Phase equilibrium for ozone-containing hydrates formed from an (ozone+oxygen) gas mixture coexisting with gaseous carbon dioxide and liquid water

2012 ◽  
Vol 49 ◽  
pp. 1-6 ◽  
Author(s):  
Sanehiro Muromachi ◽  
Ryo Ohmura ◽  
Yasuhiko H. Mori
Keyword(s):  
Carbon Dioxide ◽  
Phase Equilibrium ◽  
Liquid Water ◽  
Gas Mixture ◽  
Gaseous Carbon Dioxide ◽  
Oxygen Gas

scholarly journals An Electrochemical Platform for the Carbon Dioxide Capture and Conversion to Syngas

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7869
Author(s):  
Alessio Mezza ◽  
Angelo Pettigiani ◽  
Nicolò B. D. Monti ◽  
Sergio Bocchini ◽  
M. Amin Farkhondehfal ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Carbon Dioxide Capture ◽  
Flow Cell ◽  
Gas Mixture ◽  
Electrochemical System ◽  
Outlet Flow ◽  
Gaseous Carbon Dioxide ◽  
A Current ◽  
Electrochemical Flow Cell

We report on a simple electrochemical system able to capture gaseous carbon dioxide from a gas mixture and convert it into syngas. The capture/release module is implemented via regeneration of NaOH and acidification of NaHCO3 inside a four-chamber electrochemical flow cell employing Pt foils as catalysts, while the conversion is carried out by a coupled reactor that performs electrochemical reduction of carbon dioxide using ZnO as a catalyst and KHCO3 as an electrolyte. The capture module is optimized such that, powered by a current density of 100 mA/cm2, from a mixture of the CO2–N2 gas stream, a pure and stable CO2 outlet flow of 4–5 mL/min is obtained. The conversion module is able to convert the carbon dioxide into a mixture of gaseous CO and H2 (syngas) with a selectivity for the carbon monoxide of 56%. This represents the first all-electrochemical system for carbon dioxide capture and conversion.

Oxygen-18 isotope effects in the liquid water–pyridine system as a probe of intermolecular forces

1977 ◽  
Vol 55 (16) ◽  
pp. 2966-2970 ◽  
Author(s):  
Robert H. Betts ◽  
Jan Bron ◽  
Wayne D. Buchannon ◽  
Kwok-Ying D. Wu
Keyword(s):  
Carbon Dioxide ◽  
Water Molecule ◽  
Mole Fraction ◽  
Liquid Water ◽  
Vapour Pressure ◽  
Isotope Effects ◽  
Pure Water ◽  
Intermolecular Forces ◽  
Average Water ◽  
Gaseous Carbon Dioxide

Oxygen-18 exchange between gaseous carbon dioxide and water in liquid water–pyridine mixtures is used as a probe for changes in intermolecular forces when the composition of the system is changed from pure water to pure pyridine. In agreement with results obtained previously by other methods, it is found that the interaction energy of an 'average' water molecule with the medium decreases when the mole fraction of pyridine is varied from zero to unity. The experimental results are related to the vapour pressure isotope effect, P(H218O)/P(H216O), of the binary mixtures. The utility of the Stern – Van Hook – Wolfsberg equation for vapour pressure isotope effects has been investigated. In addition, a plot of the equilibrium constant of the oxygen-18 exchange reaction vs. the mole fraction of pyridine presents no evidence of the formation of stoichiometric pyridine–water complexes.

Phase equilibrium condition measurements in carbon dioxide hydrate forming system coexisting with seawater

2021 ◽  
Vol 152 ◽  
pp. 106276
Author(s):  
Rihito Nakane ◽  
Yusuke Shimosato ◽  
Eito Gima ◽  
Ryo Ohmura ◽  
Izuru Senaha ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Phase Equilibrium ◽  
Equilibrium Condition ◽  
Carbon Dioxide Hydrate ◽  
Phase Equilibrium Condition

Preparation of hydrophobic flat sheet membranes from PVDF-HFP copolymer for enhancing the oxygen permeance in nitrogen/oxygen gas mixture

2020 ◽  
Vol 28 (6) ◽  
pp. 1566-1581
Author(s):  
Bahador Akbari ◽  
Asghar Lashanizadegan ◽  
Parviz Darvishi ◽  
Abdolrasoul Pouranfard
Keyword(s):  
Gas Mixture ◽  
Flat Sheet ◽  
Oxygen Gas

Supercritical extraction process and phase equilibrium of Candeia (Eremanthus erythropappus) oil using supercritical carbon dioxide

2008 ◽  
Vol 47 (2) ◽  
pp. 182-187 ◽  
Author(s):  
Alexandre Teixeira de Souza ◽  
Toni Luis Benazzi ◽  
Marcelo Boer Grings ◽  
Vladimir Cabral ◽  
Edson Antônio da Silva ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Phase Equilibrium ◽  
Supercritical Carbon Dioxide ◽  
Extraction Process ◽  
Supercritical Extraction ◽  
Supercritical Carbon
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