Experimental Study of Solubility of Natural Gas Components in Aqueous Solutions of Ethylene Glycol at Low-Temperature and High-Pressure Conditions

2007 ◽  
Vol 52 (5) ◽  
pp. 1741-1746 ◽  
Author(s):  
Majid Abedinzadegan Abdi ◽  
Arshad Hussain ◽  
Kelly Hawboldt ◽  
Erika Beronich
Keyword(s):  
Experimental Study ◽  
High Pressure ◽  
Low Temperature ◽  
Natural Gas ◽  
Ethylene Glycol ◽  
Aqueous Solutions

scholarly journals Rheology of THF hydrate slurries at high pressure

2020 ◽  
Vol 75 ◽  
pp. 16
Author(s):  
Paulo H. de Lima Silva ◽  
Mônica F. Naccache ◽  
Paulo R. de Souza Mendes ◽  
Adriana Teixeira ◽  
Leandro S. Valim
Keyword(s):  
High Pressure ◽  
Low Temperature ◽  
Natural Gas ◽  
Deep Water ◽  
Flow Behavior ◽  
Oil Industry ◽  
Production Lines ◽  
Oil Emulsions ◽  
Slurry Viscosity ◽  
Financial Losses

One of the main issues in the area of drilling and production in deep and ultra-deep water in the oil industry is the formation of natural gas hydrates. Hydrates are crystalline structures resembling ice, which are usually formed in conditions of high pressure and low temperature. Once these structures are formed, they can grow and agglomerate, forming plugs that can eventually completely or partially block the production lines, causing huge financial losses. To predict flow behavior of these fluids inside the production lines, it is necessary to understand their mechanical behavior. This work analyzes the rheological behavior of hydrates slurries formed by a mixture of water and Tetrahydrofuran (THF) under high pressure and low temperature conditions, close to the ones found in deep water oil exploration. The THF hydrates form similar structures as the hydrates originally formed in the water-in-oil emulsions in the presence of natural gas, at extreme conditions of high pressure and low temperature. The experiments revealed some important issues that need to be taken into account in the rheological measurements. The results obtained show that the hydrate slurry viscosity increases with pressure. Oscillatory tests showed that elasticity and yield stress also increase with pressure.

scholarly journals Kinetic and Thermodynamic Analysis of High-Pressure CO2 Capture Using Ethylenediamine: Experimental Study and Modeling

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6822
Author(s):  
Josselyne A. Villarroel ◽  
Alex Palma-Cando ◽  
Alfredo Viloria ◽  
Marvin Ricaurte
Keyword(s):  
Experimental Study ◽  
High Pressure ◽  
Aqueous Solutions ◽  
Thermodynamic Analysis ◽  
Co2 Capture ◽  
Energy Demand ◽  
Minimal Amount ◽  
Experimental Setup ◽  
High Pressure Co2 ◽  
Kinetic And Thermodynamic Analysis

One of the alternatives to reduce CO2 emissions from industrial sources (mainly the oil and gas industry) is CO2 capture. Absorption with chemical solvents (alkanolamines in aqueous solutions) is the most widely used conventional technology for CO2 capture. Despite the competitive advantages of chemical solvents, the technological challenge in improving the absorption process is to apply alternative solvents, reducing energy demand and increasing the CO2 captured per unit of solvent mass. This work presents an experimental study related to the kinetic and thermodynamic analysis of high-pressure CO2 capture using ethylenediamine (EDA) as a chemical solvent. EDA has two amine groups that can increase the CO2 capture capacity per unit of solvent. A non-stirred experimental setup was installed and commissioned for CO2 capture testing. Tests of the solubility of CO2 in water were carried out to validate the experimental setup. CO2 capture testing was accomplished using EDA in aqueous solutions (0, 5, 10, and 20 wt.% in amine). Finally, a kinetic model involving two steps was proposed, including a rapid absorption step and a slow diffusion step. EDA accelerated the CO2 capture performance. Sudden temperature increases were observed during the initial minutes. The CO2 capture was triggered after the absorption of a minimal amount of CO2 (~10 mmol) into the liquid solutions, and could correspond to the “lean amine acid gas loading” in a typical sweetening process using alkanolamines. At equilibrium, there was a linear relationship between the CO2 loading and the EDA concentration. The CO2 capture behavior obtained adapts accurately (AAD < 1%) to the kinetic mechanism.

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