scholarly journals Chemical study of asphaltene inhibitors effects on asphaltene precipitation of an Iranian oil field

2020 ◽  
Vol 75 ◽  
pp. 6 ◽  
Author(s):  
Afshar Ahmadbaygi ◽  
Behrouz Bayati ◽  
Mohsen Mansouri ◽  
Hossein Rezaei ◽  
Masoud Riazi
Keyword(s):  
Fourier Transform ◽  
Crude Oil ◽  
Ftir Spectroscopy ◽  
Chemical Structure ◽  
Chemical Study ◽  
Oil Field ◽  
Asphaltene Precipitation ◽  
Spectroscopy Analysis ◽  
Synthetic Oil ◽  
Onset Point

The amount of precipitated asphaltene can be considerably reduced with pretreatment of asphaltene inhibitor, in the crude oil. Efficiency of asphaltene inhibitors mainly depends on some parameters such as pH of the oil and the chemical structure of asphaltene inhibitors. In this paper, the amounts of asphaltene precipitation have been experimentally measured using two n-paraffin precipitants; n-heptane and n-hexane. The performance of the studies on the asphaltene accumulation was studied using Fourier-Transform Infrared (FTIR) Spectroscopy analysis. The onset point has been determined by three different commercial asphaltene inhibitors. The results show that when an asphaltene inhibitor is not injected into the mixture of synthetic oil/n-heptane, AOP (Asphaltene Onset Point) occurs at 35 vol.% of n-heptane, while with addition of 3000 ppm of asphaltene B inhibitor, AOP occurs at 60 vol.% of n-heptane.

A Conversion and Tribology Investigation on Used Ayurvedic Oil

2015 ◽  
Vol 813-814 ◽  
pp. 885-889 ◽  
Author(s):  
Ranganathan Balakumar ◽  
G. Sriram ◽  
S. Arumugam ◽  
V. Abhijith Koushal ◽  
Villa Sai Surya Venkatesh
Keyword(s):  
Fourier Transform ◽  
Methyl Ester ◽  
Ftir Spectroscopy ◽  
Diesel Fuel ◽  
Alternative Fuels ◽  
Fourier Transform Infrared ◽  
Wear Scar ◽  
Spectroscopy Analysis ◽  
Ic Engine ◽  
The Fourier Transform

Biofuel plays a major role in IC engine nowadays. Used Ayurvedic Oil (UAO) is one among the alternative fuels utilized. The preliminary property studies were carried out and the UAO had undergone simple Transesterification process to be converted to Used Ayurvedic Oil Methyl Ester (UAOME). The Fourier Transform Infrared (FTIR) spectroscopy analysis confirmed the UAO to UAOME conversion. The Trobological investigation on UAOME is also conducted using Four Ball Wear Tester. The results showed that lower wear scar was observed in UAOME comparatively with diesel. From the results it is clear that the UAO can be a novel partial substitute for diesel fuel.

Infra-Red Spectroscopy Analysis of Malva Fibers

2014 ◽  
Vol 775-776 ◽  
pp. 255-260 ◽  
Author(s):  
Sergio Neves Monteiro ◽  
Frederico Muylaert Margem ◽  
Jean Igor Margem ◽  
Lucas Barbosa de Souza Martins ◽  
Caroline Gonçalves Oliveira ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Ftir Spectroscopy ◽  
Polymer Composites ◽  
Environmentally Friendly ◽  
Spectroscopy Analysis ◽  
Absorption Bands ◽  
Lignocellulosic Fibers ◽  
Lignocellulosic Fiber ◽  
Synthetic Materials ◽  
Infra Red

The growing interest for natural materials as an environmentally friendly alternative for the substitution of energy intensive and non-sustainable synthetic materials, has motivated the use of lignocellulosic fibers as reinforcement of polymer composites. The malva fiber, a relatively unknown lignocellulosic fiber with potential for composite reinforcement, still needs to be characterized for possible engineer applications. Therefore, the present work analyzed the malva fiber by means of Fourier Transform Infra-red (FTIR) spectroscopy. The malva fiber FTIR spectrum revealed main absorption bands typical of any lignocellulosic fiber. However, some specific bands as well as bands broadening and intensity suggested particular activities for functional molecular groups in the malva fiber.

scholarly journals Dynamics of Changes in Composition and Stability of the Heavy Oil Sampled from the Usinskoye Oil Field as a Result of Formation Treatment with a Sol-Forming EOR System

2019 ◽  
pp. 464-472
Author(s):  
Darya I. Chuikina ◽  
Tatiana V. Petrenko ◽  
Larisa D. Stakhina
Keyword(s):  
Crude Oil ◽  
Oil Recovery ◽  
Heavy Oil ◽  
Oil Field ◽  
Aggregative Stability ◽  
Heavy Oils ◽  
Asphaltene Precipitation ◽  
Liquid Adsorption ◽  
Oil Displacement ◽  
Before And After

The paper deals with a sol-forming system for oil recovery enhancement (EOR system) used to increase the rate of heavy oil displacement. The effect of sol-forming EOR system during the heavy oil displacement on the composition and stability of oil sampled from the Usinskoye oil field of Russia is investigated. The composition of a crude oil also plays an important role in changing its stability. The work is aimed to investigate stability of heavy crude oil in regards to asphaltene precipitation. For asphaltene toluene/n-heptane solutions, the aggregation stability of asphaltenes based on сhange in the optical density with time is investigated via spectrophotometry. SARA analysis is used to characterize the compositions of heavy oils. First, the content of asphaltenes precipitated from the oil samples is determined and then the samples of deasphalted crude oil (maltenes) are analyzed by the method of liquid adsorption chromatography for the purpose to study the composition of oil sampled from the wells before and after their treatment with the sol-forming EOR system. It is found out that the treatment of reservoir crude oil with the sol-forming EOR system results in changes in composition of saturated, aromatic hydrocarbons, resins, and asphaltenes (SARA components) and aggregative stability of produced oil. The results obtained showed that the aggregative stability of heavy oil depends not only on the content of SARA components in the dispersion medium but on the presence of metalloporphyrins in the oil. Metalloporphyrins could act as inhibitors of asphaltene precipitation, which is an additional factor responsible for the stabilization of the oil dispersed system

scholarly journals Modifying an Equation to Predict the Asphaltene Deposition in the Buzurgan Oil Field

2020 ◽  
Vol 21 (4) ◽  
pp. 49-55
Author(s):  
Raad Mohammed Hasan ◽  
Ayad A. Al-haleem
Keyword(s):  
Crude Oil ◽  
Oil Field ◽  
Original Equation ◽  
Instability Index ◽  
Asphaltene Precipitation ◽  
Oil Companies ◽  
Reservoir Rocks ◽  
Reservoir Conditions ◽  
The Difference ◽  
New Equation

Buzurgan oil field suffers from the phenomenon of asphaltene precipitation. The serious negatives of this phenomenon are the decrease in production caused by clogging of the pores and decrease in permeability and wettability of the reservoir rocks, in addition to the blockages that occur in the pipeline transporting crude oil. The presence of laboratories in the Iraqi oil companies helped to conduct the necessary experiments, such as gas chromatography (GC) test to identify the components of crude oil and the percentages of each component, These laboratory results consider the main elements in deriving a new equation called modified colloidal instability index (MCII) equation based on a well-known global equation called colloidal instability index (CII) equation.    The modified (MCII) equation is considered an equation compared to the original (CII) equation because both equations mainly depend on the components of the crude oil, but the difference between them lies in the fact that the original equation depends on the crude oil components at the surface conditions, while the new equation relies on the analysis of crude oil to its basic components at reservoir conditions by using (GC) analysis device.    The components of the crude oil in the reservoir conditions according to the number of carbon atoms of each component compared with the elements of the original equation, which are (saturates, aromatics, resins, and asphaltene).    The new MCII equation helps in predicting the possibility of asphaltene precipitation which can be used and generalized to other Iraqi oilfields as it has proven its worth and acceptability in this study.

scholarly journals Vibrational biospectroscopic study and chemical structure analysis of unsaturated polyamides nanoparticles as anti–cancer polymeric nanomedicines using synchrotron radiation

2018 ◽  
Vol 6 (2) ◽  
pp. 167 ◽  
Author(s):  
Alireza Heidari
Keyword(s):  
Fourier Transform ◽  
Synchrotron Radiation ◽  
Ftir Spectroscopy ◽  
Chemical Structure ◽  
Fourier Transform Infrared ◽  
Considerable Change ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Anti Cancer ◽  
Before And After

Firstly, unsaturated polyamides nanoparticles were hardened by continuous synchrotron radiation and then, the induced changes in its chemical structure were studied by Attenuated Total Reflection–Fourier Transform Infrared (ATR–FTIR) spectroscopy. It was shown that applying synchrotron radiation for hardening not only leads to reduction of hardening time but also creates cross link in polymer by breaking Carbon–Carbon double bond, without any considerable change in its chemical structure. In addition, an unsaturated polyamide nanoparticle as anti–cancer polymeric nanomedicines is hardened by synchrotron radiation. Its chemical structure before and after hardening is studied using Raman and Attenuated Total Reflection–Fourier Transform Infrared (ATR–FTIR) spectroscopy. The results show that Raman spectroscopy is considerably better than Attenuated Total Reflection–Fourier Transform Infrared (ATR–FTIR) spectroscopy in detecting the changes happened in chemical structure.  

Importance of Glucose and Pseudomonas in Producing Degradable Plastics

2014 ◽  
Vol 69 (5) ◽  
Author(s):  
Farzaneh Sabbagh Mojaveryazdi ◽  
Ida Idayu Muhamad ◽  
Shahabaldin Rezania ◽  
Hiro Benham
Keyword(s):  
Fourier Transform ◽  
Absorption Band ◽  
Ftir Spectroscopy ◽  
Growth Parameters ◽  
Carbon Sources ◽  
Spectroscopy Analysis ◽  
Surface Method ◽  
Stretching Vibration ◽  
Degradable Plastics ◽  
Pha Production

In this study, bacteria, P. oleovorans, was studied for its ability to produce PHA with glucose, fructose and sucrose as carbon sources that was grown at 25°C. The functional groups of the extracted PHA granules were identified as C=O group by Fourier transform Iinfrared (FTIR) spectroscopy analysis. The drastic absorption band at approximately 1720 cm‒1 indicates the stretching vibration of the C=O groups in the PHA polyester. The optimized production of PHA was done by RSM (Response Surface Method) through various growth parameters. The best condition of productivity range for glucose is 93.4419 g/L. In addition, the highest PHA production after optimization is 2.28236 g/L with a desirability of 0.986 g/L, meanwhile the highest amount of PHA produced from P. oleovorans was 2.30 g/L. 

Analysis of SCS-6 silicon carbide fibers by Fourier transform infrared spectroscopy

1997 ◽  
Vol 12 (2) ◽  
pp. 329-331
Author(s):  
S. Krishnamurthy
Keyword(s):  
Silicon Carbide ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Ftir Spectroscopy ◽  
Fourier Transform Infrared ◽  
Spectroscopy Analysis ◽  
Silicon Carbide Fibers ◽  
Low Levels ◽  
Reported Data ◽  
No Absorption

Fourier transform infrared (FTIR) spectroscopy analysis of SCS-6 silicon carbide fibers was performed to detect the presence of oxygen in the form of SiO2. The results showed infrared peaks corresponding to SiC fundamental lattice absorption as well as reflection. No absorption peak due to SiO2 was observed. These results are in agreement with previously reported data indicating low levels of oxygen in this fiber.

Synthesis of Ag-Hydroxyapatite

2016 ◽  
Vol 720 ◽  
pp. 234-238
Author(s):  
Flavia Mendonça Fonseca ◽  
Andrea Machado Costa ◽  
Rubens Lincoln Santana Blazutti Marçal ◽  
Daniel Navarro da Rocha ◽  
José Brant de Campos ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Ftir Spectroscopy ◽  
Grain Growth ◽  
Sem Analysis ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Spectroscopy Analysis ◽  
X Ray ◽  
Heat Treated ◽  
Xrd Patterns

Silver-bioceramics have a great potential to optimize the bone grafts materials to avoid microorganism infections on patients. The present study synthesized and characterized hydroxyapatite doped with silver (Ag), by an acidic route of precipitation method, and the proposal of the Ag-HA synthesis is to promote the bioactivity and bactericidal ability with less toxicity for organism. The samples were analyzed by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy analysis. There was a pronounced grain growth after 1100°C HA and AgHA heat treatments for both HA and Ag-HA powders, observed by FEG-SEM analysis. XRD patterns of AgHA sintered at 1100°C showed HA as the main phase, but also a secondary whitlockite phase. However, 100% HA was observed for the Ag-HA samples heat treated at 700°C and 900°C. However, pure HA showed decomposition at 900°C. The acidic route of precipitation method showed to be effective for silver-doped hydroxyapatite production.

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