Avaliação da acidez de bio-óleos obtidos pela pirólise de óleos vegetais pós-consumo

• Autor(a) principal: Britto, Fabiano de Bonis de
• Data de Publicação: 2012
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/15751
• topic: Environment; vegetable oil; pyrolysis; Meio ambiente; oleo vegetal; pirólise; CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ANALITICA::ANALISE DE TRACOS E QUIMICA AMBIENTAL

The irregular disposal of post-consumer vegetable oil direcly into the sewage system has caused big problems for the environment. Currently, this problem has intensified due to increased production and consumption of oil, wich consequently increases the uncontrolled dump. In the present study was performed to obtain the bio-oil from the thermal pyrolysis in nitrogen atmosphere at 400ºC for 20 minutes of post-consumer vegetable oil, oleaginous from the following: soybean, corn, sunflower and canola. The non-catalytic pyrolysis generation had a mean of 40 to 50% of a bio-oil, high acid valuer, 81,8 mg NaOH/g. In catalytic pyrolysis, treated clays K10 was demonstrated that more efficient catalyst for producing a bio-oil of lower acid value. The concentration of "optimum" in the catalyst was 5%(w/w), generating 48 ± 2% of a bio-oil with acid value of 43.8 mg NaOH/g. The characterization of the pyrolytic liquid obtained was performed by spectrophotometry in the infrared (FTIR) and gas chromatography coupled to mass spectrometry (GC/MS) that demonstrated that triolein, the triglyceride of oleic acid, was broken generating hexadecanoic acid, octadecyl ester and oleic acid, eicosyl ester, esters of their fatty acid