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Estimation of kinetic and mass-transfer parameters for cellulose nitration

✍ Scribed by I. V. M. Barbosa; D. M. Merquior; F. C. Peixoto

Publisher
American Institute of Chemical Engineers
Year
2006
Tongue
English
Weight
102 KB
Volume
52
Category
Article
ISSN
0001-1541

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✦ Synopsis

Abstract

When nitrocellulose is used in the production of gun powders and rocket/missile propellants, rigid control of the cellulose nitration reaction is necessary. Nitrogen content is, by far, the most important parameter to be controlled and only off‐line measurements can be performed for that. Although cellulose is a natural polymer whose characteristics may vary, the final product must have its nonuniformities compensated by blending of different batches. In this work, kinetic and mass‐transfer parameters are nonlinearly fitted using typical nitration experiments. The required mathematical modeling is carried out using a continuous mixtures approach, which depends only on structural descriptions of the cellulose. The model leads to an algebraic‐integro‐differential population balance system of equations, solved with an approximant built with block‐pulse functions. © 2006 American Institute of Chemical Engineers AIChE J, 2006

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