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B. B. Adeleke

Bio: B. B. Adeleke is an academic researcher from University of Ibadan. The author has contributed to research in topics: Radical & Docking (molecular). The author has an hindex of 9, co-authored 25 publications receiving 239 citations.

Papers
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TL;DR: In this paper, a detailed geochemical study of oil samples from an onshore field in the Niger Delta was carried out for their characterization and correlation using Gas Chromatographic (GC), GC-MS, and Inductively Coupled Plasma-Mass Spectrometric (ICP-MS) analytical techniques.
Abstract: A detailed geochemical study of oil samples from an onshore field in the Niger Delta was carried out for their characterization and correlation. The samples were analyzed using Gas Chromatographic (GC), Gas Chromatographic-Mass Spectrometric (GC-MS) and Inductively Coupled Plasma-Mass Spectrometric (ICP-MS) analytical techniques. The results showed that CPI, Pr/Ph, Pr/nC17, Ph/nC18 and odd/even ratios ranged from 0.91 to 1.17, 3.07 to 6.04, 0.39 to 0.80, 0.14 to 3.30 and 1.33 to 1.39 respectively. The concentration levels of Co, Cr, Cu, Fe, Ni and V ranged from 0.9 to 32, 6.2 to 24, 3.31 to 19.4, 11.4 to 1241, 26.3 to 144 and 11.0 to 29.7 pbb respectively. The Pr/nC17 vs. Ph/nC18 plot revealed two oil types; non-degraded and minor degraded oils, which were derived from organic matter deposited in transitional environments. This suggests that both oil types have identical source rocks. Also, CPI values of 0.91 to 1.17 indicated that the oils are thermally mature. Biomarker data also discriminated the oils into two groups on the basis of biodegradation and revealed that the oils are mature and generated at almost the same thermal maturity level. The results of Ni vs. V, Co/Ni vs. V/Ni cross plots and cluster analysis similarly revealed identical two oil types. The similarity in the results of both organic and inorganic geochemistry of these oils shows that an integrated organic and inorganic geochemical data provide a reliable tool for the evaluation, characterization and correlation of crude oils.

83 citations

Journal ArticleDOI
TL;DR: In this article, thirty four shale samples from the Tertiary Agbada Formation were analyzed for TOC and Rock-Eval pyrolysis parameters in order to evaluate the effect of oil-based mud contamination on source-rock characterization.
Abstract: Thirty four shale samples from the Tertiary Agbada Formation were analysed for TOC and Rock-Eval pyrolysis parameters in order to evaluate the effect of oil-based mud contamination on source-rock characterization. The samples were obtained from five wells in the offshore Niger Delta over a depth range of 5,460ft to 11,580ft. The results indicated that the raw (unextracted) samples were dominated by Type III kerogen. However, after extraction, both Types II/III and III kerogen were identified, consistent with previous studies. These results demonstrate that it is essential that shale samples should be extracted prior to TOC and Rock-Eval pyrolysis for accurate source-rock evaluation.

34 citations

Journal Article
TL;DR: In this paper, the inhibiting activity of three sets of organic compounds (2,3-dihydroxypropyl)sulfanyl]-N-octylacetamide (DSO), 2-[(2, 3ddihdioxypyl)-sulfanolamide(SSA)-N-decylacetamides (DSD) and 2, 3-dhydroxpropyl]-SSA-SSA (DSDD) were studied and sites for nucleophilic and electrophilic attacks for DSO were observed.
Abstract: The inhibiting activity of 3 sets of organic compounds ([2-[(2,3-dihydroxypropyl)sulfanyl]-N-octylacetamide (DSO), 2-[(2,3-dihydroxypropyl)sulfanyl]-N-decylacetamide (DSD) and 2-[(2,3-dihydroxypropyl)sulfanyl]-N-dodecylacetamide (DSDD)) were studied. The studied anti-corrosion compounds i.e. 2,3-dihydroxypropyl-sulfanyl derivatives were calculated using quantum chemical calculation and several descriptors (highest occupied molecular orbital energy (EHOMO), lowest unoccupied molecular orbital energy (ELUMO) and chemical reactivity indices (global electrophilicity index (ω), chemical hardness (η), electronegativity (χ), local reactivity index, electron affinity and ionization potential) which described the anti-corrosion properties of the studied compounds were obtained. Fukui Indices for nucleophilic and electrophilic Attacks for inhibitors i.e. [2-[(2,3dihydroxypropyl)sulfanyl]-N-octylacetamide (DSO), 2-[(2,3-dihydroxypropyl)sulfanyl]-Ndecylacetamide (DSD) and 2-[(2,3-dihydroxypropyl)sulfanyl]-N-dodecylacetamide (DSDD) were observed and sites for nucleophilic and electrophilic attacks for DSO were C6 (0.047) and O3 (0.170); for DSD, the utmost value for was found on C6 (0.047), and the highest value for was located on C5 with 0.099 while the greatest value for was situated on C6 with 0.047 and the highest value for is found on C3 and C4 with 0.053 each for the DSDD molecule. The molecules used in this study was calculated using quantum chemical calculation and it was achieved using Spartan 14. More so, the QSAR study using multiple linear regression method was executed using Gretl 1.9.8. The selected descriptors among the entire calculated descriptors were used in the development of quantitative structural activity relationship (QSAR) model and the developed model replicated the observed %IE. The correlation coefficient (R 2 ) was calculated to be 0.926, cross validation (CV.R 2 ) was 0.963 and adjusted R 2 was 0.852. Also, ELUMO was the predominating parameter in the corrosion inhibition property of the studied compounds. Received: August 23, 2018. Published: October 24, 2018 doi: 10.17675/2305-6894-2018-7-4-2 Int. J. Corros. Scale Inhib., 2018, 7, no. 4, 498–508 499

29 citations

Journal ArticleDOI
TL;DR: In this article, a suite of oil samples from an onshore-swamp field in the northwestern Niger Delta was analyzed using whole oil gas chromatography to correlate the oils and to evaluate post generative alterations using light hydrocarbons.

29 citations

Journal ArticleDOI
TL;DR: In this article, the geometric, thermodynamic, electronic and absorption properties of Pyrrole and some of its derivatives have been carried out using CCSD/6-311++G(d,p)/STO-3G, TD-DFT and DFT/B3LYP/6 -31g(d) from monomer to five repeating units.
Abstract: The geometric, thermodynamic, electronic and absorption properties of Pyrrole and some of its derivatives have been carried out using CCSD/6-311++G(d,p)/STO-3G, TD-DFT and DFT/B3LYP/6-31G(d) from monomer to five repeating units. Substitution by a methyl group at C3 and functional groups at C4 cause small changes in atomic distances. The estimated inter-ring bond length based on Badger's rule of 1.41 A indicates that the average structure is about 30% quinoid. The geometries indicates that strong conjugate effects and effective aromatic structure are formed in the order Pyrrole>MPCam>MPC. The oligomers of simulated compounds have been extrapolated to polymer through second-degree polynomial-fit equation with r2 value ranging from 0.96-0.99. Calculated band gap of pyrrole, which is 2.9 eV, significantly correlates with the experimental value which ranges from 2.9-3.2 eV and this corresponds to π-π* transition energies. Natural bond orbitals of polypyrrole reveals that the wavefunctions contain dynamic correlations (single reference), closed shell character while substituted polypyrrole are multireference (static correlation), open shell character.

17 citations


Cited by
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TL;DR: A survey of anion radical ligands and their complexes can be found in this article, where anion radicals and their properties are discussed as well as the properties of the ligands.

331 citations

Journal ArticleDOI
TL;DR: This review summarizes the sample preparation methods for metals and non metals determination in crude oil including those based on wet digestion, combustion, emulsification, extraction, sample dilution with organic solvents, among others.

111 citations

Journal ArticleDOI
TL;DR: Radionuclide concentrations in samples of the local foodstuffs and in water samples collected in Bisichi were found to be higher than UNSCEAR reference values, revealing the pollution potential of the mining activities on the surrounding areas.

91 citations