Ultra-high molecular weight poly--olefins are widely used as drag reducing agents (DRAs) for pipeline transportation of oil and refined petroleum products. The synthesis of polyolefin DRAs is based on low-temperature ZieglerNatta (ZN) polymerization…
Structural modifications of petroleum pitch and its subfractions induced by mild air-blowing modification have been monitored by elemental analysis, average molecular weight, Fourier transform infrared spectrometer (FTIR),1H nuclear magnetic…
Mesocarbon microbeads (MCMBs) are a valuable carbon material, and the production of this material highly depends on the reaction conditions and feedstock properties. In the present study, supercritical fluid extraction fractionation (SFEF) technology…
Abstract: Influence of the WC/NiCr additive on the cracking of maltenes of naphthenic crude oil from the Usa oil field has been studied. Maltene cracking was carried out at 450 for 2 h in the isothermal mode. Material balance of cracking, the…
After the quinoline insoluble fraction was removed, petroleum pitch (PP) was brominated under ultraviolet light irradiation for 3 to 9 h with a bromine to PP mass ratio of 1:20 to prepare brominated PPs (BPPs). Synthetic pitches (SPs) were produced…
Although condensate oils are neither well defined nor have a known chemical composition, they are considered by the petroleum industry to be good candidates for the dilution of heavy crude oil as this generates a blend with a lower viscosity. This…
Currently, research on oily sludge treatment mainly focuses on optimizing the deoiling effect and research on the deoiling mechanism, and the influence of petroleum components on the properties and treatment of oily sludge is rarely considered.…
Recently, hydrothermal catalytic process in reservoir conditions (in-situ upgrading) has got remarkable attentions. In this study, the feasibility of the in-situ upgrading of Ashalcha crude oil (Tatarstan region, Russia) using steam and catalyst…
The asphaltene aggregates are made of a well-packed and stable in benzene (toluene) solution core and a loose-packed periphery, which can respectively occlude and adsorb the other oil fractions. Previously (Liao et al. Energy Fuels 2005, 180), it was…
Crude oils are generally very complex chemical systems consisting predominantly of hundreds to thousands of hydrocarbon compounds from simple low-molecular-weight paraffin to high-molecular-weight waxes. There are many factors effecting wax…
Petroleum produced from low permeability shales is different to the dispersed in-situ fluids from which it is derived. Whereas in-situ fluids consist of hydrocarbons, resins and asphaltenes in proportions governed by organic matter type, maturity and…
The precise chromatographic isolation of saturates is a common problem of the characterization of highly paraffinic petroleum based samples. Incomplete elution of high-molecular-weight saturates (HMWS) or contamination of saturates by aromatics can…
Bioremediation is a low-cost approach for crude oil spill remediation, but it is often limited by electron acceptor availability. In addition, the biodegradation products of crude oil contaminants are complex, and transformation pathways are…
Molecular profiling of crude oil is a tremendous challenge due to its inherent complexity. An accurate molecular fingerprint of a crude oil may facilitate rational design of crude oil recovery efforts, such as enhanced oil recovery, improve the…
Petroleum produced from low permeability shales is different to the dispersed in-situ fluids from which it is derived. Whereas in-situ fluids consist of hydrocarbons, resins and asphaltenes in proportions governed by organic matter type, maturity and…
Petroleum produced from low permeability shales is different to the dispersed in-situ fluids from which it is derived. Whereas in-situ fluids consist of hydrocarbons, resins and asphaltenes in proportions governed by organic matter type, maturity and…
This work focuses on predicting lean sweet natural gas cricondenbar. This is an important parameter used in predicting the phase envelope, which determines whether the transported gas is in a single gas phase or a two phase (gas and liquid) and in…
This work focuses on predicting lean sweet natural gas cricondenbar. This is an important parameter used in predicting the phase envelope, which determines whether the transported gas is in a single gas phase or a two phase (gas and liquid) and in…
This work focuses on predicting lean sweet natural gas cricondenbar. This is an important parameter used in predicting the phase envelope, which determines whether the transported gas is in a single gas phase or a two phase (gas and liquid) and in…
Polyunsaturated plant oils have gained great interest as monomers to produce biodegradable polymers obtained from renewable resources due to the limited existing sources of petroleum oil and environmental issues. Soybean oil was autoxidized by…
Petroleum produced from low permeability shales is different to the dispersed in-situ fluids from which it is derived. Whereas in-situ fluids consist of hydrocarbons, resins and asphaltenes in proportions governed by organic matter type, maturity and…
In order to limit the greenhouse effect causing climate change and reduce the needs of the transport sector for petroleum oils, transformation of lignocellulosic biomass is a promising alternative route to produce automotive fuels, chemical…
The precise chromatographic isolation of saturates is a common problem of the characterization of highly paraffinic petroleum based samples. Incomplete elution of high-molecular-weight saturates (HMWS) or contamination of saturates by aromatics can…
Two multistage separation techniques have been used to fractionate isotropic petroleum pitches: (1) a stagewise fractionation technique employing sequential, single-stage extractions with supercritical toluene, and (2) dense-gas fractionation with a…
A countercurrent, multistage, dense-gas extraction technique with reflux was investigated for the fractionation of carbonaceous pitches. Two modes of operation were investigated: continuous-stripping and semibatch operation. For example, continuous…
A stagewise fractionation technique employing sequential single-stage extractions with supercritical toluene was used to fractionate the heaviest portion of an isotropic petroleum pitch. Each stage was operated in a region of liquid-liquid…
Nineteen oil samples from Silesian Unit of the eastern Carpathian Overthrust have been characterized geochemically in order to determine the causes of compositional differences among them and elucidating the processes responsible for their…
The self-association of asphaltenes in toluene based on modeling and effect of fractionation with polar solvent was described. Various step-wise models were used to fit calorimetric titration of asphaltenes in dried solutions. Asphaltenes from…
Polycyclic aromatic sulfur heterocycles (PASHs) can show very poor reactivities in catalytic hydrodesulfurization processes in refineries, especially those in high-boiling fractions and distillation residues. An insight into the structural features…
Bioremediation is a low-cost approach for crude oil spill remediation, but it is often limited by electron acceptor availability. In addition, the biodegradation products of crude oil contaminants are complex, and transformation pathways are…
The combination of multistage, dense-gas extraction (DGE) and matrix-assisted, laser desorption/ionization (MALDI) mass spectrometry (MS) was investigated for the fractionation and characterization of an oligomeric model pitch synthesized via the…
We here report the catalytic hydrotreatment of three different Alcell lignin fractions using a Ru/C catalyst in a batch reactor set-up (400 C, 4 h, 100 bar H2 intake, 5 wt% catalyst on lignin). The fractions, obtained by a solvent fractionation…
Supercritical fluid extraction and fractionation (SFEF) has been used to separate a variety of petroleum residua and other heavy oils into narrow-cut fractions with total yields up to 75-90%. Any insoluble material, or end-cut, corresponds to the…
Although the mechanism of cracking of distillate fractions is well-known, the reactions that underlay conversion of the residue fractions of petroleum and bitumen are not well defined. Despite the difficulties in analyzing residue fractions in…
In a manner similar to crude oil, technical lignins need refining if their potential as reactive polyphenols of well-defined molecular weight polymers and oligomers is to be actualized. In this paper, we demonstrate that a continuum of narrow…
Although no commercial oil or gas occurrences have been found in the Barrandian Basin, residual oils and petroleum inclusions give evidence about the petroleum history of this Lower Palaeozoic Basin. Petroleum inclusions are hosted in six generations…
Two chromatographic methods for the SAR (saturates, aromatics, and resins) separation of crude oil samples are compared. Open column chromatography (OPC) using silica and subsequent elution with heptane, toluene, and toluene/methanol is contrasted…
Fractionation of lignocellulosic material into its constitutive components is of vital importance for the production of biofuels as well as other value-added chemicals. The conventional acetosolv processes are mainly focused on the production of pulp…
Dean Stark and Retort are solvent and thermal fluid extraction methods used for evaluating the water and oil content in unconventional reservoir rocks and for calculating their porosity and pore fluid saturations. Unfortunately, they provide…
Recent expansion within the oil sands industry of the Athabasca Basin of Alberta, Canada has led to increased concern regarding process-affected wastewaters produced during bitumen extraction. Naphthenic acids (NAs) have been identified as the…
Open-system pyrolysis experiments were performed on a suite of immature to marginally mature source rocks to investigate the influence of kerogen type on primary gas composition and the effect of grain size on gas expulsion characteristics. The…
In this paper simple estimation methods are presented to predict sulfur weight percentage in petroleum fractions and crude oils. Input data needed to use this method are molecular weight, refractive index, and specific gravity (SG). In cases in which…
Molecular profiling of crude oil is a tremendous challenge due to its inherent complexity. An accurate molecular fingerprint of a crude oil may facilitate rational design of crude oil recovery efforts, such as enhanced oil recovery, improve the…
The utilization of anthropogenic CO2 for enhancing oil recovery while sequestering CO2 in depleted oil and gas fields is increasingly being viewed as an attractive economic proposition for reducing greenhouse gas emissions. Typically, CO2 assisted…
The physical and chemical properties of oil residing in reservoir core samples are strongly susceptible to evaporative processes during storage. In a case study from the Peace River oil sands of Alberta, we performed dead oil viscosity measurements…
The aim of this study was to investigate the improvement in bio-oil stability via hydrodeoxygenation (HDO) with noble metal catalysts. The bio-oil produced by fast pyrolysis was subjected to the hydrodeoxygenative upgrading process with Pd/C, Ru/C,…
The increase in demand for crude oil and the depletion of light crude oil reserves have led to increase in the production of heavy crude oils. This has resulted in an interest in decreasing the pumping costs by techniques such as heating, dilution…
Asphaltene precipitation adversely affects crude oil recovery and transportation. Hence, a precise determination of asphaltene precipitation is of great importance. Development of a scaling equation by Rassamdana et al. and its modifications have…
This work focuses on predicting lean sweet natural gas cricondenbar. This is an important parameter used in predicting the phase envelope, which determines whether the transported gas is in a single gas phase or a two phase (gas and liquid) and in…