In the field of adiabatic correction for complex reactions

a simple one-stage kinetic model was used to estimate the real reaction kinetics. However

this assumption simplified the real process

inevitably generated inaccurate or even unsafe results. Therefore

it was necessary to find a new correction method for complex reactions. In this work

esterification of acetic anhydride by methanol was chosen as an object reaction of study. The reaction was studied under different conditions by Reaction Calorimeter (RC1). Then

Thermal Safety Software (TSS) was used to establish the kinetic model and estimate the parameters

where

activation energies for three stages were 67.09

81.02

73.77 kJ·mol

-1

respectively

and corresponding frequency factors in logarithmic form were 16.05

19.59

15.72 s

-1

. In addition

two adiabatic tests were performed by Vent Sizing Package2 (VSP2). For accurate correction of VSP2 tests

a new correction method based on Enhanced Fisher method was proposed. Combined with kinetics

adiabatic correction of esterification reaction was achieved. Through this research

accurate kinetic parameters for a three-step kinetic model of

the esterification reaction were acquired. Furthermore

the correlation coefficients between simulated curves and corrected curves were 0.976 and 0.968

which proved the accuracy of proposed new adiabatic correction method. Based on this new method

conservative corrected results were able to be acquired and be applied in safety assessment.