Results 51 to 60 of about 2,348 (179)

Multivariate Optimization of Column Liquid Chromatography for the Separation of Saturated, Aromatic, and Acidic Biomarkers in Petroleum and Rock Extracts

Journal of Chemometrics, Volume 40, Issue 2, February 2026.
ABSTRACT Conventional geochemical biomarkers include saturated, aromatic, and carboxylic acid compounds. Saturated and aromatic biomarkers, however, form the foundation of many geochemical studies because of their abundance and intrinsic significance.
Alek A. C. de Sousa, Wandreson dos S. Sousa, Alexandre A. de Souza, Pedro H. B. Lima, Henrique A. Lopes, Wilkins O. de Barros, Benedito B. Farias Filho, Sidney G. de Lima   +7 more
wiley   +1 more source

Experimental methods in chemical engineering: Electrospinning

The Canadian Journal of Chemical Engineering, Volume 104, Issue 2, Page 556-568, February 2026.
Abstract Electrospinning produces micro‐ and nanofibres by forcing a polymeric solution through a fine needle in an electric field that produces a filament that accumulates onto a collector plate. The fibre morphology depends on solution properties, distance between needle and plate, feed rate, and electric field intensity.
M. Olga Guerrero‐Pérez, Tugce N. Eran, Gregory S. Patience   +2 more
wiley   +1 more source

Bitumen Emulsion—Mineral Surface Interactions: An NMR Study on the Interface Layer Composition

Magnetic Resonance in Chemistry, Volume 64, Issue 2, Page 170-178, February 2026.
We describe a 1H NMR approach to study the interface layer formed by a specified bitumen emulsion in the presence of non‐magnetic as well as magnetic minerals. This approach is based on the consecutive flushing off “bulky” components of the bitumen emulsion and the following extraction of the surface layer material, which can then be analyzed by NMR ...
Andrei Filippov, Hilde Soenen, Oleg N. Antzutkin   +2 more
wiley   +1 more source

Reconstructing Environmental and Microbial Ecosystem Changes Across the Permian–Triassic Mass Extinction at Lusitaniadalen, Svalbard

Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract The Permian–Triassic environmental crisis triggered fundamental changes in marine ecosystems, culminating in the most severe biodiversity crisis of the Phanerozoic. Yet, the environmental and geochemical conditions governing the crisis and ecosystem recovery remain debated.
S. Z. Buchwald, A. B. Frank, D. Birgel, K. Senger, T. Mosociova, Y. Pei, B. Beaty, L. G. Tarhan, F. Galasso, M. A. Gómez Correa, S. E. Grasby, U. Struck, D. Yuan, R. Steinkrauss, J. Gliwa, N. Lahajnar, J. Peckmann, W. J. Foster   +17 more
wiley   +1 more source

Influence of asphaltene precipitation on development effect of typical heavy oil reservoirs in eastern South China Sea

Youqi dizhi yu caishoulu
During the development of heavy oil reservoirs in the eastern South China Sea， asphaltene precipitation can cause blockages in reservoir throats， wellbores， and pipelines， leading to a decrease in the productivity of oil wells.
TU Yi, DAI Jianwen, YANG Jiao, WANG Yahui, MIAO Yun, ZHONG Xulin   +5 more
doaj   +1 more source

Effects of hydrophobic CaO and SiO2 nanoparticles on Asphaltene Precipitation Envelope (APE): an experimental and modeling approach

Oil & Gas Science and Technology, 2018
An experimental and modeling approach was developed in this research to investigate the effects of CO2, new synthesized CaO and commercial SiO2 nanoparticle concentrations on the Asphaltene Precipitation Envelope (APE).
Ahmadi Yaser, Aminshahidy Babak
doaj   +1 more source

Numerical Validation of Asphaltene Precipitation and Deposition during CO2 miscible flooding

Petroleum Research, 2020
Asphaltene precipitation, flocculation, and deposition can significantly reduce oil production by impacting wellbores, flowlines, and more importantly, formations’ pore space around the well.
Fahad I. Syed, Shahin Neghabhan, Arsalan Zolfaghari, Amirmasoud K. Dahaghi   +3 more
doaj   +1 more source

Evaluation of the Influence of Antifoam Formulations on Asphaltene Aggregates Using AFM and SEM‐EDS

Journal of Applied Polymer Science, Volume 143, Issue 3, January 15, 2026.
ABSTRACT Asphaltenes, naturally occurring surfactants in crude oil play a pivotal role in stabilizing oily foams during primary oil processing. Accordingly, understanding how antifoam formulations influence asphaltene aggregation is essential. This study investigates the effect of polydimethylsiloxane (PDMS) with varying molar masses on asphaltene ...
Mariana Teixeira Mendes, Andressa Oliveira dos Santos, Rafael Farias Perez, Osvaldo Karnitz Junior, Claudia Regina Elias Mansur   +4 more
wiley   +1 more source

Asphaltene Stability of Some Iraqi Dead Crude oils

Journal of Engineering, 2019
Asphaltene is one of the fractions of the crude oil which is soluble in aromatics such as benzene or toluene and insoluble in alkane such as n-heptane, n-pentane or petroleum ether (mixture of alkane compounds).
Ali Anwar Ali, Mohammed S. Al-Jawad, Abdullah A. Ali   +2 more
doaj   +1 more source

Enhancing asphaltene precipitation modeling by cubic-PR solid model using thermodynamic correlations and averaging techniques

Petroleum Science, 2019
Cubic equation-of-state solid models are one of the most widely used models to predict asphaltene precipitation behavior. Thermodynamic parameters are needed to model precipitation under different pressures and temperatures and are usually obtained ...
Aktham E. Shoukry, Ahmed H. El-Banbi, Helmy Sayyouh   +2 more
doaj   +1 more source