Patent ID: 11964233
Assignee: YALE UNIVERSITY
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 0:
1. A method of at least partially sequestering CO2 from an influent aqueous solution comprising aqueous or gaseous CO2, the method comprising:
(a) measuring in the influent aqueous solution comprising dissolved aqueous or gaseous CO2, at least two parameters selected from the group consisting of pH, alkalinity, dissolved CO2 concentration, dissolved inorganic carbon (DIC) concentration, bicarbonate ion concentration, carbonate ion concentration, and partial pressure of CO2 (g);
(b) feeding the influent aqueous solution through at least one container comprising a mineral feedstock,
wherein the mineral feedstock comprises at least one selected from the group consisting of a metal silicate, a metal carbonate, and a metal oxide;

(c) contacting the influent aqueous solution with the mineral feedstock to provide an effluent aqueous solution comprising one or more metal ions or carbonate ions dissolved therein;
(d) measuring in the effluent aqueous solution at least two parameters selected from the group consisting of pH, alkalinity, dissolved CO2 concentration, dissolved inorganic carbon (DIC) concentration, bicarbonate ion concentration, carbonate ion concentration, and partial pressure of CO2 (g);
(e) comparing the at least two measured parameters of the influent aqueous solution and the at least two measured parameters of the effluent aqueous solution to calculate a change in dissolved CO2 concentration; and
(f) modifying at least one parameter of the influent aqueous solution or contacting step if the change comprises a decrease in dissolved CO2 concentration of less than about 95% wherein:
(i) the at least one parameter of the influent aqueous solution or contacting step is selected from the group consisting of pH, alkalinity, dissolved CO2 concentration, dissolved inorganic carbon (DIC) concentration, bicarbonate ion concentration, carbonate ion concentration, partial pressure of CO2 (g), temperature, turbidity, total suspended solids, conductivity, and mineral feedstock particle size; and
(ii) the modifying comprises at least one selected from the group consisting of acidification, carbonation, aeration, agitation, addition of mineral feedstock, temperature modification, and flow rate modification.