Metodologia analítica para quantificar o teor de biodiesel na mistura biodiesel: diesel utilizando espectroscopia na região do infravermelho

Guarieiro, Lílian Lefol Nani; Pinto, Ângelo C.; Aguiar, Paula Fernandes de; Ribeiro, Núbia Moura

doi:10.1590/s0100-40422008000200041

Cited by 40 publications

(29 citation statements)

References 5 publications

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“…Spectroscopy is not only selective but also allows quantifying the amount of biodiesel in the mixture with concentrations as low as 0.1% (Guarieiro et al, 2008). Abbas et al (2008) concluded that the FTIR analysis indicates stages of degradation and structural modifications of compounds.…”

Section: Resultsmentioning

confidence: 99%

Growth of Paecilomyces variotii in B0 (diesel), B100 (biodiesel) and B7 (blend), degradation and molecular detection

et al. 2015

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The introduction of biodiesel to diesel may allow the fuel to be more susceptible to microorganism growth, especially during incorrect storage. To evaluate the effect of adding biodiesel in pure diesel on the growth of Paecilomyces variotii, microcosms containing pure diesel (B0), blend diesel/biodiesel (B7) and pure biodiesel (B100) were used. In microcosm with minimal mineral medium and B0, B7 or B100, after 60 days, the biomass (dry weight) formed at interface oil-water in B7 and B100 was significantly higher when compared to that of B0. Infrared analysis showed reduction of the carbonile fraction in B7 and B100 suggesting formation of intermediate compounds in B7. To monitor possible contamination of fuel storage tank by P. variotii samples were collected and analysed by specific-PCR assay for detection of P. variotii spores in the aqueous phase. This method was able to detect a minimum of 10 3 spores ml -1 , corresponding to 0.0144 ng µl -1 of DNA. Specificity was tested against Aspergillus fumigatus and Pseudallescheria boydii.Keywords: biodiesel, Paecilomyces variotii, deteriogenic, biodegradation, infrared spectroscopy, PCR.Crescimento de Paecilomyces variotii em B0 (diesel), B100 (biodiesel) e B7 (mistura), degradação e detecção molecular Resumo A introdução de biodiesel ao diesel pode permitir que o combustível se torne mais suscetível ao crescimento de microorganismos, especialmente durante o armazenamento incorreto. Para analisar o efeito da adição de biodiesel em diesel puro no crescimento de Paecilomyces variotii, avaliou-se seu desenvolvimento em microcosmos contendo diesel puro (B0), mistura diesel/biodiesel (B7) e biodiesel puro (B100). Em microcosmos com meio mineral mínimo e B0, B7 ou B100, após 60 dias, a biomassa (peso seco) formada na interface óleo-agua com B7 e B100 foi significativamente maior quando comparada com a de B0. A análise de infravermelho mostrou redução da fração carbonila em B7 e B100, sugerindo a formação de compostos intermediários em B7. Para monitorar uma possível contaminação de tanque de armazenamento de combustível por P. variotii, amostras foram colhidas e analisadas por um teste de PCR específico para detecção de esporos deste fungo em fase aquosa. Este método foi capaz de detectar um mínimo de 10 3 esporos ml -1, correspondente a 0.0144 ng µl -1 de DNA. Especificidade foi testada contra Aspergillus fumigatus e Pseudallescheria boydii.Palavras-chave: biodiesel, Paecilomyces variotii, deteriogênico, biodegradação, espectroscopia de infravermelho, PCR.

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Section: Resultsmentioning

confidence: 99%

Growth of Paecilomyces variotii in B0 (diesel), B100 (biodiesel) and B7 (blend), degradation and molecular detection

et al. 2015

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“…Consequently, the methods were successfully employed to identify adulterated diesel fuels [118,119]. The most common application of vibrational spectroscopic methods to diesel blends, however, aimed at determining the amount of biodiesel [120][121][122][123][124]. In all these studies, absorption techniques were combined with multivariate data analysis.…”

Section: Blends With Biofuelsmentioning

confidence: 99%

Recent Advances in the Characterization of Gaseous and Liquid Fuels by Vibrational Spectroscopy

Kiefer

2015

Energies

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Most commercial gaseous and liquid fuels are mixtures of multiple chemical compounds. In recent years, these mixtures became even more complicated when the suppliers started to admix biofuels into the petrochemical basic fuels. As the properties of such mixtures can vary with composition, there is a need for reliable analytical technologies in order to ensure stable operation of devices such as internal combustion engines and gas turbines. Vibrational spectroscopic methods have proved their suitability for fuel characterization. Moreover, they have the potential to overcome existing limitations of established technologies, because they are fast and accurate, and they do not require sampling; hence they can be deployed as inline sensors. This article reviews the recent advances of vibrational spectroscopy in terms of infrared absorption (IR) and Raman spectroscopy in the context of fuel characterization. The focus of the paper lies on gaseous and liquid fuels, which are dominant in the transportation sector and in the distributed generation of power. On top of an introduction to the physical principles and review of the literature, the techniques are critically discussed and compared with each other.

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“…169 The proposed model was suitable to identify unconformities in relation to biodiesel content, contamination of biodiesel with vegetal oil and of diesel with naphtha. Guarieiro et al 170 developed a procedure based on mid-infrared spectroscopy (C=O bands at 1750 and 1735 cm -1 ) to estimate the biodiesel content in commercial blends, with a detection limit of 0.1% and relative error lower than 10%.…”

Section: Fuelsmentioning

confidence: 99%

Analytical chemistry in Brazil: healthy and growing

Rocha

Pereira-Filho²,

Nóbrega³

2009

J. Braz. Chem. Soc.

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A química brasileira está crescendo rapidamente, sendo um dos principais alicerces para o contínuo desenvolvimento do país. Inspirados no 15º Encontro Nacional de Química Analítica, ENQA, com um número recorde de participantes e comunicações, decidiu-se revisar os recentes desenvolvimentos em química analítica no Brasil. Foram escolhidas as mesmas áreas de aplicação adotadas para a organização temática do ENQA e selecionados artigos publicados por autores brasileiros em 7 periódicos de ampla penetração na área. Os dois periódicos científicos editados pela Sociedade Brasileira de Química também foram pesquisados. Esta revisão não é exaustiva, porém os trabalhos selecionados após 2008 mostram uma significativa visão geral da área. Pode-se concluir que a química analítica brasileira está saudável, em crescimento e certamente atenderá as demandas do país como uma potência emergida.Chemical sciences in Brazil are growing fast and being one of the main supports for the continuous development of the country. Inspired on the 15 th Brazilian Meeting on Analytical Chemistry, ENQA, with a record number of participants and communications, we have decided to review recent developments in analytical chemistry in Brazil. We have chosen the same application areas used for the thematic organization of the ENQA and have searched papers published by Brazilian authors in 7 major and general journals in analytical chemistry. The two scientific journals published by the Brazilian Chemical Society were also searched. This review is not comprehensive, but the selected papers published after 2008 shown an impressive overview of the area. We may conclude that analytical chemistry is healthy and growing in Brazilian scenario and certainly will attend the demands of Brazil as an emerged power.

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Metodologia analítica para quantificar o teor de biodiesel na mistura biodiesel: diesel utilizando espectroscopia na região do infravermelho

Cited by 40 publications

References 5 publications

Growth of Paecilomyces variotii in B0 (diesel), B100 (biodiesel) and B7 (blend), degradation and molecular detection

Growth of Paecilomyces variotii in B0 (diesel), B100 (biodiesel) and B7 (blend), degradation and molecular detection

Recent Advances in the Characterization of Gaseous and Liquid Fuels by Vibrational Spectroscopy

Analytical chemistry in Brazil: healthy and growing

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