%0 Journal Article
%@ 10219986
%A Mandal, P.C.
%A Nasir, H.S.M.
%D 2017
%F scholars:8400
%J Iranian Journal of Chemistry and Chemical Engineering
%N 5
%P 143-147
%T Total acid number reduction of naphthenic acid using subcritical methanol: A kinetic study
%U https://khub.utp.edu.my/scholars/8400/
%V 36
%X The aim of this study is to explore the capability of subcritical methanol to reduce the acidity of naphthenic acids and to determine reaction kinetics for large-scale reactor design. The experiments were carried out in a 25 mL autoclave reactor (China) at temperatures of 70-120oC, Methanol Partial Pressures (MPPs) of 0.1-1.5 MPa, and reaction times of 0-60 min. The total acid number content of the samples was analyzed using ASTM D 974 techniques. Experimental results reveal that total acid number reduction of naphthenic acids increased with increasing reaction temperature, MPP, and reaction time. Approximately 74.20 total acid number was reduced at a temperature of 120oC, a MPP of 1 MPa, and a reaction time of 60 min. Experimental data revealed that total acid number removal reaction kinetics followed second-order kinetics with an activation energy of 11.27 kcal/mol. Therefore, subcritical methanol is able to reduce the total acid number of naphthenic acids without the addition of any catalyst. © 2018, Iranian Journal of Chemistry and Chemical Engineering. All rights reserved.
%Z cited By 0