Boreskov Institute of Catalysis of the Siberian Branch of Russian ...

OP-IV-7SYNTHESIS GAS PRODUCTION FROM BIO-OIL:STEAM REFORMING OF ETHANOL AS A MODEL COMPOUNDYaseneva P., Pavlova S., Sadykov V., Saputina N., Belochapkin S. 1 , Ross J. 2Boreskov Institute of Catalysis SB RAS, Pr. Lavrentieva, 5, 630090, Novosibirsk, Russia;1 Materials & Surface Science Institute, Limerick, Ireland;2 University of Limerick, Limerick, IrelandCurrently, biomass via the fast pyrolysis converts to bio-oil typically being a complexmixture of oxygenates. Catalytic steam reforming (SR) of such bio-oil is an attractive route toproduce hydrogen and so-called bio-synthesis gas which could be used as a potential sourcefor production of renewable liquid fuels (dimethyl ether or hydrocarbons by Fisher-Tropshprocess) and valuable chemicals [1]. Ethanol is one of the major components presents in biooil,therefore, steam reforming of ethanol (ESR) as a model bio-oil compound has beenstudied for the development of an efficient bio-oil processing via SR. Realization of bio-oilSR in structured reactors promotes the increase of syngas output that demands the study of thereaction at short contact times over relevant catalysts of a high activity [2].In previous study, we reported that among a large number of catalysts, Ru- and Ni-Cu-Crcontainingsamples based on doped Ce-ZrO x are the most active and coking stable in ESR [3].In the present work, the influence of such process parameters as a feed composition, contacttime, temperature on the ESR proceeding is studied to obtain a high yield of syngas with agiven composition.ExperimentalThe catalysts 10%Cu-Ni-Cr/Ce 0.45 Zr 0.45 Sm 0.1 /γ-Al 2 O 3 (CNC/CZS1) and 1.4%Ru/Ce 0.4 Zr o.4 Sm 0.2 /γ-Al 2 O 3 (RuCZS2) were synthesized via impregnation of La-stabilizedγ-Al 2 O 3 with corresponding solutions followed by calcination at 800°C.ESR was conducted over the 0.25-0.5 mm catalyst fraction in a U-shaped tubular flowreactor at atmospheric pressure, 3300-50000 h –1 GHSV (0.07-1s contact time) and 300-800°C.Before testing the catalysts were reduced at 400°C in the flow of 10 % H 2 in N 2 and thenexposed to a feeding gas mixture (C 2 H 5 OH:Н 2 О:N 2 :=10:30-60:30-70%vol.). Three on-linegas chromatographs (GC) «LHM-8» were used for the analysis of reactants and products.Results and discussionEffect of the temperature and contact time on ESR. The testing of the catalysts in SRMshows that, at short contact times, the complete ethanol conversion over CNC/CZS1 wasobtained only at 800°C. For RuCZS2, it reaches 100% at temperatures 400-700°C at allcontact times in the feed C 2 H 5 OH:Н 2 О:N 2 =10:40:60% but concentrations and selectivity of152