JORGE MOREIRA VAZ
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Artigo IPEN-doc 23088 Production of biochar, bio-oil and synthesis gas from cashew nut shell by slow pyrolysis2017 - MOREIRA, RENATA; ORSINI, ROSELY dos R.; VAZ, JORGE M.; PENTEADO, JOSE C.; SPINACE, ESTEVAM V.Cashew nut shell waste from northeast region of Brazil was characterized and slow pyrolyzed in a simple batch type reactor heated externally by liquefied petroleum gas as fuel. The experiments were performed using nitrogen or air as carrier gases. The properties of biochar, bio-oil and gases products were investigated and potential applications were proposed. Cashew nut shell showed a high heating value of 20.7 MJ kg(-1) that is among the highest found for different types of biomass. Pyrolysis under nitrogen flow showed a yield of solid, liquid and gas products of about 30, 40 and 30 wt%, respectively. Under air flow an increase of gas phase (46 wt%) was observed with a decrease in the production of biochar and, mainly bio-oil. The biochars have high contents of carbon (70-75 wt%) and high heating values in the range of 25-28 MJ kg(-1) presenting suitable properties for use as energy source. Biochars also contain significant quantities of K and minor amounts of Mg, Ca, Cu, Zn and Fe showing potential as fertilizer. The bio-oils showed high heating values of about 32 MJ kg(-1) and are not suitable for use in pure form, but can be used in mixtures with Diesel (42.5 MJ kg(-1)). The gas phase revealed the predominance of CO2 and CO at temperatures lower than 400 degrees C and, above this temperature, there was a preferential formation of H-2 resulting in synthesis gas with different compositions that could be burned to supply heat for the pyrolysis process and/or to produce organic chemicals.Resumo IPEN-doc 08386 Partial hydrogenation of benzene to cyclohexene with ruthenium supported catalyst2001 - SPINACE, E.V.; VAZ, J.M.; PENTEADO, J.C.P.Resumo IPEN-doc 06690 Avaliacao do processo de cleanup de PCBs coplanares e planares empregando extracao em fase solida1999 - PENTEADO, J.C.P.; PRADA, S.M.; VAZ, J.M.; ROSSI, M.V.Artigo IPEN-doc 08456 Estudo da hidrogenacao parcial de benzeno a cicloexeno catalisada por Ru/SiOsub(2)2001 - SPINACE, E.V.; VAZ, J.M.; PENTEADO, J.C.P.Artigo IPEN-doc 08279 O legado das bifenilas policloradas (PCBs)2001 - PENTEADO, J.C.P.; VAZ, J.M.