Journal
BIORESOURCE TECHNOLOGY
Volume 276, Issue -, Pages 1-7Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.12.092
Keywords
Syngas fermentation; Mass transfer; Hollow fiber reactor (HFR); Carbon monoxide; Hydrogen; Biofuels
Funding
- Sun Grant Program - South Central Center [DOTS59-07-G-00053]
- USDA-NIFA Project [OKL02758]
- Oklahoma Agricultural Experiment Station
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Syngas fermentation for producing biofuels and other products suffers from mass transfer limitations due to low CO and H-2 solubility in liquid medium. Therefore, it is critical to characterize mass transfer rates of these gases to guide bioreactor design and optimization. This work presents a novel technique to measure the volumetric mass transfer coefficients (kia) for H-2 and CO using gas chromatography in a non-porous hollow fiber reactor (HFR). The largest measured kia for H-2 and CO were 840 and 420 h(-1), respectively. A model was developed to predict kia for H-2 and CO that agreed well with experimental data. This study is the first to measure, compare, and model both H-2 and CO mass transfer coefficients in an HFR. Based on model predictions, HFRs have the potential to be a reactor of choice for syngas fermentation as a result of high mass transfer that can support high cell densities.
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