Magnetic acid catalyst produced from acai seeds and red mud for biofuel production

Araujo, Rayanne O.; Santos, Vanuza O.; Ribeiro, Flaviana C. P.; Chaar, Jamal da Silva; Pereira, Anderson Mathias; Falção, Newton Paulo de Souza; Souza, Luiz K.C. de

doi:10.1016/j.enconman.2020.113636

Cited by 34 publications

(14 citation statements)

References 47 publications

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“…A caracterização como óleo graxo pode ser observada na banda que se encontra na região de 1.760 a 1.620 cm-1. Esta região é característica do estiramento C=O, onde a região em torno de 1.740 cm-1 corresponde aos estiramentos C=O de grupos éster (Zhang et al, 2021) e 1.710 cm-1 corresponde aos estiramentos C=O de grupos ácido carboxílico (Araujo et al, 2021). Observa-se que existe a presença dos dois grupos, ou seja, os ácidos graxos presentes no óleo encontram-se na sua forma glicerídica, entretanto existe a presença de considerável quantidade de ácidos graxos livres, conforme indicado pelo alto valor do índice de acidez do óleo extraído.…”

Section: Resultsunclassified

Extração e análise de propriedades físico-químicas do óleo de açaí (Euterpe oleracea Mart.)

Castro

Costa

et al. 2021

RSD

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O açaizeiro (Euterpe oleracea Mart.) é uma palmeira nativa da Amazônia, que ocorre em grandes extensões no estuário amazônico. Durante o processo de conservação e extração de óleos, fatores como umidade, temperatura, enzimas lipídicas e presença de luz, podem afetar o perfil lipídico, favorecendo a hidrólise e liberando ácidos graxos. A presença de ácidos graxos influencia na qualidade dos óleos. Este trabalho teve como objetivo a extração do óleo de açaí por solvente orgânico e a análise de alguns parâmetros físico-químicos como: densidade, níveis de acidez, e perfil glicídico. Para a extração foram utilizados o aparelho soxhlet e o hexano como solvente. A extração do óleo de açaí não apresentou bom rendimento, devido à escolha de se utilizar os frutos inteiros que tem grandes quantidades de fibras envoltas nas sementes. A densidade foi analisada através do densímetro 35n da ANTON PAAR, a acidez foi medida através de titulação por KOH e para o perfil glicídico o óleo foi submetido a análise de espectroscopia no infravermelho por transformada de Fourier (FTIR), utilizando o aparelho IR Prestige-21 da Shimadzu. A densidade apresentou-se um pouco baixa. O nível de acidez apresentou valores um pouco elevados, indicando a formação de ácidos graxos, no perfil glicerídeo foi possível observar a presença de ácidos graxos livres, o que justifica a acidez.

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Section: Resultsunclassified

Extração e análise de propriedades físico-químicas do óleo de açaí (Euterpe oleracea Mart.)

Castro

Costa

et al. 2021

RSD

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“…Throughout the 21st century, anthropogenic intervention has increased environmental damage and thus, changing production and consumption patterns to minimize resource depletion has become a priority, making the linear model based on extracting materials, transforming them into products, and then discarding them as waste, without any reuse initiative, unfeasible (Arauzo-Carod et al,2022;Bourdin et al,2022). In a circular system, the order is to rely less on pure raw materials, prioritizing inputs with more durable properties, reuse materials, and recycle waste (Accorsi et al,2020).…”

Section: Introductionmentioning

confidence: 99%

“…The transformations required to move from linear economy to CE also demand a new regional and urban governance (Arauzo-Carod et al, 2022;Obersteg et al, 2019) and consequently promote a balance Capítulo 49 of business expectations with the public interest. With regard to the public interest, public institutions can be employed of legislation and policy, supporting infrastructure, and social awareness.…”

Section: Introductionmentioning

confidence: 99%

Biotechnological potential of açaí (Euterpe oleracea Mart.) seeds for biofuel production

Ribeiro¹,

Gonçalves²

2023

Collection of International Topics in Health Science- V1

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The economic progress associated with the consumption habits of society, in general, has presented increasing generation and accumulation of solid waste. This is because, in most cases, there is no proper reuse of waste in the production process. Given this scenario, the concept of Circular Economy (CE) arises, seeking to transform the linear production model, based on the concept of extract, produce, consume and dispose, into a circular model, in which materials must return to the production cycle (Siqueira & Moraes, 2009).

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“…The application of heterogenous magnetic catalysts from biomass is an attention for research. It was noted that the preparation of magnetic acid catalysts involves multiple preparation steps and uses expensive chemicals, which consequently create problems in the catalyst synthesis and prevent largescale production [18]. Thus, introducing environmentally safe support materials in catalyst synthesis could widen the applicability of biomass.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Magnetic Catalyst Derived from Oil Palm Empty Fruit Bunch for Esterification of Oleic Acid: An Optimization Study

Krishnan

Pua

Tan

2021

Bull. Chem. React. Eng. Catal.

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Biomass, renewable, abundantly available and a good source of energy. The conversion of biomass waste into valuable products has received wide attention. In this study, an empty fruit bunch (oil palm EFB) supported magnetic acid catalyst for esterification reaction was successfully prepared via the one-step impregnation process. The new magnetic catalyst achieved a higher surface area of 188.87 m2/g with a total acidity of 2.4 mmol/g and identified iron oxide as g-Fe2O3. The magnetization value of 24.97 emu/g demonstrated that the superparamagnetic catalyst could be easily recovered and separated after the reaction using an external magnet. The catalytic performance of oil palm EFB supported magnetic acid catalyst was examined by esterification of oleic acid. Esterification process parameters were optimized via Response Surface Methodology (RSM) optimization tool with Box-Behnken design (BBD). The following optimum parameters were determined: an amount of 9 wt% catalyst, molar ratio of methanol to oleic acid of 12:1, reaction time of 2 h and reaction temperature of 60 °C with a maximum conversion of 94.91% was achieved. The catalyst can be recycled up to five cycles with minimal loss in its activity. The oil palm waste-based magnetic acid catalyst indicates its potential replacement to the existing solid catalysts that are economical and environmentally friendly for the esterification process in biofuel applications. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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Magnetic acid catalyst produced from acai seeds and red mud for biofuel production

Cited by 34 publications

References 47 publications

Extração e análise de propriedades físico-químicas do óleo de açaí (Euterpe oleracea Mart.)

Extração e análise de propriedades físico-químicas do óleo de açaí (Euterpe oleracea Mart.)

Biotechnological potential of açaí (Euterpe oleracea Mart.) seeds for biofuel production

Synthesis of Magnetic Catalyst Derived from Oil Palm Empty Fruit Bunch for Esterification of Oleic Acid: An Optimization Study

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