Gas phase conversion of waste glycerol to synthesis gas : equilibrium product distribution
- Authors: Jalama, Kalala
- Date: 2012
- Subjects: Glycerol , Synthesis gas , Gas phase conversion
- Type: Article
- Identifier: uj:6022 , ISSN 978-988-19252-4-4 , http://hdl.handle.net/10210/10041
- Description: Please refer to full text to view abstract
- Full Text:
- Authors: Jalama, Kalala
- Date: 2012
- Subjects: Glycerol , Synthesis gas , Gas phase conversion
- Type: Article
- Identifier: uj:6022 , ISSN 978-988-19252-4-4 , http://hdl.handle.net/10210/10041
- Description: Please refer to full text to view abstract
- Full Text:
Glycerol - a viable solvent for absorption of highly polar solutes II : behaviour of molecular interactions
- Scheepers, Jacques J., Muzenda, Edison, Belaid, Mohamed
- Authors: Scheepers, Jacques J. , Muzenda, Edison , Belaid, Mohamed
- Date: 2015
- Subjects: Activity coefficients , Glycerol , Solubility , Volatile organic compounds , Scrubbing solvents
- Type: Article
- Identifier: uj:5054 , http://hdl.handle.net/10210/13593
- Description: This work focused on the potential of glycerol as a scrubbing solvent for stripping of highly polar volatile organic compounds (VOCs) from industrial waste gas streams. Results for glycerol interactions were compared to those of water. Solubility predictions in the form of infinite dilution activity coefficients were made using the Modified UNIFAC Dortmund group contribution model, which was set up on a Microsoft Excel spreadsheet specifically designed for this purpose. Activity coefficients for VOCs in water and glycerol (highly polar solvents) increased with an increase in the length of the VOC solute nonpolar tail. Furthermore, activity coefficients decreased with an increase in the degree of branching of the VOC solute. The results show that low chain length highly polar alcohol, ketone, organic acid and aldehyde solutes are very soluble in glycerol. Diols, dicarbonyl aldehydes, some ketone derivatives and the ethanolamines also show good solubility. Highly polar diesters and ester derivatives are less soluble in glycerol and water. This study has found glycerol to be a better scrubbing solvent than water in treating highly polar VOCs. However it is possible that the standard method of building up the glycerol molecule in the UNIFAC may result in under-predictions of activity coefficients and thus special group interaction parameters for glycerol are required.
- Full Text:
- Authors: Scheepers, Jacques J. , Muzenda, Edison , Belaid, Mohamed
- Date: 2015
- Subjects: Activity coefficients , Glycerol , Solubility , Volatile organic compounds , Scrubbing solvents
- Type: Article
- Identifier: uj:5054 , http://hdl.handle.net/10210/13593
- Description: This work focused on the potential of glycerol as a scrubbing solvent for stripping of highly polar volatile organic compounds (VOCs) from industrial waste gas streams. Results for glycerol interactions were compared to those of water. Solubility predictions in the form of infinite dilution activity coefficients were made using the Modified UNIFAC Dortmund group contribution model, which was set up on a Microsoft Excel spreadsheet specifically designed for this purpose. Activity coefficients for VOCs in water and glycerol (highly polar solvents) increased with an increase in the length of the VOC solute nonpolar tail. Furthermore, activity coefficients decreased with an increase in the degree of branching of the VOC solute. The results show that low chain length highly polar alcohol, ketone, organic acid and aldehyde solutes are very soluble in glycerol. Diols, dicarbonyl aldehydes, some ketone derivatives and the ethanolamines also show good solubility. Highly polar diesters and ester derivatives are less soluble in glycerol and water. This study has found glycerol to be a better scrubbing solvent than water in treating highly polar VOCs. However it is possible that the standard method of building up the glycerol molecule in the UNIFAC may result in under-predictions of activity coefficients and thus special group interaction parameters for glycerol are required.
- Full Text:
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