| Title |
Mesoporous Silica Nanocatalyst-Based Pyrolysis of a By-Product of Paper Manufacturing, Black Liquor |
| ID_Doc |
12639 |
| Authors |
Marin, F; Bucura, F; Niculescu, VC; Roman, A; Botoran, OR; Constantinescu, M; Spiridon, SI; Ionete, EI; Oancea, S; Zaharioiu, AM |
| Title |
Mesoporous Silica Nanocatalyst-Based Pyrolysis of a By-Product of Paper Manufacturing, Black Liquor |
| Year |
2024 |
| Published |
Sustainability, 16.0, 8 |
| Abstract |
The valorization of black liquor, a by-product produced in considerable quantities from the paper manufacturing processes, has demonstrated the effectiveness of thermal reconversion into pyrolysis gas, bio-oil, and bio-char, a sustainable approach placing the feedstock into a circular economy concept. The present study focused on developing disposal solutions through energy recovery via pyrolysis at 300 degrees C and 450 degrees C when lignite and nanomaterials (such as Cu-Zn-MCM-41, Ni-SBA-3, or Ni-SBA16) were used as catalysts. The results were compared to those of non-catalytic pyrolysis. The use of the Cu-Zn-MCM-41 catalyst proved to be efficient for pyrolysis gas production, reaching 55.22 vol% CH4. The increase in the calorific value of the pyrolysis gas was associated with the use of the Cu-Zn-MCM-41, showing a value of 42.23 MJ/m(3) compared to that of the non-catalytic process, which yielded 39.56 MJ/m(3). The bio-oil resulting from the pyrolysis with Cu-Zn-MCM-41 showed the highest energy value at 6457 kcal/kg compared to that obtained with the other two nanocatalysts, Ni-SBA-3 and Ni-SBA-16, as well as that of the raw material, which had a value of 3769 kcal/kg. The analysis of bio-char revealed no statistically significant differences when comparing the outcomes from using the various nanocatalysts, suggesting their minimal impact on the energy content. |
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