Kinetics of Periodate-Mediated Oxidation of Cellulose
Artikel i vetenskaplig tidskrift, 2024

The oxidation of cellulose to dialdehyde cellulose (DAC) is a process that has received increased interest during recent years. Herein, kinetic modeling of the reaction with sodium periodate as an oxidizing agent was performed to quantify rate-limiting steps and overall kinetics of the cellulose oxidation reaction. Considering a pseudo-first-order reaction, a general rate expression was derived to elucidate the impact of pH, periodate concentration, and temperature on the oxidation of cellulose and concurrent formation of cellulose degradation products. Experimental concentration profiles were utilized to determine the rate constants for the formation of DAC (k1), degradation constant of cellulose (k2), and degradation of DAC (k3), confirming that the oxidation follows a pseudo-first-order reaction. Notably, the increase in temperature has a more pronounced effect on k1 compared to the influence of IO4− concentration. In contrast, k2 and k3 display minimal changes in response to IO4− concentration but increase significantly with increasing temperature. The kinetic model developed may help with understanding the rate-limiting steps and overall kinetics of the cellulose oxidation reaction, providing valuable information for optimizing the process toward a faster reaction with higher yield of the target product.

periodate

cellulose

oxidation

cellulose derivatives

dialdehyde

kinetic model

Författare

Nazmun Sultana

Kungliga Tekniska Högskolan (KTH)

Chalmers, Kemi och kemiteknik, Kemi och biokemi

Ulrica Edlund

Kungliga Tekniska Högskolan (KTH)

Chandan Guria

Indian Institute of Technology

Gunnar Westman

Chalmers, Kemi och kemiteknik, Kemi och biokemi

Polymers

2073-4360 (eISSN)

Vol. 16 3 381

Design for Circularity: Lignocellulose based Thermoplastics - Fib:Re

VINNOVA (2019-00047), 2020-01-01 -- 2024-12-31.

Ämneskategorier

Pappers-, massa- och fiberteknik

DOI

10.3390/polym16030381

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Senast uppdaterat

2024-05-29