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Deconvolution technique for the kinetic analysis of a complex reaction and the related thermodynamic functions of the formation of LiMn0.90Co0.05Mg0.05PO4
Author(s)
Sronsri, Chuchai
Date Issued
December 16, 2017
Type
Article
Abstract
Four separated peaks of the thermal reaction of the mixture between NH4Mn0.90Co0.05Mg0.05PO4⋅H2O and Li2CO3 were considered to be dehydration, deammoniation, polycondensation and decarbonization. Alternative technique for the conversion calculation was proposed by using the deconvoluted DTG peak after the Fraser–Suzuki equation was used. Iteration was used to estimate the activation energy Eα. Each peak was confirmed as a single-step kinetic. Dual-plots were compared to choose the mechanisms. Mechanisms were found to be contracting cylinder, contracting sphere, assumed random nucleation and 2D diffusion. Pre-exponential factor was obtained from Eα and mechanisms. Thermodynamic data were found to agree with the experimental data.
Citation
Chemical Physics Letters, 690, 116-128, 2017