One-step production of biodiesel from oils with high acid value by activated Mg–Al hydrotalcite nanoparticles

Wang, Yitong; Fang, Zhen; Zhang, Fan; Xue, Bao-jin

doi:10.1016/j.biortech.2015.06.059

Cited by 54 publications

(10 citation statements)

References 27 publications

(10 reference statements)

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“…Carbon dioxide with basic sites on oxide forms several complexes, (pseudo)carbonates, which differ in stability. [37][38][39] The least stable complexes, which are desorbed on the temperature ramp first, are usually assigned to bicarbonates being formed on weak basic sites represented by OH − groups. Medium stable complexes are bidentate carbonates (chelating and bridged), formed on highly heterogeneous Me n+ -O 2− pairs.…”

Section: Acido-basic Characteristicsmentioning

confidence: 99%

Pyroaurite‐based MgFe mixed oxides and their activity in aldol condensation of furfural with acetone: effect of oxide composition

Kocík

Frolich

Perková

et al. 2018

J of Chemical Tech & Biotech

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Background Pyroaurite‐based MgFe oxides with varying Mg:Fe ratio were studied. The structural and acido‐basic properties were examined by number of experimental techniques. The oxide properties were correlated with the catalytic activity in aldol condensation of furfural with acetone. Results Well‐developed mesoporous structure was detected for all oxides. Peculiar continuous increase of concentration of basic sites and population of unsaturated strong basic O2− sites was observed with the rising amount of magnesium in the MgFe oxide matrix. A relatively higher concentration of Lewis acid Men+ sites was shown for low Mg:Fe ratios. Unambiguous correlation between conversion of furfural and the density of strong basic sites was proved by combined catalytic and statistical analysis. The contribution of other basic sites was found significantly less important. The impact of both acid and basic sites on the composition of reaction products was discussed. Conclusions MgFe oxides revealed good catalytic performance in the aldol condensation of furfural with acetone where samples with a high Mg:Fe ratio were significantly more basic and had relatively enhanced furfural conversion (nominal Mg:Fe ratio 10; furfural conversion 88% and selectivity to F2Ac 34%; reaction conditions: batch reactor; 50 °C; acetone/furfural = 10 mol L–1). © 2018 Society of Chemical Industry

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Section: Acido-basic Characteristicsmentioning

confidence: 99%

Pyroaurite‐based MgFe mixed oxides and their activity in aldol condensation of furfural with acetone: effect of oxide composition

Kocík

Frolich

Perková

et al. 2018

J of Chemical Tech & Biotech

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“…Estudos envolvendo os HDLs conforme sintetizados [76][77][78][79][80] e seus óxidos nanoestruturados são bastante frequentes na literatura. Porém, na maioria dos casos, os artigos descrevem a sua atividade catalítica sem mostrar a caracterização completa dos materiais recuperados após um ou mais ciclos de reação.…”

Section: Catalisadores Lamelaresunclassified

Biodiesel: Raw Materials, Production Technologies and Fuel Properties

Ramos

2017

Rev. Virtual Quim.

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The entire biodiesel production chain developed tremendously in regions all over the world and this biofuel has established itself as one of the main alternatives to replace petroleumderived fuels. Several studies have already demonstrated its compatibility with diesel oil and the international standards have evolved to ensure safety and satisfaction to the end-users. Although already losing priority in stronger economies such as United States, Germany and France, this production chain is still expanding considerably in emerging economies such as Brazil, where it has been established as a project of great scientific, technological, political and economic interests. In this article, important aspects of the biodiesel production and use are revised in detail, particularly in relation to the availability of suitable raw materials in large scale as well as to the chemistry involved in the technologies available to date for its conversion to biofuels that are fully compatible with diesel fuel applications.

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“…Porém o processo é realizado em um reator de alta pressão em auto-clave. (WANG et al, 2015) O presente projeto diz respeito a simultaneidade da extração e produção de biodiesel, que promove maior seletividade e qualidade do material graxo, pois utiliza-se apenas metanol/etanol como solvente de extração, já o utilizando simultaneamente na reação de transesterificação/esterificação. Além disto, a composição da matéria prima pode ser heterogênea, não precisando de um processo anterior de tratamento e a matéria prima não entra em contato direto com a reação geradora de biodiesel, sendo assim facilmente separada e não precisando de um tratamento para a retirada do resíduo e posteriormente para o reuso do álcool e do catalisador.…”

Section: Análise Dos Documentos Científicosunclassified

Estudo Prospectivo Sobre Processo De Extração De Material Graxo De Resíduos Agroindustriais Com Produção Simultânea De Biodiesel

Guimarães¹,

Evaristo²,

Lima³

et al. 2017

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RESUMOO biodiesel é um biocombustível importante para a matriz energética nacional é produzido de diferentes fontes oleaginosas, desempenhando papel importante na produção final do biocombustível. Diante de sua cadeia produtiva e da importância de métodos mais sustentáveis, realizou-se um estudo prospectivo sobre o processo simultâneo de produção de biodiesel visando à condensação das etapas de produção via simultaneidade de extração e respectiva conversão a partir de resíduos agroindustriais oleaginosos. Além disso, tem-se como objeto de estudo a utilização de catálise heterogênea ao sistema, agregando facilidades na separação do produto e do meio catalítico. Neste nicho de pesquisa e desenvolvimento de métodos alternativos para o setor do biodiesel encontram-se poucas patentes e artigos, sendo em sua maioria evidenciados processos em escala laboratorial. Sendo assim, tal tecnologia merece atenção, investimento e desenvolvimento para seu escalonamento, tendo em vista agregar diversos benefícios ao setor, desde a matéria-prima até o processo e distribuição.Palavras-chave: Biodiesel. Resíduos Agroindustriais. Extração simultânea. PROSPECTIVE STUDY ON THE PROCESS OF EXTRACTION OF AGRICULTURAL WASTE GRAIN MATERIAL WITH SIMULTANEOUS BIODIESEL PRODUCTION ABSTRACTBiodiesel is an important biofuel for the national energy matrix is produced from different oil sources, playing an important role in the final production of biofuel. In view of its production chain and the importance of more sustainable methods, a prospective study was carried out on the simultaneous production process of biodiesel, aiming at the condensation of the production stages through the simultaneity of extraction and respective conversion from agro-industrial oleaginous residues. In addition, the object of study is the use of heterogeneous catalysis to the system, adding facilities in the separation of the product and the catalytic medium. In this niche of research and development of alternative methods for the biodiesel sector are few patents and articles, being mostly evidenced processes in laboratory scale. Therefore, such technology deserves attention, investment and development for its scheduling, aiming to add several benefits to the sector, from the raw material to the process and distribution.

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One-step production of biodiesel from oils with high acid value by activated Mg–Al hydrotalcite nanoparticles

Cited by 54 publications

References 27 publications

Pyroaurite‐based MgFe mixed oxides and their activity in aldol condensation of furfural with acetone: effect of oxide composition

Pyroaurite‐based MgFe mixed oxides and their activity in aldol condensation of furfural with acetone: effect of oxide composition

Biodiesel: Raw Materials, Production Technologies and Fuel Properties

Estudo Prospectivo Sobre Processo De Extração De Material Graxo De Resíduos Agroindustriais Com Produção Simultânea De Biodiesel

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