Optimization of Lignin Recovery from the Pre-Hydrolysate of Kraft-Based Dissolving Pulp Production Processes
A pre-hydrolysate is an aqueous stream obtained during the production of hardwood kraft dissolving pulp. It is rich in sugars and contains dissolved organic matters. The purpose of this study is to investigate the optimization of lignin recovery from wood pre-hydrolysates and to characterize the ext...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-01-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/11/1/454 |
| _version_ | 1827698363025326080 |
|---|---|
| author | Adil Mazar Naceur Jemaa Waleed Wafa Al Dajani Mariya Marinova Michel Perrier |
| author_facet | Adil Mazar Naceur Jemaa Waleed Wafa Al Dajani Mariya Marinova Michel Perrier |
| author_sort | Adil Mazar |
| collection | DOAJ |
| description | A pre-hydrolysate is an aqueous stream obtained during the production of hardwood kraft dissolving pulp. It is rich in sugars and contains dissolved organic matters. The purpose of this study is to investigate the optimization of lignin recovery from wood pre-hydrolysates and to characterize the extracted lignin. The optimal conditions for lignin extraction have been determined to be (a) a filtration temperature of 40 °C, (b) a sulfuric acid concentration of 8.5 kg·m<sup>−3</sup>, and (c) a coagulation time of 180 min. Using these conditions, high filtration rates have been obtained and the extracted lignin has a low content of impurities (8.3%), a low molecular weight (1270 Da), and a very low polydispersity (Mw/Mn = 1.22). Compared to kraft lignin, the pre-hydrolysate lignin has a much lower molecular weight and could be a potential candidate for niche applications. A high lignin recovery rate is possible (52% of the total lignin content in the pre-hydrolysate). |
| first_indexed | 2024-03-10T13:29:21Z |
| format | Article |
| id | doaj.art-bacfb7b932b94b3aba3e90718725db20 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T13:29:21Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-bacfb7b932b94b3aba3e90718725db202023-11-21T08:29:06ZengMDPI AGApplied Sciences2076-34172021-01-0111145410.3390/app11010454Optimization of Lignin Recovery from the Pre-Hydrolysate of Kraft-Based Dissolving Pulp Production ProcessesAdil Mazar0Naceur Jemaa1Waleed Wafa Al Dajani2Mariya Marinova3Michel Perrier4Chemical Engineering Department, Ecole Polytechnique de Montreal, Montreal, QC H3T 1J4, CanadaFPInnovations, Pulp, Paper and Bioproducts, 570 St John Blvd, Pointe Claire, QC H9R 3J9, CanadaFPInnovations, Pulp, Paper and Bioproducts, 570 St John Blvd, Pointe Claire, QC H9R 3J9, CanadaChemistry and Chemical Engineering, Royal Military College of Canada, Kingston, ON K7K 7B4, CanadaChemical Engineering Department, Ecole Polytechnique de Montreal, Montreal, QC H3T 1J4, CanadaA pre-hydrolysate is an aqueous stream obtained during the production of hardwood kraft dissolving pulp. It is rich in sugars and contains dissolved organic matters. The purpose of this study is to investigate the optimization of lignin recovery from wood pre-hydrolysates and to characterize the extracted lignin. The optimal conditions for lignin extraction have been determined to be (a) a filtration temperature of 40 °C, (b) a sulfuric acid concentration of 8.5 kg·m<sup>−3</sup>, and (c) a coagulation time of 180 min. Using these conditions, high filtration rates have been obtained and the extracted lignin has a low content of impurities (8.3%), a low molecular weight (1270 Da), and a very low polydispersity (Mw/Mn = 1.22). Compared to kraft lignin, the pre-hydrolysate lignin has a much lower molecular weight and could be a potential candidate for niche applications. A high lignin recovery rate is possible (52% of the total lignin content in the pre-hydrolysate).https://www.mdpi.com/2076-3417/11/1/454lignin recoverypre-hydrolysatekraft dissolving pulplignin extraction |
| spellingShingle | Adil Mazar Naceur Jemaa Waleed Wafa Al Dajani Mariya Marinova Michel Perrier Optimization of Lignin Recovery from the Pre-Hydrolysate of Kraft-Based Dissolving Pulp Production Processes Applied Sciences lignin recovery pre-hydrolysate kraft dissolving pulp lignin extraction |
| title | Optimization of Lignin Recovery from the Pre-Hydrolysate of Kraft-Based Dissolving Pulp Production Processes |
| title_full | Optimization of Lignin Recovery from the Pre-Hydrolysate of Kraft-Based Dissolving Pulp Production Processes |
| title_fullStr | Optimization of Lignin Recovery from the Pre-Hydrolysate of Kraft-Based Dissolving Pulp Production Processes |
| title_full_unstemmed | Optimization of Lignin Recovery from the Pre-Hydrolysate of Kraft-Based Dissolving Pulp Production Processes |
| title_short | Optimization of Lignin Recovery from the Pre-Hydrolysate of Kraft-Based Dissolving Pulp Production Processes |
| title_sort | optimization of lignin recovery from the pre hydrolysate of kraft based dissolving pulp production processes |
| topic | lignin recovery pre-hydrolysate kraft dissolving pulp lignin extraction |
| url | https://www.mdpi.com/2076-3417/11/1/454 |
| work_keys_str_mv | AT adilmazar optimizationofligninrecoveryfromtheprehydrolysateofkraftbaseddissolvingpulpproductionprocesses AT naceurjemaa optimizationofligninrecoveryfromtheprehydrolysateofkraftbaseddissolvingpulpproductionprocesses AT waleedwafaaldajani optimizationofligninrecoveryfromtheprehydrolysateofkraftbaseddissolvingpulpproductionprocesses AT mariyamarinova optimizationofligninrecoveryfromtheprehydrolysateofkraftbaseddissolvingpulpproductionprocesses AT michelperrier optimizationofligninrecoveryfromtheprehydrolysateofkraftbaseddissolvingpulpproductionprocesses |