O and CO 2 -H 2 O reforming on СН 4 conversion on nickel catalysts.Table 1. Catalytic activity of nickel supported catalysts in the steam reforming of CH 4(flow-circulation method, 750°C, 1 atm, H 2 O/CH 4 = 2, m cat = 0,80g)Catalyst CH 4 conversion, % k, сm 3 /g cat ×s×atmrpNi (0,1 mm) 9 44,6 % Ni/rpNi + 6 % MgO (0,1 mm) 73 116 % Ni/rpNi + 6,3 % MgO (0,1 mm) 85 235.0 % Ni/pNi+5.0 % MgO (1 mm) 70 9.67.8 % Ni/pNi +5.0 % MgO (1 mm) 72 10.6NIAP-18 (fraction 0,25-0,50 mm) 74 9.4474