Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia

OP-1-10REACTION BETWEEN CO 2 AND COKE: A COMPARISON OF THECOKE FROM CATALYTIC CRACKING OF BIO-OIL AND GASOILLuciana T. Santos 1 , Ana Paula S.S. Estevão 2 , Fabiana M. Santos 2 ,Leonardo F. Mello 3 , Yiu Lau Lam 3 and Marcelo M. Pereira 21 Nacional Agency of Petroleum, Av. Rio Branco, 65, CEP 20090004, RJ, BrazilFAX 55-21-2112-8389, ltsantos@anp.gov.br2 Federal University of Rio de Janeiro, CT,bloco A, 7º an., CEP 21941909, RJ, Brazil3 Cenpes - Petrobras, Av. Horácio Macedo 950, RJ, BrazilThe scenario of CO 2 emissions and the climatic changes are events highlightedin the world today [1]. The Fluid Catalytic Cracking Process (FCC) is a central pointof this problem [2]. It is one of the major individual sources of CO 2 emission in arefinery due to large amount of coke formed during cracking reactions. To processbiomass as alternative to fossil fuels can impact the energy transformation,furthermore will cause an increase in the amount of coke formed on the catalyst. So,CO production (an input for the chemical industry) and CO 2 sequestration can besimultaneously improved through the coke/CO 2 reaction [3]. The previously cokedcatalysts (in conventional gasoil and a bio-oil from sugarcane bagasse) wereregenerated under CO 2 flux. The reaction was accompanied on line by a MassSpectrometer and the catalysts were characterized by 13 C NMR, LECO, AA and BET.Independently of the nature of coke, the CO 2reacts in the presence of oxygen mainly at thebeginning of the reaction. Simultaneously with theconsumption of the label CO 2 (m/z=45), CO (m/z=29)is formed and coke is oxidized, Figure 1. The increaseof the temperature facilitates the CO (m/z=28)formation. Despite the differences on cokefunctionality, the same range of reaction temperaturewas observed, both in the presence of oxygen andCO 2 . The reaction kinetics was approximated by apseudo first order with respect to CO 2 obtaining anE app =87 kJ/mol to the reaction with gasoil. TheFigure1. MS profiles ofcatalysts oxidation at 800°C.calculation of the activation energy for the bio-oil is indevelopment.References:[1]. K. Caldeira, J.F. Kasting, Nature, 1993, 366, 251-253.[2]. J. Biswas, I.E. Maxwell, Applied Catalysis A: General, 1990, 63, 197-258.[3]. L.T. Santos et al, Applied Catalysis A: General, 2008, 336, 40–47.34