Herry, Alan (2020) Large Scale Lignin Organosolv Extraction. Bachelor's Thesis, Chemical Engineering.
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Abstract
Three chemical plant designs were investigated to extract lignin from 10 tonnes of walnut shells annually by organosolv extraction. Two of those plants are identical in structure, however the difference is in the extraction method used. One plant has a batch extraction system whereas the other plant utilises a flow through extraction. The extraction is done in batches of 5.7 tonnes and a mixture of ethanol and water (80:20) as solvent. The conditions used for the extraction are 80°C at 6 bar for 5 hours, which yielded annually 2000 tonnes and 2370 tonnes of organosolv lignin respectively. In the third plant, the extraction method used was a flow through process performed in 3 hours at 120°C and 6 bar. This process also yielded 2370 tonnes of organosolv lignin. A P&ID was made for the whole process to have a general overview of the instrument used to control each equipment used in the plant. A HAZOP study was also conducted to further identify any potential risks and then install additional safeguards to lower these risks. When modelling in Aspen plus, lignin is not a compound present within the Aspen database. Thus, many assumption had to be made, as a result, any values obtained for the duty and stream composition are regarded as inaccurate. Despite that, the simulation does provide a relative estimate of the processes. A financial analysis was performed and it was found that at identical operating conditions, a batch extraction is more economically favourable.
| Item Type: | Thesis (Bachelor's Thesis) |
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| Supervisor name: | Deuss, P.J. and Winkelman, J.G.M. |
| Degree programme: | Chemical Engineering |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 03 Jul 2020 11:24 |
| Last Modified: | 03 Jul 2020 11:24 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/22380 |
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