Comments on “A Study on Equilibrium Solubility for Carbon Dioxide in Methyldiethanolamine−Piperazine−Water Solution”

2000 ◽  
Vol 39 (9) ◽  
pp. 3397-3397
Author(s):  
Ralph H. Weiland
Keyword(s):  
Carbon Dioxide ◽  
Water Solution ◽  
Equilibrium Solubility

Correlations for Equilibrium Solubility of Carbon Dioxide in Aqueous 4-(Diethylamino)-2-butanol Solutions

2011 ◽  
Vol 50 (24) ◽  
pp. 14008-14015 ◽  
Author(s):  
Teerawat Sema ◽  
Abdulaziz Naami ◽  
Raphael Idem ◽  
Paitoon Tontiwachwuthikul
Keyword(s):  
Carbon Dioxide ◽  
Equilibrium Solubility

scholarly journals DEVELOPMENT OF THE TECHNIQUE OF OPERATION OF GEOTHERMAL SYSTEMS WHEN EXTRACTING ASSOCIATED GASES

2019 ◽  
Vol 45 (3) ◽  
pp. 29-38
Author(s):  
G. Ya. Akhmedov ◽  
A. S. Kurbanismailova
Keyword(s):  
Waste Water ◽  
Carbon Dioxide ◽  
Geothermal Energy ◽  
Water Solution ◽  
Energy Systems ◽  
Hot Water ◽  
Geothermal Water ◽  
Mineral Waters ◽  
Geothermal Systems ◽  
North Caucasus

Objectives. The aim of the study is to develop a method of operating geothermal energy systems in the mode without scaling when disposing of flammable gases with geothermal water in wells with a low gas factor.Method. The studies were conducted on the basis of analyzing the content of associated flammable gases in the underground thermal mineral waters of the North Caucasus and Ciscaucasian deposits and assessing the possibility of their utilization and use for heating and hot water supply. In this case, the laws of dissolution and desorption of methane and carbon dioxide from groundwater solutions with the content of scale-forming components, in particular, calcium carbonate, are used.Result. On the basis of the conducted research, it was found that the operation of g eothermal systems in the power industry should be carried out after preliminary withdrawal of the maximum possible amount of associated flammable gases from a water solution, while maintaining the content of carbon dioxide in water at a level above the equilibrium value. The scheme of the effective operation of thermal distribution stations with the prevention of carbonate deposits in them is given by using the products of associated gas combustion in the waste water when it is pumped back into the aquifer.Conclusion. As a result of the research conducted, a method of operating geothermal energy systems in a non-salt-scale mode has been developed for utilization of combustible gases associated with geothermal water. It has been established that in order to accelerate the dissolution of carbon dioxide in water to stabilize it before entering heat-exchange equipment, it is advisable to increase the partial pressure of carbon dioxide to values exceeding by an order of magnitude the equilibrium at a given temperature. At the same time, before pumping waste water back into the aquifer, excess carbon dioxide is removed from the water.

Study of an Electrochemical Alcohol Concentration Sensor: Optimization of the Anode Structure

2006 ◽  
Vol 4 (3) ◽  
pp. 345-349 ◽  
Author(s):  
Mauro Sgroi ◽  
Gianluca Bollito ◽  
Gianfranco Innocenti ◽  
Guido Saracco ◽  
Stefania Specchia ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Fuel Cell ◽  
Platinum Catalyst ◽  
Water Solution ◽  
Limiting Current ◽  
Polymeric Membrane ◽  
Power Sources ◽  
Alcohol Water ◽  
Steady State Current ◽  
Micro Power

Micro power sources have a wide potential market for consumer electronics and portable applications, such as weather stations, medical devices, signal units, APU (auxiliary power units), gas sensors, and security cameras. A micro power source could be the direct methanol fuel cell system (DMFC). An important aspect of this system is the precise control of the concentration of the alcohol-water solution fed to the anode. Different detection principles were taken into consideration: electrochemical, infrared spectroscopy, gas chromatography, refractometry, density measurements, ultraviolet absorption. The present work is devoted to the study of an electrochemical amperometric sensor. The device is based on the electro-oxidation of methanol to carbon dioxide on platinum catalyst into a polymeric-membrane fuel cell operated as a galvanic cell. The alcohol-water solution under examination is fed to the anode (positive side) of a polymeric membrane fuel cell, where it reacts with water to produce carbon dioxide, protons, and electrons. Protons diffuse through the electrolyte material and recombine with electrons on the cathode catalyst (negative side). At high potentials (>0.7V) mass transfer of methanol to the electrode solution interface controls the observed current. Therefore, it is possible to correlate the solution concentration to the observed limiting current. This method was successfully applied to relatively diluted solutions (concentration <1M). The application of this principle to more concentrate solutions (up to 2M) requires an optimization of the anode structure to enhance the influence of mass transport limitation. Moreover, during continuous operation of the sensor, a decay of the signal was observed: the absence of a steady-state current value hinders the application of the sensor. An explanation of this phenomenon and a possible solution strategy are proposed.

Equilibrium solubility of carbon dioxide in 2(methylamino)ethanol

2011 ◽  
Vol 303 (2) ◽  
pp. 162-167 ◽  
Author(s):  
Hawar A.M. Haider ◽  
Rozita Yusoff ◽  
M.K. Aroua
Keyword(s):  
Carbon Dioxide ◽  
Equilibrium Solubility
Sign in / Sign up

Export Citation Format

Share Document