Québec, Canada
Québec, Canada

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Patent
Co2 Solutions Inc. | Date: 2016-11-23

A formulation and process for capturing CO_(2 )use an absorption mixture containing water, biocatalysts and a carbonate compound. The process includes contacting a CO_(2)-containing gas with the absorption mixture to enable dissolution and transformation of CO_(2 )into bicarbonate and hydrogen ions, thereby producing a CO_(2)-depleted gas and an ion-rich solution, followed by subjecting the ion-rich solution to desorption. The biocatalyst improves absorption of the mixture comprising carbonate compounds and the carbonate compound promotes release of the bicarbonate ions from the ion-rich solution during desorption, producing a CO_(2 )gas stream and an ion-depleted solution.


Patent
Co2 Solutions Inc. | Date: 2016-09-30

A process for desorbing CO_(2 )gas from an ion-rich aqueous mixture comprising bicarbonate and hydrogen ions, includes providing micro-particles in the ion-rich aqueous mixture; and feeding the ion-rich aqueous mixture into a desorption reactor; the micro-particles comprising a support material and biocatalysts supported and stabilized by the support material and being sized and provided in a concentration in the desorption reactor such that the micro-particles are carried with the ion-rich aqueous mixture to promote transformation of the bicarbonate and hydrogen ions into CO_(2 )gas and water, thereby producing a CO_(2 )gas stream and an ion-depleted solution.


Patent
Alstom and Co2 Solutions Inc. | Date: 2013-04-23

The present disclosure describes the efficient use of a catalyst, an enzyme for example, to provide suitable real cyclic capacity to a solvent otherwise limited by its ability to absorb and maintain a high concentration of CO_(2 )captured from flue gas. This invention can apply to non-promoted as well as promoted solvents and to solvents with a broad range of enthalpy of reaction.


Patent
CO2 Solutions Inc. | Date: 2012-08-23

A process is disclosed for recycling carbon dioxide emissions from a fossil-fuel power plant into useful carbonated species The process primarily comprises the steps of: a) burning the fossil fuel, thereby generating heat and a hot exhaust gas containing CO_(2); and b) converting the heat into energy. The process is characterized in that it further comprises the steps of: c) cooling the exhaust gas; and d) biologically transforming the CO_(2 )contained in the cooled exhaust gas into carbonated species, thereby obtaining a low CO_(2 )exhaust gas and producing useful carbonated species. The low CO_(2 )exhaust gas obtained in step d) can be released in the atmosphere without increasing the problem of greenhouse effect.


A formulation and process for capturing CO_(2 )use an absorption mixture containing water, biocatalysts and a carbonate compound. The process includes contacting a CO_(2)-containing gas with the absorption mixture to enable dissolution and transformation of CO_(2 )into bicarbonate and hydrogen ions, thereby producing a CO_(2)-depleted gas and an ion-rich solution, followed by subjecting the ion-rich solution to desorption. The biocatalyst improves absorption of the mixture comprising carbonate compounds and the carbonate compound promotes release of the bicarbonate ions from the ion-rich solution during desorption, producing a CO_(2 )gas stream and an ion-depleted solution.


A method, process, apparatus, use and formulation for dual biocatalytic conversion of CO_(2 )containing gas into carbon containing bio-products by enzymatic hydration of CO_(2 )into bicarbonate ions in the presence of carbonic anhydrase and metabolic conversion of the bicarbonate ions into carbon containing bio-products in a biological culture. The dual biocatalytic conversion may be relatively constant with controlling a feeding of the bicarbonate ions to the biological culture in accordance with demands of the biological culture by retaining over-production of bicarbonate ions and feeding part of the over-production to the biological culture in accordance with nutrient demands of the biological culture. Bicarbonate ions may also be reconverted to generate a pure CO_(2 )gas stream. The CO_(2 )containing gas may be derived from operations of a power plant which receives a carbon-containing fuel for combustion, and the biological culture may be an algae culture.


A formulation and process for capturing CO_(2 )use an absorption mixture containing water, biocatalysts and an absorption compound selected from dimethylmonoethanolamine (DMMEA), diethylmonoethanolamine (DEMEA), and dimethylglycine. The process may include contacting a CO_(2)-containing gas with the absorption mixture to enable dissolution and transformation of CO_(2 )into bicarbonate and hydrogen ions, thereby producing a CO_(2)-depleted gas and an ion-rich solution, followed by subjecting the ion-rich solution to desorption.


Use of Sulfurihydrogenibium sp. carbonic anhydrase (SspCA) or mutants thereof for catalyzing the hydration reaction of CO_(2 )into bicarbonate and hydrogen ions or catalyzing the desorption reaction to produce a CO_(2 )gas is provided.


Techniques related to enhancement of CO_(2 )absorption use selection of an enzyme coordinated with selection of an absorption solution having a pKa to enhance or maximize the CO_(2 )capture rate. The techniques may use various relationships between process variables such as temperature, concentration, and so on, in order to provide efficient CO_(2 )capture.


A carbonic anhydrase bioreactor for treating a CO_(2)-containing gas includes a reaction chamber for receiving a liquid; porous particles with carbonic anhydrase entrapped therein provided in the reaction chamber for catalyzing a reaction of CO_(2 )into bicarbonate and hydrogen ions to obtain a treated gas and an ion-rich solution; a retention device for retaining the porous particles within the reaction chamber; a liquid inlet for providing the liquid; a gas inlet for providing the CO_(2)-containing gas; a liquid outlet for releasing the ion-rich solution; and a gas outlet to release the treated gas. Processes are also described for treating a CO_(2)-containing gas, where particles comprising porous material with entrapped carbonic anhydrase catalyze the reaction and the particles are retained in the reaction chamber.

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