Produção de biodiesel via transesterificação etílica com zeólitas básicas

Ghesti, Grace Ferreira; Macedo, Julio L. de; Dias, José A.; Dias, Sílvia C.L.

doi:10.1590/s0100-40422012000100022

Cited by 12 publications

(10 citation statements)

References 28 publications

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“…Com isso os catalisadores heterogêneos têm tido grande interesse das áreas científicas e industriais, pois oferecem vantagens como: fácil manuseio, recuperação e reutilização do catalisador, além de gerar menos resíduos (Soldi et al 2009;Ghesti, et al 2012).…”

Section: Introductionunclassified

APPLICATION OF THE CATALYST KI-MCM-41 IN THE OTERTIC OIL ESTERIFICATION REACTION (licania rigida Benth)

Pereira¹,

Silva²,

Matias³

et al. 2019

PTQ

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The Biodiesel is renewable fuel constituted for monoalkyls esters of fatty acids, can be produced by vegetable oil, animal fat and even residual oils from food industry. However the most used oleaginous to produce is soy, being necessary search for another king of oleaginous that do not enter the food market competition. A research about oleaginous is necessary to evaluate the physical-chemical properties. The Oiticica Tree is a typical species from riparian forests of the caatinga. Its fruit is composed 70 % for a nut and content between 60 and 63% of oil in its chemical composition, presently mainly the licorice fatty acids (70 up to 80%) and linolenic (10 up to 12%). This study analyzed the physicochemical properties of the extracted oil from Oiticica Tree green nut in comparison with extracted oil from mature nuts in available studies. The Biodiesel from green nut was produced using as catalysts MCM-41 impregnated with potassium iodide (KI) in the concentrations 2,5 and 7,5%. The impregnation with KI slightly disorganized the structure and altered the textural properties of MCM-41 increasing the pore diameter and reducing pore volume and surface area, but the main typical peaks of MCM-41 were not destroyed. Before the application, the oil was hydrolyzed for the elimination of unsaponifiable materials after that a fatty acid esterification with different proportions of KI. The result was conversion of fatty acids preferably in acid esters, but also had the formation of materials of higher molar mass not identified in this study. In this way we can see that the oil from green seed in comparation with matures seed have different properties being necessary the pre-treatment for biodiesel reaction and the used catalysts provides different percentages of conversion to methyl esters.

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Section: Introductionunclassified

APPLICATION OF THE CATALYST KI-MCM-41 IN THE OTERTIC OIL ESTERIFICATION REACTION (licania rigida Benth)

Pereira¹,

Silva²,

Matias³

et al. 2019

PTQ

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“…Furthermore, they have higher comparative reaction yields and allows the use of lower temperatures during the transesterification process due to favorable kinetic of reaction . Despite the advantages of basic homogeneous catalysis, the undesirable formation of soap can occur if the oil has a high content of free fatty acids, thus requiring more steps for the purification of the biodiesel, which affects the reaction yields …”

Section: Introductionmentioning

confidence: 99%

“…There are several reports which describe the use of heterogeneous catalysis in transesterification reactions, such as ionic resin (Amberlyst‐15), oxides (SnO, MgO, ZnO), supported oxides (WO 3 /ZrO 2 /Al 2 O 3 , KNO 3 /Al 2 O 3 ), sulfated oxides, mesoporous materials, zeolites (NaOx/NaX, ETS‐10), and some even composed of tin organometallic complexes ,. The synthesis and application of mixed oxides are also frequently reported, particularly those that facilitate the application of bland reaction conditions such as temperature and pressure, which may be more viable for industrial use …”

Section: Introductionmentioning

confidence: 99%

The Effect of Catalysis on the Parameters of the Oxidation Reaction of Biodiesel

et al. 2017

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Most commercial biodiesel is produced with homogeneous basic catalyst however, environmental and economically, the use of heterogeneous catalysis is potentially advantageous since they can be reused. This work aimed to evaluate the influence of homogeneous and heterogeneous catalysis on the oxidative stability of biodiesel by the determination of the kinetic and thermodynamic parameters of the oxidation reactions. The catalyst produced with a mixture of MgO and KOH (HetA) led to the production of biodiesel with the highest reaction yield, ester content and oxidative stability. Among the oxidation reaction parameters evaluated, the catalyst HetA and sodium methoxide showed the best results in terms of activation energy and activation enthalpy values. Both catalysts produced biodiesel with good results in terms of oxidative stability, though the HetA catalyst stands out for presenting the best results and underlines the advantages of employing a heterogeneous process.

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“…Por tais motivos vêm se procurando formas mais limpas, seguras, rápidas e eficientes para produção de biodiesel. Com isso os catalisadores heterogêneos têm atraído um grande interesse das áreas científicas e industriais, pois oferecem vantagens como: fácil manuseio, recuperação e reutilização do catalisador, além de gerar menos resíduos (SOLDI et al, 2009;GHESTI, 2012).…”

Section: Introductionunclassified

Aplicação do catalisador KI-MCM-41 na reação de esterificação do óleo de oiticica (licania rigida benth).

Pereira¹,

Silva²,

Matias³

et al. 2015

Anais Do 5º Encontro Regional De Química &Amp; 4º Encontro Nacional De Química

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ResumoA Oiticica é uma espécie típica de matas ciliares da caatinga verdadeira. Sua amêndoa constitui cerca de 70 % do fruto e contém de 60 a 63 % de óleo que em sua composição química, apresenta, principalmente, os ácidos graxos licânico (70 a 80%) e o linolênico (10 a 12%). O objetivo do presente trabalho foi produzir biodiesel através da hidrolise do óleo e esterificação do ácido graxo respectivamente. Procurando formas mais limpas, seguras, rápidas e eficientes para produção de biodiesel foi utilizado a catalise heterogênea, usando iodeto de potássio suportado na peneira molecular MCM-41 em diferentes proporções, apesar de desorganizado, a estrutura do material não foi destruída, sendo propicia para as reações. O trabalho avaliou as propriedades físico-químicas do óleo de oiticica extraído da semente verde comparando-as com as de semente madura. A fim de obter um biodiesel mais puro foi realizada uma hidrolise no óleo com duração de 3h, com todos os resultados foi possível observar que com a hidrolise é possível eliminar os materiais insaponificáveis e ácidos graxos livres existentes no óleo bruto, deixando o material mais adequado e mais limpo para futuras conversões a biodiesel. Posteriormente a hidrolise seguiu a esterificação do ácido graxo no tempo de 6h. Com todos os materiais hidrolisados e esterificados, as caracterizações realizadas no biodiesel foram índice de acidez e índice de iodo nos seguintes materiais: óleo bruto, ácido graxo pós-hidrolisado e KI-MCM-41(2,5%; 7,5%). Com a impregnação do KI ao MCM-41 foi observado que a esterificação não ocorre de forma satisfatória e que as cadeias dos ácidos graxos aumentam, ou seja, ocorre dimerização, efeito que depende da concentração de KI no catalisador e aumenta com o aumento deste.Palavra Chave: Oiticica, semente verde, biodiesel, catalise heterogênia, MCM-41

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Produção de biodiesel via transesterificação etílica com zeólitas básicas

Cited by 12 publications

References 28 publications

APPLICATION OF THE CATALYST KI-MCM-41 IN THE OTERTIC OIL ESTERIFICATION REACTION (licania rigida Benth)

APPLICATION OF THE CATALYST KI-MCM-41 IN THE OTERTIC OIL ESTERIFICATION REACTION (licania rigida Benth)

The Effect of Catalysis on the Parameters of the Oxidation Reaction of Biodiesel

Aplicação do catalisador KI-MCM-41 na reação de esterificação do óleo de oiticica (licania rigida benth).

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