TY - JOUR
T1 - Non-catalytic reduction of total acid number (TAN) of naphthenic acids (NAs) using supercritical methanol
AU - Mandal, Pradip Chandra
AU - Wahyudiono,
AU - Sasaki, Mitsuru
AU - Goto, Motonobu
N1 - Funding Information:
This work was supported by the Global COE program on Global Initiative Center for Pulsed Power Engineering . It was also supported by the Japan Petroleum Energy Center (JPEC) as a technological development project supported financially by the Ministry of Economy, Trade and Industry, Japan.
PY - 2013/2
Y1 - 2013/2
N2 - Naphthenic acid (NA) present in crude oil leads to corrosion problems within oil refineries. The objective of this study is to reduce total acid number (TAN) from NA using a catalyst-free supercritical methanol (SC-MeOH), a process novel in this area. The reaction was carried out in an 8.8 mL batch reactor fabricated from Hastelloy C-276 with respective design temperature and pressure of 500°C and 50 MPa. The ability of SC-MeOH to reduce TAN was explored at temperatures from 300 to 350°C and methanol partial pressure (MPP) of 10 MPa. Experimental results revealed that TAN removal was 99.77% at a temperature of 350°C, MPP of 10 MPa and reaction time of 60 min. The TAN removal followed first order kinetics, with Arrhenius parameters of activation energy 5.78 kcal/ mol and a pre-exponential factor 1.56 s- 1. These results suggest that SC-MeOH is capable of reducing TAN from NA with no use of catalyst or additives.
AB - Naphthenic acid (NA) present in crude oil leads to corrosion problems within oil refineries. The objective of this study is to reduce total acid number (TAN) from NA using a catalyst-free supercritical methanol (SC-MeOH), a process novel in this area. The reaction was carried out in an 8.8 mL batch reactor fabricated from Hastelloy C-276 with respective design temperature and pressure of 500°C and 50 MPa. The ability of SC-MeOH to reduce TAN was explored at temperatures from 300 to 350°C and methanol partial pressure (MPP) of 10 MPa. Experimental results revealed that TAN removal was 99.77% at a temperature of 350°C, MPP of 10 MPa and reaction time of 60 min. The TAN removal followed first order kinetics, with Arrhenius parameters of activation energy 5.78 kcal/ mol and a pre-exponential factor 1.56 s- 1. These results suggest that SC-MeOH is capable of reducing TAN from NA with no use of catalyst or additives.
KW - Acid number
KW - Batch reactor
KW - Heavy oil
KW - Naphthenic acid
KW - Supercritical methanol
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U2 - 10.1016/j.fuproc.2012.09.058
DO - 10.1016/j.fuproc.2012.09.058
M3 - Article
AN - SCOPUS:84870564181
SN - 0378-3820
VL - 106
SP - 641
EP - 644
JO - Fuel Processing Technology
JF - Fuel Processing Technology
ER -