A Numerical Assessment of Carbon-Dioxide-Rich Two-Phase Flows with Dense Phases in Offshore Production Pipelines

SPE Journal ◽  
2020 ◽  
Vol 25 (02) ◽  
pp. 712-731 ◽  
Author(s):  
Marcelo de A. Pasqualette ◽  
João N. E. Carneiro ◽  
Stein Tore Johansen ◽  
Bjørn Tore Løvfall ◽  
Roberto Fonseca ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Pressure Gradient ◽  
Crude Oil ◽  
Temperature Drop ◽  
Density Ratio ◽  
Flow Simulation ◽  
Phase Identification ◽  
Liquid Density ◽  
Dense Phase ◽  
Offshore Production

Summary One-dimensional numerical simulations of carbon dioxide (CO2)-rich crude-oil flows were performed with a commercial simulator for a typical offshore production pipeline under steady-state scenarios. Mixtures with 20–50 mol% CO2 and gas/oil ratio (GOR) of 300–600 std m3/std m3 were thermodynamically modeled with the predictive Peng-Robinson (PPR78) equation of state (EOS) (Robinson and Peng 1978; Jaubert and Mutelet 2004), and fluid properties were tabulated in pressure/volume/temperature (PVT) lookup tables. Thorough analyses on the separate CO2 and GOR effects on several flow parameters (e.g., temperature drop, pressure gradient, and flow patterns) were performed. The occurrence of the simultaneous flow of liquid and an ambiguous dense phase was quantified and discussed in depth. The properties of those phases [e.g., Joule-Thomson coefficient, viscosity, interfacial tension (IFT), and gas/liquid-density ratio] along the pipeline for several mixtures and operational conditions were addressed as well. It was seen that the dense phase can be a problem for phase-identification criteria, which can affect the flow-simulation results. This was further analyzed in simple cases of horizontal and vertical flows of CO2-rich crude-oil mixtures, under key temperature/pressure conditions. Finally, comparisons were performed between the holdup and pressure-gradient results of those cases, obtained with different liquid/liquid- and gas/liquid-modeling approaches of a hydrodynamic point model of a commercial simulator.

Assessment of Failure Frequency Methodology Applied to Dense Phase Carbon Dioxide Pipelines

2019 ◽  
Author(s):  
Christopher Lyons ◽  
Julia Race ◽  
Ben Wetenhall ◽  
Enrong Chang ◽  
Harry Hopkins ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Dense Phase ◽  
Failure Frequency

Separation of Methane from Shuttle Tanker Vents Gases by Adsorption on a Polyurethane/Zeolite Membrane

2017 ◽  
Vol 733 ◽  
pp. 42-46
Author(s):  
Habiba Shehu ◽  
Edidiong Okon ◽  
Edward Gobina
Keyword(s):  
Carbon Dioxide ◽  
Physical Properties ◽  
Crude Oil ◽  
Deep Water ◽  
Separation Factor ◽  
Gas Permeation ◽  
Zeolite Membrane ◽  
Alumina Support ◽  
Molar Flux

Shuttle tankers are becoming more widely used in deep water installations as a means of transporting crude oil to storage plants and refineries. The emissions of hydrocarbon vapours arise mainly during loading and offloading operations. Experiments have been carried out on the use of polyurethane/zeolite membrane on an alumina support for the separation of methane from carbon dioxide and oxygen. The physical properties of the membrane were investigated by FTIR. Single gas permeation tests with methane, propane, oxygen and carbon dioxide at a temperature of 293 K and pressure ranging from 0.1 to 1.0 x 10-5 Pa were carried out. The molar flux of the gases through the membrane was in the range of 3 x 10-2 to 1 x 10-1 molm-2s-1. The highest separation factor of CH4/CO2 and CH4/O2 and CH4/C3H8 was determined to be 1.7, 1.7 and 1.6 respectively.

Polymers with Multiple Ligand Sites for Metal Extractions in Dense-Phase Carbon Dioxide†

2001 ◽  
Vol 40 (5) ◽  
pp. 1301-1305 ◽  
Author(s):  
Kimberly R. Powell ◽  
T. Mark McCleskey ◽  
William Tumas ◽  
Joseph M. DeSimone
Keyword(s):  
Carbon Dioxide ◽  
Dense Phase ◽  
Multiple Ligand

Nonlinear instability of plane liquid sheets

2000 ◽  
Vol 406 ◽  
pp. 281-308 ◽  
Author(s):  
SEYED A. JAZAYERI ◽  
XIANGUO LI
Keyword(s):  
Weber Number ◽  
Density Ratio ◽  
Perturbation Expansion ◽  
Liquid Sheet ◽  
Fundamental Wave ◽  
Liquid Density ◽  
Initial Amplitude ◽  
Nonlinear Stability Analysis ◽  
Liquid Sheets ◽  
Breakup Time

A nonlinear stability analysis has been carried out for plane liquid sheets moving in a gas medium at rest by a perturbation expansion technique with the initial amplitude of the disturbance as the perturbation parameter. The first, second and third order governing equations have been derived along with appropriate initial and boundary conditions which describe the characteristics of the fundamental, and the first and second harmonics. The results indicate that for an initially sinusoidal sinuous surface disturbance, the thinning and subsequent breakup of the liquid sheet is due to nonlinear effects with the generation of higher harmonics as well as feedback into the fundamental. In particular, the first harmonic of the fundamental sinuous mode is varicose, which causes the eventual breakup of the liquid sheet at the half-wavelength interval of the fundamental wave. The breakup time (or length) of the liquid sheet is calculated, and the effect of the various flow parameters is investigated. It is found that the breakup time (or length) is reduced by an increase in the initial amplitude of disturbance, the Weber number and the gas-to-liquid density ratio, and it becomes asymptotically insensitive to the variations of the Weber number and the density ratio when their values become very large. It is also found that the breakup time (or length) is a very weak function of the wavenumber unless it is close to the cut-off wavenumbers.

NEAR CRITICAL CARBON DIOXIDE FRACTIONATION OF CRUDE OIL I: DEPENDENCE OF THE MOLECULAR UEIGHT OF THE FRACTIONS ON THE PRESSURE USED.

1989 ◽  
Vol 7 (2) ◽  
pp. 207-215
Author(s):  
Dhia M. Kassim ◽  
Mustafa M.F. Al-Jarrah ◽  
Rita L. Apikian ◽  
Sondus A. Al-Asaf
Keyword(s):  
Carbon Dioxide ◽  
Crude Oil ◽  
Critical Carbon Dioxide

scholarly journals Rheological and Emulsification Behavior of Xinjiang Heavy Oil and Model Oils

2016 ◽  
Vol 9 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Jiaqiang Jing ◽  
Jiatong Tan ◽  
Haili Hu ◽  
Jie Sun ◽  
Peiyu Jing
Keyword(s):  
Pressure Gradient ◽  
Crude Oil ◽  
Mineral Oil ◽  
Crude Oils ◽  
Water Separation ◽  
Oil Emulsion ◽  
Silicon Oil ◽  
Oil Water ◽  
Model Oil ◽  
White Mineral

Transparent model oils are commonly used to study the flow patterns and pressure gradient of crude oil-water flow in gathering pipes. However, there are many differences between the model oil and crude oils. The existing literatures focus on the flow pattern transition and pressure gradient calculation of model oils. This paper compares two most commonly used model oils (white mineral oil and silicon oil) with Xinjiang crude oil from the perspectives of rheological properties, oil-water interfacial tensions, emulsion photomicrographs and demulsification process. It indicates that both the white mineral oil and the crude oils are pseudo plastic fluids, while silicon oil is Newtonian fluid. The viscosity-temperature relationship of white mineral oil is similar to that of the diluted crude oil, while the silicon oil presents a less viscosity gradient with the increasing temperature. The oil-water interfacial tension can be used to evaluate the oil dispersing ability in the water phase, but not to evaluate the emulsion stability. According to the Turbiscan lab and the stability test, the model oil emulsion is less stable than that of crude oil, and easier to present water separation.

scholarly journals Analysis of monthly CO2 emission trends for major EU Countries: a time series approach

2021 ◽  
Author(s):  
Marco Quatrosi
Keyword(s):  
Carbon Dioxide ◽  
Crude Oil ◽  
Carbon Dioxide Emissions ◽  
Structural Breaks ◽  
Carbon Dioxide Emission ◽  
Diesel Oil ◽  
Hard Coal ◽  
Eu Countries ◽  
Greenhouse Gasses ◽  
Time Series Approach

<p>The following paper analyses monthly trends for CO<sub>2 </sub>emissions from energy consumption for 31 European countries, four primary fuels (i.e., Crude Oil, Natural Gas, Hard Coal, Lignite) and three secondary fuels (i.e., Gas/Diesel Oil, LPG, Naphta, Petroleum Coke) from 2008 to 2019. Carbon dioxide emission has been estimated following the Reference Approach in the 2006 IPCC Guidelines for National Greenhouse Gasses Inventories. Country-specific (e.g. Tier 2) coefficient were retrieved from the IPCC Emission Factor Database and the UN Common Reporting Framework. Data on fuel consumption (e.g., Gross Inland Deliveries) were taken from the Eurostat database. This paper will fill some knowledge gap analysing monthly trends of carbon dioxide emissions for major EU Countries. As the progressive phase-out of carbon is taking place pretty much in all Europe, Crude Oil exerted the largest amount of carbon dioxide emissions in the period considered. Analysis of selected countries unveiled several clusters within the EU in terms of major source of emissions. As final step, the paper has endeavoured the task of fitting a model for monthly CO<sub>2 </sub>forecasting. The whole series presents two structural breaks and can be explained by an autoregressive model of the first order. Indeed, further speculations on a more appropriate fit and more fuels in the estimation, is demanded to other works.</p>

ChemInform Abstract: Heterogeneous Catalysis for Fine Chemicals in Dense Phase Carbon Dioxide

ChemInform ◽  
2008 ◽  
Vol 39 (19) ◽  
Author(s):  
Rosaria Ciriminna ◽  
Massimo L. Carraro ◽  
Sandro Campestrini ◽  
Mario Pagliaro
Keyword(s):  
Carbon Dioxide ◽  
Heterogeneous Catalysis ◽  
Fine Chemicals ◽  
Dense Phase
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