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Process parameters for operating 1-butanol gas stripping in a fermentor
Ying-Chen Liao1, Kuan-Ming Lu1, Si-Yu Li1
1Department of Chemical Engineering, National Chung Hsing University, Taichung 402, Taiwan.
Journal of Bioscience and Bioengineering
|June 3, 2014
Summary
Gas stripping performance for butanol removal is mainly influenced by gas flow rate. High gas superficial velocity enhances 1-butanol gas stripping efficiency by reducing liquid-side mass transfer resistance.
Area of Science:
- Chemical Engineering
- Environmental Science
Background:
- Gas stripping is a crucial separation process.
- Understanding factors affecting butanol stripping is vital for process optimization.
Purpose of the Study:
- To investigate the impact of agitation speed, gas flow rate, and gas type on 1-butanol gas stripping performance.
- To identify key parameters for maximizing stripping efficiency.
Main Methods:
- Systematic investigation of gas stripping parameters.
- Parameter sensitivity analysis.
- Comparison of different non-polar gases (nitrogen, carbon dioxide).
Main Results:
- Butanol stripping rate is linearly dependent on its feed concentration.
- Butanol selectivity decreases at concentrations above 0.01 g/cm³ due to increased gas dissolution.
- Gas flow rate was identified as the dominant influencing variable.
- Carbon dioxide stripping resulted in a 48% drop in Ksa compared to nitrogen stripping.
Conclusions:
- Optimizing gas superficial velocity is key to maximizing 1-butanol gas stripping performance.
- High gas superficial velocity minimizes liquid-side mass transfer resistance, enhancing efficiency.
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