MOREIRA, RENATAORSINI, ROSELY dos R.VAZ, JORGE M.PENTEADO, JOSE C.SPINACE, ESTEVAM V.2017-09-262017-09-262017MOREIRA, RENATA; ORSINI, ROSELY dos R.; VAZ, JORGE M.; PENTEADO, JOSE C.; SPINACE, ESTEVAM V. Production of biochar, bio-oil and synthesis gas from cashew nut shell by slow pyrolysis. <b>Waste and Biomass Valorization</b>, v. 8, n. 1, p. 217-224, 2017. DOI: <a href="https://dx.doi.org/10.1007/s12649-016-9569-2">10.1007/s12649-016-9569-2</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/27791.1877-2641http://repositorio.ipen.br/handle/123456789/27791Cashew 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.217-224openAccesscoalnutssynthesispyrolysisagricultural wastesmethanesynthesis gasArtigo de periódico1810.1007/s12649-016-9569-2https://orcid.org/0000-0002-7011-826145.66