Diffusion and production of carbon dioxide in bulk corn at various temperatures and moisture content

Haibo Huang, Mary-Grace Danao, Kent D Rausch, Vijay Singh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The effective diffusion coefficient of carbon dioxide (CO2) through bulk corn was determined at various temperatures (10, 20 and 30°C) and grain moisture contents (14.0, 18.8 and 22.2% w.b.). The diffusion coefficient measurements were conducted using a diffusion cell surrounded by a water jacket, which was used to control the bulk corn temperature in the diffusion cell. A source term (CO2 respiration rate) was introduced in the diffusion equation to account for CO2 production by corn during the diffusion process. Corn respiration rate increased when temperature and grain moisture content increased. As respiration rate increased, it had a larger effect on the diffusion pattern when measuring the effective CO 2 diffusion coefficient. The effective CO2 diffusion coefficients through bulk corn ranged between 3.10 × 10-6 and 3.93 × 10-6 m2/s, depending on temperature and moisture conditions. As temperature increased from 10 to 30°C, the effective CO2diffusion coefficient through bulk corn increased from 3.21 × 10-6 to 3.76 × 10-6 m2/s. As corn moisture content increased from 14.0 to 18.8% (w.b.), the effective CO 2 diffusion coefficient through bulk corn decreased from 3.59 × 10-6 to 3.39 × 10-6 m2/s, respectively. There was no difference observed in the effective CO2 diffusion coefficient when corn moisture content increased from 18.8 to 22.2%.

Original languageEnglish (US)
Title of host publicationAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2013, ASABE 2013
PublisherAmerican Society of Agricultural and Biological Engineers
Pages2012-2023
Number of pages12
ISBN (Print)9781627486651
StatePublished - Jan 1 2013
EventAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2013 - Kansas City, MO, United States
Duration: Jul 21 2013Jul 24 2013

Publication series

NameAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2013, ASABE 2013
Volume3

Other

OtherAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2013
CountryUnited States
CityKansas City, MO
Period7/21/137/24/13

Keywords

  • Carbon dioxide
  • Corn
  • Effective diffusion coefficient
  • Respiration rate
  • Storage

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Bioengineering

Fingerprint Dive into the research topics of 'Diffusion and production of carbon dioxide in bulk corn at various temperatures and moisture content'. Together they form a unique fingerprint.

Cite this