| Title: | Utilization Perspectives of Lignin Biochar from Industrial Biomass Residue |
| Author(s): | Naydenova I; Radoykova T; Petrova T; Sandov O; Valchev I; |
| Address: | "Department of Energy and Mechanical Engineering, Technical College-Sofia, Technical University of Sofia, 1000 Sofia, Bulgaria. Department of Pulp, Paper and Printing Arts, Faculty of Chemical Technologies, University of Chemical Technology and Metallurgy, 1000 Sofia, Bulgaria" |
| DOI: | 10.3390/molecules28124842 |
| ISSN/ISBN: | 1420-3049 (Electronic) 1420-3049 (Linking) |
| Abstract: | "The present study aimed at utilizing technically hydrolyzed lignin (THL), industrial biomass residue, derived in high-temperature diluted sulfuric acid hydrolysis of softwood and hardwood chips to sugars. The THL was carbonized in a horizontal tube furnace at atmospheric pressure, in inert atmosphere and at three different temperatures (500, 600, and 700 degrees C). Biochar chemical composition was investigated along with its HHV, thermal stability (thermogravimetric analysis), and textural properties. Surface area and pore volume were measured with nitrogen physisorption analysis often named upon Brunauer-Emmett-Teller (BET). Increasing the carbonization temperature reduced volatile organic compounds (40 / 96 wt. %), increased fixed carbon (2.11 to 3.68 times the wt. % of fixed carbon in THL), ash, and C-content. Moreover, H and O were reduced, while N- and S-content were below the detection limit. This suggested biochar application as solid biofuel. The biochar Fourier-transform infrared (FTIR) spectra revealed that the functional groups were gradually lost, thus forming materials having merely polycyclic aromatic structures and high condensation rate. The biochar obtained at 600 and 700 degrees C proved having properties typical for microporous adsorbents, suitable for selective adsorption purposes. Based on the latest observations, another biochar application was proposed-as a catalyst" |
| Keywords: | *Lignin Biomass *Charcoal/chemistry Carbon/chemistry Adsorption biochar characterization carbonization technically hydrolyzed lignin; |
| Notes: | "MedlineNaydenova, Iliyana Radoykova, Temenuzhka Petrova, Tsvetelina Sandov, Ognyan Valchev, Ivo eng 577/17.08.2028/Ministry of Education and Science/ capital KA, Cyrilliccapital PE, Cyrillic-06-capital EN, Cyrillic44-5/14.07.2021/Ministry of Education and Science/ Switzerland 2023/06/28 Molecules. 2023 Jun 18; 28(12):4842. doi: 10.3390/molecules28124842" |
