A mass transfer model of ethanol emission from thin layers of corn silage

Hamed M. El-Mashad, Ruihong Zhang, Sasha Hafner, Felipe Montes, Clarence Alan Rotz, Veronica Arteaga, Yongjing Zhao, Frank M. Mitloehner

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A mass transfer model was developed and validated to predict ethanol emission from thin layers of corn silage. The model was developed using experimental data collected from silage placed in a wind tunnel under different temperatures and air velocities. Data from the wind tunnel experiments were used to derive a multiple regression equation that related the overall mass transfer coefficient of ethanol to temperature and air velocity. Evaluation of the model was done using data collected from experiments conducted in a controlled environmental chamber. Ethanol emission was determined from the ventilation rate of the environmental chamber and ethanol concentration in the chamber exhaust over a 24 h period, measured using a photoacoustic gas analyzer. Ethanol concentration in the silage was also monitored throughout the duration of each experiment. Predicted ethanol emission rates were strongly correlated (R 2 = 0.94) with values measured in the environmental chamber. A high correlation (R 2 = 0.96) was also found between predicted and measured ethanol concentrations in the silage. The model was used to estimate ethanol emission rates from thin layers of lightly packed silage on a dairy farm in California. Model predictions indicate that most of the ethanol contained in the silage could be emitted in the first 10 h after exposing the silage to ambient air temperature (18°C to 35°C) and air velocity (0.1 to 2.0 m s -1).

Original languageEnglish (US)
Pages (from-to)1903-1909
Number of pages7
JournalTransactions of the ASABE
Volume53
Issue number6
StatePublished - Dec 3 2010

Fingerprint

Silage
silage
corn silage
mass transfer
Zea mays
ethanol
Ethanol
Mass transfer
maize
Environmental chambers
Air
wind tunnels
wind tunnel
air
Temperature
Wind tunnels
Photoacoustic effect
Dairies
ecological value
experiment

All Science Journal Classification (ASJC) codes

  • Forestry
  • Food Science
  • Biomedical Engineering
  • Agronomy and Crop Science
  • Soil Science

Cite this

El-Mashad, H. M., Zhang, R., Hafner, S., Montes, F., Rotz, C. A., Arteaga, V., ... Mitloehner, F. M. (2010). A mass transfer model of ethanol emission from thin layers of corn silage. Transactions of the ASABE, 53(6), 1903-1909.
El-Mashad, Hamed M. ; Zhang, Ruihong ; Hafner, Sasha ; Montes, Felipe ; Rotz, Clarence Alan ; Arteaga, Veronica ; Zhao, Yongjing ; Mitloehner, Frank M. / A mass transfer model of ethanol emission from thin layers of corn silage. In: Transactions of the ASABE. 2010 ; Vol. 53, No. 6. pp. 1903-1909.
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abstract = "A mass transfer model was developed and validated to predict ethanol emission from thin layers of corn silage. The model was developed using experimental data collected from silage placed in a wind tunnel under different temperatures and air velocities. Data from the wind tunnel experiments were used to derive a multiple regression equation that related the overall mass transfer coefficient of ethanol to temperature and air velocity. Evaluation of the model was done using data collected from experiments conducted in a controlled environmental chamber. Ethanol emission was determined from the ventilation rate of the environmental chamber and ethanol concentration in the chamber exhaust over a 24 h period, measured using a photoacoustic gas analyzer. Ethanol concentration in the silage was also monitored throughout the duration of each experiment. Predicted ethanol emission rates were strongly correlated (R 2 = 0.94) with values measured in the environmental chamber. A high correlation (R 2 = 0.96) was also found between predicted and measured ethanol concentrations in the silage. The model was used to estimate ethanol emission rates from thin layers of lightly packed silage on a dairy farm in California. Model predictions indicate that most of the ethanol contained in the silage could be emitted in the first 10 h after exposing the silage to ambient air temperature (18°C to 35°C) and air velocity (0.1 to 2.0 m s -1).",
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El-Mashad, HM, Zhang, R, Hafner, S, Montes, F, Rotz, CA, Arteaga, V, Zhao, Y & Mitloehner, FM 2010, 'A mass transfer model of ethanol emission from thin layers of corn silage', Transactions of the ASABE, vol. 53, no. 6, pp. 1903-1909.

A mass transfer model of ethanol emission from thin layers of corn silage. / El-Mashad, Hamed M.; Zhang, Ruihong; Hafner, Sasha; Montes, Felipe; Rotz, Clarence Alan; Arteaga, Veronica; Zhao, Yongjing; Mitloehner, Frank M.

In: Transactions of the ASABE, Vol. 53, No. 6, 03.12.2010, p. 1903-1909.

Research output: Contribution to journalArticle

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AU - El-Mashad, Hamed M.

AU - Zhang, Ruihong

AU - Hafner, Sasha

AU - Montes, Felipe

AU - Rotz, Clarence Alan

AU - Arteaga, Veronica

AU - Zhao, Yongjing

AU - Mitloehner, Frank M.

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El-Mashad HM, Zhang R, Hafner S, Montes F, Rotz CA, Arteaga V et al. A mass transfer model of ethanol emission from thin layers of corn silage. Transactions of the ASABE. 2010 Dec 3;53(6):1903-1909.