KINETIC STUDY ON PYROLYSIS OF NSSC BLACK LIQUOR IN A NITROGEN ATMOSPHERE
Abstract
Thermogravimetric analysis experiments were carried out to investigate the pyrolysis properties of neutral sulfite semi-chemical pulp (NSSC) black liquor ranging from room temperature to 800°C with heating rates of 20°, 30°, 50°C/min. Experimental results show that the black liquor quickly loses weight in the temperature range of 170°–370°C, 370°–570°C, and 570°–800°C. The organic volatiles are mostly released in the former two ranges, while the alkali metal salts decompose, volatilize, and react in the third range. The mechanism function of NSSC black liquor pyrolysis is determined by means of the thermal analytic dynamics method and the most probable mechanism functions. The kinetic parameters for the chemical reactions were calculated by the Coats and Redfern method and the Ozawa method. Meanwhile, the pyrolysis dynamics equation of the NSSC black liquor is presented in this work. The results show that the activation energies of the NSSC black liquor decomposition calculated by the Ozawa method in the three temperature ranges are in general lower than that those calculated by the Coats and Redfern method.
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Detailed pyrolysis kinetics and fast pyrolysis properties of BLS were still lacking.
“Nevertheless, the detailed pyrolysis kinetics and fast pyrolysis properties of BLS were still lacking.”
From Evaluation of pyrolysis characteristics and product distribution of black liquor using Py-GC/MS and down tube reactor: Comparison with lignin (2021) · cites this paper as [21]
The more complex the composition, the greater the Ea fluctuation.
“The more complex the composition was, the greater the Ea fluctuation was [20,21].”
From Evaluation of pyrolysis characteristics and product distribution of black liquor using Py-GC/MS and down tube reactor: Comparison with lignin (2021) · cites this paper as [21]
Cites
Thermogravimetric behavior of black liquors and their organic constituents
Alén, R., Rytkönen, S., & McKeough, P. (1995) · Journal of Analytical and Applied Pyrolysis · doi:10.1016/0165-2370(94)00811-e · Cited by 59 · cited 2× · see citing works
“A study was performed with black liquor and its organic constituents were investigated by means of thermogravimetric studies in the temperature range of 25 –700 C under an inert nitrogen atmosphere (Alén et al., 1995).”
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Zhao, Y., Zhang, H., Zong, P., Zhou, H., & Tian, Y. (2021) · Fuel · doi:10.1016/j.fuel.2021.120286 · Cited by 36 · see citing works
Self-citation
- Authors
- Zhao, Y., Bie, R., Lu, J., & Xiu, T.
- Affiliations
- Harbin Institute of Technology (CN)
- Corresponding author
- Bie, Rushan
- Venue
- Chemical Engineering Communications
- Publisher
- Informa UK Limited
- Published
- 2010-03-12
- Volume
- 197
- Issue
- 7
- Pages
- 1033-1047
- ISSN
- 0098-6445 (ISSN-L)
- 1563-5201
- OpenAlex
- W2030818259
- Cited by
- 15
- References
- 1
- Citations by year
- 2026: 2 · 2025: 1 · 2024: 1 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 1 · 2016: 1 · 2015: 2 · 2014: 1 · 2012: 2
- FWCI
- 0.47
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Chemical Engineering Communications (publishedVersion)
- Funders
- Natural Science Foundation of Heilongjiang Province
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Thermal and Kinetic Analysis
- Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
- Physical Sciences › Engineering › Biomedical Engineering › Lignin and Wood Chemistry
- Keywords
- pyrolysis kinetics, activation energy, mechanism function, Coats-Redfern method, Ozawa method, volatile organic compounds, heating rate effects
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