Total Acid Number Determination in Residues of Crude Oil Distillation Using ATR-FTIR and Variable Selection by Chemometric Methods

2010 ◽  
Vol 24 (10) ◽  
pp. 5474-5478 ◽  
Author(s):  
Graciele Parisotto ◽  
Marco F. Ferrão ◽  
Aline L. H. Müller ◽  
Edson I. Müller ◽  
Maria F. P. Santos ◽  
...  
Keyword(s):  
Variable Selection ◽  
Crude Oil ◽  
Acid Number ◽  
Chemometric Methods ◽  
Total Acid ◽  
Total Acid Number ◽  
Crude Oil Distillation

Enhancing Rheological Properties and Reduction of Total Acid Number of a Heavy Crude Oil Using Ethanol and Trona

2021 ◽  
Author(s):  
Ahmed Almadhaji ◽  
Mohammed Saeed ◽  
Hitham Ibrahim ◽  
Anas Ahmed ◽  
Ragaei Maher
Keyword(s):  
Crude Oil ◽  
Rheological Properties ◽  
Kinematic Viscosity ◽  
Acid Number ◽  
Capillary Viscometer ◽  
Heavy Crude Oil ◽  
Production Operation ◽  
Total Acid ◽  
Total Acid Number ◽  
Heavy Crude

Abstract One of Sudanese fields has a heavy crude oil which has a high Total Acid Number (TAN) and high viscosity, can cause a lot of problems in production operation, transport, and storage facilities. The effect of ethanol dilution on the rheological properties of crude (especially the kinematic viscosity) was studied and presented. Moreover, the consequence of blending Trona (NaHCO3.Na2CO3) with a specified amount of Ethanol in the crude can reduce (TAN) to acceptable limits for solving corrosion and flowability problems. The approach is based on the experiments and laboratory works on the crude's samples after blending with a certain amount of Trona and Ethanol. It depends on the results of apparatuses, that are used to measure the samples, for instance, Calibrated glass capillary viscometer and ASTM D664 titration volume Total Acid Number tester which are employed to get the values of kinematic viscosity and TAN, respectively. The tests are established with crude have kinematic viscosity (187 cst) at temperature 75°C and TAN almost (8.51). While increasing the dosage of Trona at the ambient temperature (38°C) with the certain mass percentage of Ethanol (5%), TAN is decreased from (8.51 to 4.00 mgKOH/g). Also, the kinematic viscosity is declined from (187 cst to 96.75 cst) after increasing the volume of Ethanol at 75°C. These outcomes indicated that Ethanol could reduce Sudanese heavy crude's viscosity, and the Trona could decrease the TAN. This reduction occurred due to Ethanol dilution. The Ethanol molecules disturb the molecular structure of the crude, which forms polar bond within the hydrocarbon chain that leads to lower the friction between molecules of hydrocarbon in the crude. Also, Trona shrinks TAN because the Hydroxide ions (OH+) that founded in Trona neutralize the Hydrogen ions (H−) in Naphthenic acid in Sudanese heavy crude. This study can be summarized in the ability to solve the difficulty of transporting and processing the heavy crude oil in refineries; maintains the quality of the crude while utilizing it with friendly environmental materials and low cost.

Deacidification of Acidic Petroleum Crude Oil Utilizing a Formulated Basic Chemical

2015 ◽  
Vol 1107 ◽  
pp. 335-340 ◽  
Author(s):  
Nurasmat Mohd Shukri ◽  
Jafariah Jaafar ◽  
Wan Azelee Wan Abu Bakar ◽  
Zaiton Abdul Majid
Keyword(s):  
Polyethylene Glycol ◽  
Crude Oil ◽  
New Technology ◽  
Acid Number ◽  
Refining Process ◽  
Oil Refining ◽  
Petroleum Crude ◽  
Total Acid ◽  
Total Acid Number ◽  
Stirring Time

An increasing interest in acidic fractions in crude oil was prompted by the corrosion problems that these compounds caused during oil refining process. This corrosion is associated with the total acid number (TAN). With the anticipated growth of acidic crudes in the market, a new technology for removal of the acidic fractions was introduced. Petronas Penapisan Melaka Light Crude (B) with TAN values of 2.52 was studied. The ammoniated polyethylene glycol (PEG) was used as the deacidifying agent in this study with a concentration range of 100-2500 mg/L. Data indicated that the optimal content of ammoniated polyethylene glycol in crude B was 1500 mg/L, and PEG with molecular weight of 2000 was the most promising co-solvent with the reagent/oil ratio being 0.4:1 (wt/wt). A reaction time of 5 min with a suitable reaction temperature of 40°C and optimal stirring time of 5 min were sufficient to achieve the goal for crude oil B. The TAN was lowered to 0.28 for crude oil B. The percentage of acid removal for crude B was 78. An increase in the concentration of basic chemical reduced the TAN value for crude oil B to less than 1.

scholarly journals EXTRACTION OF NAPHTHENIC ACIDS FROM ACIDIC PETROLEUM CRUDE OIL UTILIZING 2-METHYLIMIDAZOLE WITH THE AID OF Ca/Al2O3 AND Ce/Al2O3 CATALYSTS

2019 ◽  
Vol 7 (SI-TeMIC18) ◽  
Author(s):  
Norshahidatul Akmar Shohaimi ◽  
Wan Azelee Wan Abu Bakar ◽  
Nurasmat Mohd Shukri ◽  
Khairan Shaidi
Keyword(s):  
Crude Oil ◽  
Reaction Times ◽  
Naphthenic Acids ◽  
Acid Number ◽  
Catalyst Loading ◽  
Total Acid ◽  
Characterization Methods ◽  
Oil Refineries ◽  
Total Acid Number ◽  
Al2o3 Catalyst

Naphthenic acids (NAs) is one of the major sources of corrosion in oil pipelines and distillation units in crude oil refineries. Removing NA compounds from crude oils is regarded as one of the most crucial processes in heavy oil upgrading. Catalytic deacidification method had been developed in order to reduce the total acid number values in crude oil. Crude oil from Petronas Penapisan Melaka had been chosen to be studied with original total acid number (TAN) of 2.43 mg KOH/g. The parameters used were different catalyst calcination temperatures, catalyst loading, reagent concentration, reaction times and reaction temperature. Acid removal agent of 2-methylimidazole in ethanol and monometallic calcium and cerium doped with alumina were used as a catalyst. The results showed that with the aid of catalyst, the TAN can be reduced to lower than 1 mg KOH/g. Catalyst of Ca/Al2O3 calcined at 900oC gave a better reduction than Ce/Al2O3 with 83.54% of TAN reduction (2.43 to 0.4) for Ca/Al2O3 catalyst and 71.19% (2.43 to 0.7) for Ce/Al2O3 catalyst. The best catalyst underwent several characterization methods such as X-Ray Diffraction Spectroscopy (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Thermogravimetry Analysis (TGA-DTA) for its physicochemical properties. It can be concluded that catalytic deacidification method was effective in extracting NAs from the crude oil thus lowered the TAN value to less than 1 mg KOH/g. Keywords: Naphthenic acids; Crude oil; Catalysts

Catalytic removal of naphthenic acids over Co-Mo/γ-Al2O3 catalyst to reduce total acid number (TAN) of highly acidic crude oil

2020 ◽  
Vol 606 ◽  
pp. 117835
Author(s):  
Kanghee Cho ◽  
Bharat Singh Rana ◽  
Dong-Woo Cho ◽  
Hee Tae Beum ◽  
Cheol-Hyun Kim ◽  
...  
Keyword(s):  
Crude Oil ◽  
Naphthenic Acids ◽  
Acid Number ◽  
Total Acid ◽  
Total Acid Number ◽  
Catalytic Removal ◽  
Al2o3 Catalyst

Petroleomics by electrospray ionization FT-ICR mass spectrometry coupled to partial least squares with variable selection methods: prediction of the total acid number of crude oils

The Analyst ◽  
2014 ◽  
Vol 139 (19) ◽  
pp. 4908-4916 ◽  
Author(s):  
Luciana A. Terra ◽  
Paulo R. Filgueiras ◽  
Lílian V. Tose ◽  
Wanderson Romão ◽  
Douglas D. de Souza ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Variable Selection ◽  
Electrospray Ionization ◽  
Acid Number ◽  
Pls Regression ◽  
Selection Methods ◽  
Total Acid ◽  
Total Acid Number ◽  
Ft Icr Ms ◽  
Ft Icr

FT-ICR MS coupled to PLS regression in petroleomics.

Reduction of the Total Acid Number of Crude Oil with Basic Solution

2007 ◽  
Vol 25 (11) ◽  
pp. 1415-1427 ◽  
Author(s):  
R. J. Lu ◽  
X. R. Xu ◽  
J. Y. Yang ◽  
J. S. Gao
Keyword(s):  
Crude Oil ◽  
Acid Number ◽  
Basic Solution ◽  
Total Acid ◽  
Total Acid Number

Total Acid Number Reduction of Acidic Petroleum Crude Oil by Using 2-Methylimidazole in Polyethylene Glycol and Ca/Al2O3 Catalyst

2021 ◽  
Vol 1025 ◽  
pp. 337-342
Author(s):  
Noraini Safar Che Harun ◽  
Norshahidatul Akmar Mohd Shohaimi ◽  
Shaari Daud
Keyword(s):  
Polyethylene Glycol ◽  
Crude Oil ◽  
Naphthenic Acid ◽  
Acid Number ◽  
Oil Refinery ◽  
Catalyst Loading ◽  
Incipient Wetness Impregnation ◽  
Total Acid ◽  
Calcination Temperatures ◽  
Total Acid Number

The Naphthenic Acid (NA) found in the acidic crude oil is one of the main challenges that can lead to corrosion problem in oil refinery equipment and reduces the quality of the oil. In this study, catalytic neutralization reaction was investigated in order to lowering Total Acid Number (TAN) in crude oil to less than one mg KOH/g utilizing 2-Methylimidazole in Polyethylene Glycol (PEG) with aid of Ca/Al2O3 catalyst. The catalyst were supported on the alumina beads through Incipient Wetness Impregnation (IWI) methods and heated in an oven for 24 hours at 80-90°C then calcined at calcination temperatures of 800, 900 and 1000°C. The result showed that Ca/Al2O3 catalyst successfully reduced to 0.52 mg KOH/g from original TAN value 4.22 mg KOH/g by using a catalyst at calcination temperature 1000°C, 0.39 wt % (7 beads) of catalyst loading and 1000 ppm of 2-Methylimidazole in PEG. It can be concluded that catalytic deacidification method was effective method in reducing NAs from the crude oil and can lowered the TAN value to less than 1 mg KOH/g.

Sign in / Sign up

Export Citation Format

Share Document