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Solvent free depolymerization of Kraft lignin to alkyl-phenolics using supported NiMo and CoMo catalysts
| Content Provider | Semantic Scholar |
|---|---|
| Author | Kumar, Chowdari Ramesh Anand, Narani Kloekhorst, Arjan Cannilla, Catia Bonura, Giuseppe Frusteri, Francesco Barta, Katalin Heeres, Hero J. |
| Copyright Year | 2015 |
| Abstract | The catalytic hydrotreatment of Kraft lignin using sulfided NiMo and CoMo catalysts on different acidic and basic supports (Al2O3, ZSM-5, activated carbon (AC) and MgO-La2O3) was studied in the absence of a solvent. Experiments were carried out in a batch set-up at a reaction temperature of 350 °C, 4 h and 100 bar initial H2 pressure. The catalysts before and after reaction were characterized by X-ray diffraction, temperature programmed desorption of ammonia/CO2, BET surface area and scanning electron microscopy. The liquid products were fractionated and analyzed extensively by different techniques such as GPC, GC-MS-FID, GC-TCD, FT-IR, 13C-NMR and elemental analyses. Two dimensional gas chromatography (GC × GC-FID) was applied to identify distinct groups of compounds (aromatics, alkylphenolics, alkanes) after reaction, and product quantification was performed based on this method. Catalyst activity is a function of the support and increased in the order Al2O3 < ZSM-5 < AC = MgO-La2O3. In addition, the support also largely influenced the extent of depolymerization and monomer yield. The highest lignin oil yields were obtained using the sulfided NiMo supported on activated carbon and MgO-La2O3. The highest total monomer yield 26.4 wt% on lignin intake, which included 15.7 wt% alkyl-phenolics was obtained using the sulfided NiMo/MgO-La2O3 catalyst. |
| Starting Page | 4921 |
| Ending Page | 4930 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/C5GC01641J |
| Volume Number | 17 |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c5/gc/c5gc01641j/c5gc01641j1.pdf |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/getauthorversionpdf/C5GC01641J |
| Alternate Webpage(s) | https://doi.org/10.1039/C5GC01641J |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
