Equilibrium Data and Morphology of Tetra-n-butyl Ammonium Bromide Semiclathrate Hydrate with Carbon Dioxide

2012 ◽  
Vol 57 (5) ◽  
pp. 1557-1562 ◽  
Author(s):  
N. Ye ◽  
P. Zhang
Keyword(s):  
Carbon Dioxide ◽  
Ammonium Bromide ◽  
Equilibrium Data ◽  
Semiclathrate Hydrate

Thermodynamic investigation of hydrate-based CO2 capture from simulated flue gas with new mixed promoters

2021 ◽  
Vol 19 (1) ◽  
pp. 75-85
Author(s):  
Jing Bai ◽  
Canwei Cheng ◽  
Yuanxia Wei ◽  
Kele Yan ◽  
Pan Li ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Phase Equilibrium ◽  
Flue Gas ◽  
Experimental Results ◽  
Ammonium Bromide ◽  
Phase Equilibrium Data ◽  
Absolute Deviation ◽  
Equilibrium Data ◽  
Robinson Equation ◽  
Good Agreement

Abstract CO2 hydrate-based desalination (CHBD) has been developing for decades to meet the global demands of decreasing carbon dioxide (CO2) emissions. In this work, the CO2 was captured from the simulated flue gas which consists of 18.30 mol% carbon dioxide and 81.70 mol% nitrogen in the presence of tetra-n-butyl ammonium bromide (TBAB) + cyclopentane (CP) + glucoamylase. Then the phase equilibrium data of CO2 hydrate were measured by the method of isochoric pressure-search. Among the seven cases with same concentration of TBAB (0.29 mol%) and CP (5.00 vol%) and different glucoamylase proportions (ranging from 0.00 to 20.00 wt%), the optimum concentration of glucoamylase in the mixed promoters was 3.00 wt%. The phase equilibrium data was calculated by the modified van der Waals–Platteeuw (vdW–P) model with a modification of vapor pressure of water in the empty hydrate lattice. The Peng–Robinson equation of state was used to calculate the fugacity of gas. The maximum average absolute deviation was 4.09% between the calculated results and the experimental results. It revealed that the calculated results were in good agreement with the experimental results.

Thermodynamic Studies of Iron Carbonate Solubility in Aqueous Monoethylene Glycol Mixtures and CO2 Atmosphere

2016 ◽  
Vol 830 ◽  
pp. 134-138 ◽  
Author(s):  
Camila Senna Figueiredo ◽  
Jailton Ferreira do Nascimento ◽  
Rony Oliveira de Sant'ana ◽  
Deborah Cordeiro de Andrade ◽  
Zaniel Souto Dantas Procópio ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Natural Gas ◽  
High Capacity ◽  
Gas Production ◽  
Aqueous Mixtures ◽  
Iron Carbonate ◽  
Low Viscosity ◽  
Carbon Dioxide Atmosphere ◽  
Equilibrium Data ◽  
Monoethylene Glycol

Monoethylene glycol (MEG) is being widely applied as thermodynamic inhibitor to avoid formation of natural gas hydrates. High hydrophilicity, low toxicity, low viscosity, low solubility in liquid hydrocarbons and high capacity of dissolving salts are advantageous for the use of MEG in the natural gas production. In addition, MEG recovery can be easily achieved considering its low volatility in relation to water, which makes the process economical and environmentally feasible. The reuse of MEG is being theme of research and phase equilibrium data for the involved species are required. In this work, a experimental procedure to synthetize iron carbonate and, afterwards, determine its solubility in aqueous mixtures of MEG in the presence of carbon dioxide atmosphere have been developed. Furthermore, a series of solubility data has been measured. This work presents a worthy contribution to the description of iron carbonate aqueous solubilities in the presence of MEG and carbon dioxide, regarding the instability of the salt to respect of oxidation. Subsequently, the knowledge of the behavior of the iron carbonate solubilities is useful for the industrial unities of production of natural gas and recovery of MEG.

Measurement of pure hydrogen and pure carbon dioxide adsorption equilibria for THF clathrate hydrate and tetra-n-butyl ammonium bromide semi-clathrate hydrate

2013 ◽  
Vol 357 ◽  
pp. 80-85 ◽  
Author(s):  
Hiroyuki Komatsu ◽  
Atsushi Hayasaka ◽  
Masaki Ota ◽  
Yoshiyuki Sato ◽  
Masaru Watanabe ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Clathrate Hydrate ◽  
Ammonium Bromide ◽  
Pure Hydrogen ◽  
Carbon Dioxide Adsorption ◽  
Adsorption Equilibria ◽  
Pure Carbon ◽  
Pure Carbon Dioxide

High-pressure phase equilibrium data for carbon dioxide + dichloromethane + acetone and carbon dioxide + dichloromethane + acetone + N-acetylcysteine (NAC)

2018 ◽  
Vol 473 ◽  
pp. 132-137 ◽  
Author(s):  
Evertan A. Rebelatto ◽  
Gean Pablo S. Aguiar ◽  
Angelo L. Piato ◽  
João P. Bender ◽  
Marcelo Lanza ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Phase Equilibrium ◽  
High Pressure Phase ◽  
Phase Equilibrium Data ◽  
Equilibrium Data ◽  
Pressure Phase

High pressure phase equilibrium data for carbon dioxide, methyl methacrylate and poly (dimethylsiloxane) systems

2019 ◽  
Vol 143 ◽  
pp. 346-352 ◽  
Author(s):  
T.M.M. Santos ◽  
E.A. Rebelatto ◽  
B.B. Chaves ◽  
M. Lanza ◽  
J.V. Oliveira ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Phase Equilibrium ◽  
Methyl Methacrylate ◽  
High Pressure Phase ◽  
Phase Equilibrium Data ◽  
Equilibrium Data ◽  
Pressure Phase
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