Swelling kinetic study with mathematical modeling of cellulose pulp in aqueous N-methyl-morpholine-N-oxide solution

In the present study, swelling kinetics of cellulose pulp over a wide range of N -methyl-morpholine- N -oxide (NMMO) concentration and the temperature was investigated and a mathematical model was developed based on a corrected swelling ratio. The swelling ratio of cellulose pulp was measured using...

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Bibliographic Details
Published inReaction kinetics, mechanisms and catalysis Vol. 133; no. 1; pp. 101 - 115
Main Authors Sayyed, Anwar J., Mohite, Lalaso V., Deshmukh, Niteen A., Pinjari, Dipak V.
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 2021
Subjects
Catalysis
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Physical Chemistry
Equilibrium swelling
Initial rate of swelling
Cellulose pulp
NMMO
Swelling kinetics
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Summary:In the present study, swelling kinetics of cellulose pulp over a wide range of N -methyl-morpholine- N -oxide (NMMO) concentration and the temperature was investigated and a mathematical model was developed based on a corrected swelling ratio. The swelling ratio of cellulose pulp was measured using an offline mass-based method for the different swelling times. The swelling data thus generated was subsequently corrected by eliminating aqueous NMMO trapped in the porous structure of the pulp. It has been observed that the swelling kinetics data of cellulose in aqueous NMMO solution follow the second-order rate equation. A unified correlation is developed to express the dependence of rate constant and equilibrium swelling on NMMO concentration and temperature. Further heat of mixing is calculated from this correlation and it is seen that the swelling phenomena are endothermic in nature.
ISSN:1878-5190
1878-5204
DOI:10.1007/s11144-021-02000-0