Experimental data and kinetic models in terms of methanol formation during oxygen delignification processes of alkaline pulps
-
Hui-Chao Hu
and
Lihui Chen
Abstract
This paper reports on the formation of methanol (MeOH) during conventional oxygen delignification (OD) of four typical alkaline pulps, namely, southern pine kraft pulp (SP-KP), wheat straw soda pulp (WS-SP), and eucalyptus kraft pulp (E-KP) with κ numbers (KN) of 32.8 and 16.9 (E-KP32.8 and E-KP16.9). Based on the mass transfer effect of MeOH and a proposed demethoxylation reaction pathway of lignin, two kinds of kinetic models were proposed to predict MeOH formation. The results show that the two-stage pseudo kinetic model with a first-order rate equation is adequate, which was further modified to a first-order kinetic model by means of which MeOH formation during OD of the pulps can be effectively predicted. Finally, the single set of kinetic parameters for the WS-SP, E-KP32.8, and E-KP16.9 pulps was calculated. The proposed kinetic model is considered as a valuable tool for the prediction and control of MeOH formation during OD of various alkaline pulps.
Acknowledgments
The authors acknowledge the Research Fund for the Doctoral Program of Higher Education of China (20110172110026) for sponsoring the research.
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Articles in the same Issue
- Frontmatter
- Original Articles
- Extraction and amplification of DNA from aged and archaeological Populus euphratica wood for species identification
- Experimental data and kinetic models in terms of methanol formation during oxygen delignification processes of alkaline pulps
- Purification and characterization of kraft lignin
- Revisiting alkaline nitrobenzene oxidation: quantitative evaluation of biphenyl structures in cedar wood lignin (Cryptomeria japonica) by a modified nitrobenzene oxidation method
- Tensile strength of handsheets prepared with macerated fibres from solid wood modified with cross-linking agents
- Investigation of bamboo pulp fiber-reinforced unsaturated polyester composites
- Mechanical imaging of bamboo fiber cell walls and their composites by means of peakforce quantitative nanomechanics (PQNM) technique
- Wood modification with tricine
- Optimizing cellulose fibrillation for the production of cellulose nanofibrils by a disk grinder
- Surface modification of natural fibers by plasma for improving strength properties of paper sheets
- Comparison of ZnO nanorod array coatings on wood and their UV prevention effects obtained by microwave-assisted hydrothermal and conventional hydrothermal synthesis
- Damage evolution in wood: synchrotron radiation micro-computed tomography (SRμCT) as a complementary tool for interpreting acoustic emission (AE) behavior
- Reinforced hybrid wood-aluminum composites with excellent fire performance
- Corrigendum
- Corrigendum to: Changes of wettability of medium density fiberboard (MDF) treated with He-DBD plasma
Articles in the same Issue
- Frontmatter
- Original Articles
- Extraction and amplification of DNA from aged and archaeological Populus euphratica wood for species identification
- Experimental data and kinetic models in terms of methanol formation during oxygen delignification processes of alkaline pulps
- Purification and characterization of kraft lignin
- Revisiting alkaline nitrobenzene oxidation: quantitative evaluation of biphenyl structures in cedar wood lignin (Cryptomeria japonica) by a modified nitrobenzene oxidation method
- Tensile strength of handsheets prepared with macerated fibres from solid wood modified with cross-linking agents
- Investigation of bamboo pulp fiber-reinforced unsaturated polyester composites
- Mechanical imaging of bamboo fiber cell walls and their composites by means of peakforce quantitative nanomechanics (PQNM) technique
- Wood modification with tricine
- Optimizing cellulose fibrillation for the production of cellulose nanofibrils by a disk grinder
- Surface modification of natural fibers by plasma for improving strength properties of paper sheets
- Comparison of ZnO nanorod array coatings on wood and their UV prevention effects obtained by microwave-assisted hydrothermal and conventional hydrothermal synthesis
- Damage evolution in wood: synchrotron radiation micro-computed tomography (SRμCT) as a complementary tool for interpreting acoustic emission (AE) behavior
- Reinforced hybrid wood-aluminum composites with excellent fire performance
- Corrigendum
- Corrigendum to: Changes of wettability of medium density fiberboard (MDF) treated with He-DBD plasma
