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Universidade Estadual de Campinas

1. Chagas, Ismael Pereira. Desenvolvimento de um fotometro portatil NIR para determinação do teor de agua no alcool combustivel e do teor de etanol na gasolina: Development of a portable near infrared photometer for determination of quality parameters of gasoline and alcohol fuel.

Degree: 2006, Universidade Estadual de Campinas

Abstract: In this work a portable Near Infrared Photometer to determine the quantity of water in alcohol fuel and the quantity of ethanol in gasoline was developed. Initially, several spectroscopy analysis using a comercial spectrophotometer was made to select the best wavelenghts to determine those fuel quality parameters. The wavelengths of 1480 nm and 1920 nm were selected after preliminary study. The instrument was evaluated using two types of detectors: a PbS photoresistive detector and a InGaAs photodiode. The detector with best performance was the InGaAs photodiode. Different prototypes were built using a interference filter working in 1480 nm and path length with 2 mm and 5 mm. With the 2 mm path length was used a 6 watt tungsten lamp as radiation source and with 5 mm path length was used a 20 watts tungten lamp. This interference filter can be used to determine water in alcohol fuel and ethanol in gasoline without any changes in the instrument. The final version of the prototype showing the best results for both determinations uses a cilindric cell with 5 mm diameter and can be employed for flow or batch measurements, radiation source of a 20 watts tungsten lamp pulsed at 25 Hz and a lens to focus the infrared radiation into the detector. The output transducers of the instrument was a PIC microcontroller with a liquid crystral display and light emission diodes (LEDs) green and red. The instrument was tested using comercial fuel alcohol and gasoline samples. In the determination of water in alcohol it was obtained a linear response in the concentration range from 98 to 88 % (m/m) and in gasoline, it was 20 % to 30 %(v/v). Thirty alcohol samples were analysed showing a standard error of 3,6 % while for the gasoline, a standard error of 3,0% for a total of 40 samples analysed was found. Considering the tolerance of 4%, recommended by the National Pretoleum Agency (ANP), the instrument can classify normal and adultered samples with confidence of 100% Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Rohwedder, Jarbas José Rodrigues, 1959- (advisor), Universidade Estadual de Campinas. Instituto de Química (institution), Programa de Pós-Graduação em Química (nameofprogram), Reis, Boaventura Freire dos (committee member), Miranda, Carlos Eduardo Saraiva (committee member), Silva, Jose Alberto Fracass da (committee member), Poppi, Ronei Jesus (committee member).

Subjects/Keywords: Instrumentação; Infravermelho próximo; Gasolina; lcool como combustivel; Instrumentation; Near infrared.; Gasoline; Alcohol as fuel

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Chagas, I. P. (2006). Desenvolvimento de um fotometro portatil NIR para determinação do teor de agua no alcool combustivel e do teor de etanol na gasolina: Development of a portable near infrared photometer for determination of quality parameters of gasoline and alcohol fuel. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/250572

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Chagas, Ismael Pereira. “Desenvolvimento de um fotometro portatil NIR para determinação do teor de agua no alcool combustivel e do teor de etanol na gasolina: Development of a portable near infrared photometer for determination of quality parameters of gasoline and alcohol fuel.” 2006. Thesis, Universidade Estadual de Campinas. Accessed October 30, 2020. http://repositorio.unicamp.br/jspui/handle/REPOSIP/250572.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Chagas, Ismael Pereira. “Desenvolvimento de um fotometro portatil NIR para determinação do teor de agua no alcool combustivel e do teor de etanol na gasolina: Development of a portable near infrared photometer for determination of quality parameters of gasoline and alcohol fuel.” 2006. Web. 30 Oct 2020.

Vancouver:

Chagas IP. Desenvolvimento de um fotometro portatil NIR para determinação do teor de agua no alcool combustivel e do teor de etanol na gasolina: Development of a portable near infrared photometer for determination of quality parameters of gasoline and alcohol fuel. [Internet] [Thesis]. Universidade Estadual de Campinas; 2006. [cited 2020 Oct 30]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/250572.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chagas IP. Desenvolvimento de um fotometro portatil NIR para determinação do teor de agua no alcool combustivel e do teor de etanol na gasolina: Development of a portable near infrared photometer for determination of quality parameters of gasoline and alcohol fuel. [Thesis]. Universidade Estadual de Campinas; 2006. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/250572

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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