Spectroscopic Analysis of Crude Oil Asphaltenes at Molecular Level

Ok, Salim; Rajasekaran, Navvamani; Sabti, Mohamed A.; Joseph, Georgekutty

doi:10.1134/s0965544120070117

Cited by 16 publications

(26 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1 Samples 1, 2, and 3 of the current study were samples 2, 4, and 5, respectively, in the two previous reports. 1,16 Sample 1 was extracted from a heavy crude oil with API gravity of 12.40, whereas samples 2 and 3 were derived from light crude oils with API gravity of 36.80 and 37.88, respectively. The other physical properties of crude oils can be found in the previous reports.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…15 On the other hand, one of the major differences is the average size, where sample 1 extracted from a heavy crude oil has smaller size than samples 2 and 3 from light crude oils. 16 The other important difference is the functional groups such as −CO varying from one sample to the other. This difference has significance in explaining cross-linking of polyaromatics with different functional groups attached.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Upon basic characterization of crosslinked asphaltenes by spectroscopic methods, the results of cross-linked samples are compared to those of parent asphaltene samples without any cross-linking. 16 Then, we analyze the porosity and surface area of the cross-linked asphaltene samples. Finally, we suggest a model of cross-linked network structure explaining the nonstacking nature of the resultant material.…”

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Obtaining Nanoporous Polycyclic Aromatic Hydrocarbon Networks by Cross-Linking Asphaltenes

Samuel

2021

Energy Fuels

View full text Add to dashboard Cite

The complexity in the chemical structure of asphaltenes has the potential to be utilized in generating novel materials. In the present study, three different asphaltene samples derived from heavy and light crude oils are cross-linked in a chlorinated solvent. Diffuse reflectance infrared Fourier transform spectroscopy was used for the identification of functional groups and aliphatic-to-aromatic ratios type index values of cross-linked asphaltenes. Raman spectra of asphaltenes showed an increase in average molecular dimensions of cross-linked asphaltenes compared to the original asphaltenes without cross-linking. A porous network-type structure is proposed for explaining the structure of the cross-linked asphaltenes, and this is revealed by surface area analysis. It seems that it is possible to cross-link asphaltenes independent of their geographical origin. The experimental procedure here could be applied for similar materials as well. The cross-linked asphaltenes with porous network-type structure might act as a precursor material for making activated porous carbons, a carbonaceous scaffold for synthesizing novel materials in the confined state, and for modifying surfaces of nanomaterials.

show abstract

Section: ■ Materials and Methodsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Obtaining Nanoporous Polycyclic Aromatic Hydrocarbon Networks by Cross-Linking Asphaltenes

Samuel

2021

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…For the petrochemical and oil-refining industries to be permanently in the spotlight of countries with rich oil fields, it is required to develop fundamental and applied research in the field of studying the primary and secondary products of oil refining. Currently, these studies are carried out with the widespread use of novel high-sensitive, modern spectral analysis methods (UV-, IR-, NMR-, EPR-and chromatomass spectroscopy and luminescence) [2,22,24] and thermal devices (DSC, DTA, etc.) [8,17], which allows us to fully explain the processes of photophysical and photochemical transformations in the structural group of oil products as well as clarification of their kinetics, the elementary steps and their mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Photochemical investigation of aromatic hydrocarbons of Balakhani crude oil as petroleum luminophores

et al. 2020

View full text Add to dashboard Cite

In this paper, the photochemical conversion process of aromatic hydrocarbons in Balakhani oil well (BO) as a case study was investigated. To study the composition of BO, first, it has been separated into the first, second, third, and fourth groups of aromatics using chromatography absorption column. It has been established that the composition of the separated groups is mainly composed of mono-, tri-, and tetracyclic aromatic hydrocarbons. It has been shown that the optical densities of the absorption bands corresponding to bi-, tri-, and polycyclic aromatic hydrocarbons decrease with increasing the photo-irradiation period, hence their maximum absorption band undergoes the hypsochromatic shift, which is characteristic for electron donor substances. It has been determined that the photochemical conversion process in the sample oil (BO) occurs with radical-chain and molecular mechanisms. As a result of the photochemical conversion process of arene-type aromatic hydrocarbons, the first difference during the photooxidation of endoperoxides, hydroxynones, quinones, and phenes is the formation of cyclic peroxides and quinones.

show abstract

“…Another important aspect of OCC formation is whether the crude oil contains high-molecular-weight heterocyclic nitrogen compounds [46], which are capable of forming salts when reacting with hydrochloric acid (Scheme 4).…”

mentioning

confidence: 99%

Genesis of Organochlorine Compounds in Crude Oil and Petroleum Products (A Review)

et al. 2021

View full text Add to dashboard Cite

This review systematizes and summarizes the available published data on the genesis, nature, and structure of organochlorine compounds (OCCs) detected in crude oil and petroleum products. The main aspects related to the sources of chloride formation in crude oil are discussed. It is demonstrated that the abnormal manifestations of OCCs in crude oil are associated with the artificial addition of chemicals that contain OCCs and/or their precursors as well as with the application of hydrochloric acid mixtures to intensify oil inflow.

show abstract

Spectroscopic Analysis of Crude Oil Asphaltenes at Molecular Level

Cited by 16 publications

References 22 publications

Obtaining Nanoporous Polycyclic Aromatic Hydrocarbon Networks by Cross-Linking Asphaltenes

Obtaining Nanoporous Polycyclic Aromatic Hydrocarbon Networks by Cross-Linking Asphaltenes

Photochemical investigation of aromatic hydrocarbons of Balakhani crude oil as petroleum luminophores

Genesis of Organochlorine Compounds in Crude Oil and Petroleum Products (A Review)

Contact Info

Product

Resources

About