XXXII.—The solubility of carbon dioxide in water in the presence of starch

Abstract

THE solubility of carbon dioxide in water in the presence of starch was determined by Pindlay and Williams (T., 1913, 103, 636) at pressures lower than atmospheric, and by Findlay and Creighton (T., 1910, 97, 536) a t pressures above that of the atmosphere. From these determinations it appeared that the solubility increases slightly and continuously as the pressure is increased. As this behaviour is different from that found in the case of other colloids it seemed advisable t o re-determine this solubility.The apparatus employed was the same as that previously used, but it has been found possible t o improve its working and manipulation so as t o increase the accuracy of the measurements. We believe the accuracy of the present determinations may be taken as not much less than 0.1 per cent. I n the previous determinations thO initial and final volume of the gas in the burette was read a t different pressures, and the dead space correction which had to be introduced was rather large. I n the present series of determinations the dead-space correction was eliminated by reducing the pressure on the gas in the burette and connecting capillary to atmospheric pressure after the absorption of the gas. The volume of gas was, therefore, always read a t the same pressure. This reading can be done more accurately than the reading of pressure, and although readings of the pressure must also be made, errors in such readings have comparatively little influence on the final result. By working in this way, also, the calculation becomes simplified, the solubility being given by the expression :

An Investigation of the Equilibria Existing in Gas-Water Systems Forming Electrolytes

“…Findlay and Howell (30) (34). Wilke (37) attempts to e~la1n the equilibria of C02 in water solutions.…”

“…Alao from equation (24) °802 The value of (x] may be oaloulated from equation (30) 0.1706 System SulEhur Dioxide-Water.…”

Modeling CO2 Solubility in Water at High Pressure and Temperature Conditions

“…The accuracy, generalization, and reliability of any correlation or model are associated with the size of the considered database as well as its degree of abundance with respect to the variables and their corresponding ranges. Here we collected 785 experimental data points from many different publications. ,,− ,,− ,,− ,,− , We decided to test our proposed models with pressure and temperature as inputs and CO 2 solubility in pure water as the output. A statistical overview of the considered database is stated in Table .…”

“…Here we collected 785 experimental d a t a p o i n t s f r o m m a n y d i ff e r e n t p u b l i c ations. 17,21,[55][56][57][58][59][60][61][62][63][64]22,[65][66][67][68][69][70][71][72][73][74]23,[75][76][77][78][79][80][81][82][83]26,[28][29][30][31]54 We decided to test our proposed models with pressure and temperature as inputs and CO 2 solubility in pure water as the output. A statistical overview of the considered database is stated in Table 1.…”

Toward Estimating CO2 Solubility in Pure Water and Brine Using Cascade Forward Neural Network and Generalized Regression Neural Network: Application to CO2 Dissolution Trapping in Saline Aquifers

“…Given the crucial relevance of CO 2 solubility in both pure water and brine, numerous extensive studies have been conducted to acquire valuable insights into CO 2 dissolution in aqueous solutions. These investigations entail extensive experimental measurements of CO 2 solubility in pure water − and brine, − considering a range of geological pressure and temperature conditions, as well as the presence of various salts commonly found in brine compositions. Nevertheless, due to the multitude of factors influencing solubility under real conditions, such as the presence of diverse salts in the formation of brine and variations in pressure and temperature across different geological formations, researchers are primarily focused on the development of models or correlations to estimate solubility data.…”