scholarly journals Viscosity and density measurements of aqueous amines at high pressures: MDEA-water and MEA-water mixtures for CO2 capture

2016 ◽  
Vol 98 ◽  
pp. 231-241 ◽  
Author(s):  
Manuel Sobrino ◽  
Eduardo I. Concepción ◽  
Ángel Gómez-Hernández ◽  
M. Carmen Martín ◽  
José J. Segovia
Keyword(s):  
Co2 Capture ◽  
High Pressures ◽  
Density Measurements ◽  
Aqueous Amines

Nanoporous activated biocarbons with high surface areas from alligator weed and their excellent performance for CO2 capture at both low and high pressures

2021 ◽  
Vol 406 ◽  
pp. 126787
Author(s):  
Gurwinder Singh ◽  
Rohan Bahadur ◽  
Jang Mee Lee ◽  
In Young Kim ◽  
Ajanya M. Ruban ◽  
...  
Keyword(s):  
Co2 Capture ◽  
High Pressures ◽  
High Surface ◽  
Excellent Performance ◽  
Alligator Weed ◽  
Surface Areas

scholarly journals Viscosity and density measurements on liquid n-tetradecane at moderately high pressures

2017 ◽  
Vol 453 ◽  
pp. 46-57 ◽  
Author(s):  
Tânia V.M. Santos ◽  
Marta F.V. Pereira ◽  
Helena M.N.T. Avelino ◽  
Fernando J.P. Caetano ◽  
João M.N.A. Fareleira
Keyword(s):  
High Pressures ◽  
Density Measurements

scholarly journals Techno-Economic Analysis of Pressurized Oxy-Fuel Combustion of Petroleum Coke

Energies ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3463
Author(s):  
Hachem Hamadeh ◽  
Sannan Y. Toor ◽  
Peter L. Douglas ◽  
S. Mani Sarathy ◽  
Robert W. Dibble ◽  
...  
Keyword(s):  
Economic Analysis ◽  
Petroleum Coke ◽  
Co2 Capture ◽  
High Pressures ◽  
Waste Treatment ◽  
The United States ◽  
Heavy Petroleum ◽  
Additional Absorption ◽  
Optimum Pressure ◽  
Levelized Cost Of Electricity

Petroleum coke (petcoke) is a by-product of heavy petroleum refining, with heating values comparable to that of coal. It is readily available in oil-producing countries such as the United States of America (USA) and the Kingdom of Saudi Arabia (KSA) at minimum costs and can be used as an inexpensive fossil fuel for power generation. Oxy-petcoke combustion is an attractive CO2 capture option as it avoids the use of additional absorption units and chemicals, and results in a CO2 + H2O flue gas stream that is compressed and dehydrated in a CO2 capture and purification unit (CO2CPU). The additional cost of the CO2CPU can be reduced through high pressure combustion. Hence, this paper reports a techno-economic analysis of an oxy-petcoke plant with CO2 capture simulated at pressures between 1 and 15 bars in Aspen PlusTM based on USA and KSA scenarios. Operating at high pressures leads to reduced equipment sizes and numbers of units, specifically compressors in CO2CPU, resulting in increased efficiencies and decreased costs. An optimum pressure of ~10 bars was found to maximize the plant efficiency (~29.7%) and minimize the levelized cost of electricity (LCOE), cost of CO2 avoided and cost of CO2 captured for both the USA and KSA scenarios. The LCOE was found to be moderately sensitive to changes in the capital cost (~0.7% per %) and increases in cost of petcoke (~0.5% per USD/tonne) and insensitive to the costs of labour, utilities and waste treatment.

Probing dissolved CO2(aq) in aqueous solutions for CO2 electro-reduction and storage

2022 ◽  
Author(s):  
Jiachen Li ◽  
Jinyu Guo ◽  
Hongjie Dai
Keyword(s):  
Aqueous Solutions ◽  
Co2 Capture ◽  
High Pressures ◽  
Dynamic Monitoring ◽  
State Transitions ◽  
Ir Absorption ◽  
Large Hysteresis ◽  
Co2 Electroreduction ◽  
First Time

CO2 dissolved in aqueous solutions is of wide ranging importance from CO2 capture, storage and photo-/electro-reduction in the fight against global warming, to CO2 analysis in various liquids including natural waterbodies and consumer drinking products. Here we developed micro-scale infrared (IR) spectroscopy for in-situ dynamic monitoring and quantitating CO2(aq) in aqueous solutions with high time resolutions under various conditions including CO2 gas bubbling and high pressures. The quantized CO2(g) rotational state transitions were observed to quench when dissolved in water to form CO2(aq) solvated by water molecules, accompanied by increased H2O IR absorption. An accurate CO2 molar extinction coefficient ε was derived for in-situ CO2(aq) quantification up to 58 atm. For the first time, we directly measured CO2(aq) concentrations in electrolytes under CO2(g) bubbling and high pressure conditions. In KHCO3 electrolytes with CO2(aq) > ~ 1 M, CO2 electroreduction (CO2RR) to formate reaches > 98% Faradaic efficiencies on copper (Cu2O/Cu) based electrocatalyst. Further, we probed CO2 dissolution/desolvation kinetics important to energy and environmental applications dynamically, revealing large hysteresis and ultra-slow reversal of CO2(aq) supersaturation in water, with implications to CO2 capture, storage and supersaturation phenomena in natural water bodies.

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