| Title | Recycling of TEMPO-mediated oxidation medium and its effect on nanocellulose properties |
|---|---|
| ID_Doc | 25839 |
| Authors | Xu, HY; Sanchez-Salvador, JL; Blanco, A; Balea, A; Negro, C |
| Title | Recycling of TEMPO-mediated oxidation medium and its effect on nanocellulose properties |
| Year | 2023 |
| Published | |
| Abstract | The potential of TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy)-mediated oxidation (TMO) to produce cellulose nanofibrils (CNFs) is hindered using costly and environmentally harmful catalysts, limiting its large-scale implementation. To promote sustainability, the TMO medium should be reused but there is a lack of knowledge on this process. The novelty of this research is the identification of the key parameters that affect the recirculation of the TMO medium, and their impact on the quality of the oxidized pulps and CNF products. Contrary to previous hypothesis, results show that the accumulation of salts is not a key parameter; instead, the pulp consistency during oxidation plays a vital role since concentrations higher than 10 g/L led to better CNF quality. Thus, reusing 75 % of the reaction medium, when high pulp consistency is used, does not alter the CNF properties. By reusing the reaction medium up to six times, the catalyst dose is dramatically reduced by >90 % for TEMPO and 80 % for NaBr, compared to the conventional process (0.1 mmol of TEMPO/g and 1 mmol of NaBr/g without medium reuse). Additionally, the high consistency oxidation enables a reduction of >80 % in the reaction time and effluent, and thus a threefold increase in CNF production. |
| https://doi.org/10.1016/j.carbpol.2023.121168 |
Similar Articles
| ID | Score | Article |
|---|---|---|
12919
|
Stampino, PG; Riva, L; Punta, C; Elegir, G; Bussini, D; Dotelli, G Comparative Life Cycle Assessment of Cellulose Nanofibres Production Routes from Virgin and Recycled Raw Materials(2021)Molecules, 26.0, 9 | |
| 22745
|
Balea, A; Merayo, N; De La Fuente, E; Negro, C; Blanco, A Assessing the influence of refining, bleaching and TEMPO-mediated oxidation on the production of more sustainable cellulose nanofibers and their application as paper additives(2017) | |
| 21186
|
Balea, A; Sanchez-Salvador, JL; Monte, MC; Merayo, N; Negro, C; Blanco, A In Situ Production and Application of Cellulose Nanofibers to Improve Recycled Paper Production(2019)Molecules, 24.0, 9 | |
| 26734
|
Sánchez-Gutiérrez, M; Espinosa, E; Bascón-Villegas, I; Pérez-Rodríguez, F; Carrasco, E; Rodríguez, A Production of Cellulose Nanofibers from Olive Tree Harvest-A Residue with Wide Applications(2020)Agronomy-Basel, 10, 5 |