Patents by Inventor Raphael Idem
Raphael Idem has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230078337Abstract: A solvent composition for carbon capture according to a preferred embodiment comprises at least two of the following: diethylaminoethanol (DEAE), hexamethylenediamine (HMDA), and polyethylenimine (PEI). Another embodiment includes a method of performing carbon capture using the carbon capture solvent compositions described herein. Another embodiment provides an apparatus for performing carbon capture using the carbon capture compositions described herein and/or the carbon capture methods described herein.Type: ApplicationFiled: August 15, 2022Publication date: March 16, 2023Inventors: Raphael IDEM, Teeradet SUPAP, Jessica NARKU-TETTEH, Pailin MUCHAN, Paweesuda NATEWONG
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Patent number: 9586175Abstract: A process for separating at least a portion of an acid gas from a gaseous mixture, said process comprising contacting the gaseous mixture with an absorption medium and/or adsorption medium, wherein said medium absorbs and/or adsorbs at least a portion of the acid gas to form a rich medium; and separating at least a portion of the acid gas from the rich medium to form a lean medium; wherein the separation step is performed in the presence of an acid catalyst.Type: GrantFiled: March 29, 2011Date of Patent: March 7, 2017Assignee: UNIVERSITY OF REGINAInventors: Raphael Idem, Huancong Shi, Don Gelowitz, Paitoon Tontiwachwuthikul
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Patent number: 9339797Abstract: The present application describes a catalyst that is suitable for the CO2 reforming of methane-rich gases, such as biogas, that is resistant to poisoning by sulfur. The catalyst comprises from about 5 wt % to about 20 wt % Ni and 0 wt % to about 10 wt % Co supported on a support having a formula selected from: (a) Al2O3; (b) M1aOb—Al2O3; and (c) M1aOb—ZrO2—Al2O3, where M1aOb is either CaO or MgO.Type: GrantFiled: May 29, 2012Date of Patent: May 17, 2016Inventors: Raphael Idem, Ataullah Khan Mohammed, Bappy Saha
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Reactive extraction process for regeneration of amine-based solvents used for carbon dioxide capture
Patent number: 9155998Abstract: A method for recovery of impurities and/or degradation products and/or heat-stable salts from amine-based solvents used for capture of CO2 from gas streams. The method comprises recovering CO2 from a CO2-enriched amine-based solvent thereby producing a lean amine-based solvent, contacting and mixing together the lean amine-based solvent with a reaction composition comprising a phase-change catalyst and a diluent, thereby producing a first organic phase comprising the impurities and/or degradation products and/or heat-stable salts and a first aqueous phase comprising the lean amine-based solvent, separating the first organic phase and the first aqueous phase; and separately recovering the first organic phase and the first aqueous phase. The organic phase can be regenerated by intermixing with a NaOH solution to form an organic phase comprising therein the reaction composition and and an aqueous phase comprising the NaOH solution with the impurities and/or degradation products and/or heat-stable salts.Type: GrantFiled: January 19, 2012Date of Patent: October 13, 2015Assignee: University of ReginaInventors: Chintana Saiwan, Phattara Akkarachalanont, Teeradet Supap, Raphael Idem, Paitoon Tontiwachwuthikul -
Patent number: 9028593Abstract: A method and apparatus for recovering a gaseous component from an incoming gas stream is described. The incoming gas stream is contacted with a lean aqueous absorbing medium to absorb at least a portion of the gaseous component from the incoming gas stream to form a lean treated gas stream and a rich aqueous absorbing medium. At least a portion of the gaseous component is desorbed from the rich aqueous absorbing medium at a temperature to form an overhead gas stream and a regenerated aqueous absorbing medium. At least a portion of the overhead gas stream is treated to recover a condensate stream. At least a portion of the condensate stream is used to form a heated stream. At least a portion of the heated stream is recycled back to the desorbing step. Novel absorbing medium compositions to recover carbon dioxide and/or hydrogen sulfide are also described.Type: GrantFiled: March 4, 2013Date of Patent: May 12, 2015Assignee: University of ReginaInventors: Don Gelowitz, Paitoon Tontiwachwuthikul, Raphael Idem
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Publication number: 20140134101Abstract: The present application describes a catalyst that is suitable for the CO2 reforming of methane-rich gases, such as biogas, that is resistant to poisoning by sulfur. The catalyst comprises from about 5 wt % to about 20 wt % Ni and 0 wt % to about 10 wt % Co supported on a support having a formula selected from: (a) Al2O3; (b) M1aOb-AI2O3; and (c) M1aOb—ZrO2-AI2O3, where M1aOb is either CaO or MgO.Type: ApplicationFiled: May 29, 2012Publication date: May 15, 2014Inventors: Raphael Idem, Ataullah Khan Mohammed, Bappy Saha
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REACTIVE EXTRACTION PROCESS FOR REGENERATION OF AMINE-BASED SOLVENTS USED FOR CARBON DIOXIDE CAPTURE
Publication number: 20140094360Abstract: A method for recovery of impurities and/or degradation products and/or heat-stable salts from amine-based solvents used for capture of C02 from gas streams. The method comprises recovering C02 from a C02-enriched amine-based solvent thereby producing a lean amine-based solvent, contacting and mixing together the lean amine-based solvent with a reaction composition comprising a phase-change catalyst and a diluent, thereby producing a first organic phase comprising the impurities and/or degradation products and/or heat-stable salts and a first aqueous phase comprising the lean amine-based solvent, separating the first organic phase and the first aqueous phase; and separately recovering the first organic phase and the first aqueous phase. The organic phase can be regenerated by intermixing with a NaOH solution to form an organic phase comprising therein the reaction composition and and an aqueous phase comprising the NaOH solution with the impurities and/or degradation products and/or heat-stable salts.Type: ApplicationFiled: January 19, 2012Publication date: April 3, 2014Applicant: UNIVERSITY OF REGINAInventors: Chintana Saiwan, Phattara Akkarachalanont, Teeradet Supap, Raphael Idem, Paitoon Tontiwachwuthikul -
Publication number: 20130108532Abstract: A process for separating at least a portion of an acid gas from a gaseous mixture, said process comprising contacting the gaseous mixture with an absorption medium and/or adsorption medium, wherein said medium absorbs and/or adsorbs at least a portion of the acid gas to form a rich medium; and separating at least a portion of the acid gas from the rich medium to form a lean medium; wherein the separation step is performed in the presence of an acid catalyst.Type: ApplicationFiled: March 29, 2011Publication date: May 2, 2013Applicant: UNIVERSITY OF REGINAInventors: Raphael Idem, Huancong Shi, Don Gelowitz, Paitoon Tontiwachwuthikul
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Publication number: 20130058861Abstract: A series of ternary oxide and quaternary oxide catalysts were prepared and evaluated for various reforming processes. Representative examples of these catalysts were found to be active and stable for all the processes tested verifying the “feedstock and process flexible” nature of these catalysts. Thus, feedstock- and process-flexible reforming catalysts for hydrogen and/or syngas production have been developed.Type: ApplicationFiled: March 4, 2011Publication date: March 7, 2013Applicant: University of ReginaInventors: Raphael Idem, Ataullah Khan Mohammed, Hussameldin Ibrahim, Paitoon Tontiwachwuthikul, Thitinat Sukonket, Mohammed Faysal Ahamed Khan, Protyai Sengupta, Mohammed Abu Zahid, Bappy Saha
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Patent number: 8388737Abstract: A method and apparatus for recovering a gaseous component from an incoming gas stream is described. The incoming gas stream is contacted with a lean aqueous absorbing medium to absorb at least a portion of the gaseous component from the incoming gas stream to form a lean treated gas stream and a rich aqueous absorbing medium. At least a portion of the gaseous component is desorbed from the rich aqueous absorbing medium at a temperature to form an overhead gas stream and a regenerated aqueous absorbing medium. At least a portion of the overhead gas stream is treated to recover a condensate stream. At least a portion of the condensate stream is used to form a heated stream. At least a portion of the heated stream is recycled back to the desorbing step. Novel absorbing medium compositions to recover carbon dioxide and/or hydrogen sulfide are also described.Type: GrantFiled: May 29, 2008Date of Patent: March 5, 2013Assignee: University of ReginaInventors: Don Gelowitz, Paitoon Tontiwachwuthikul, Raphael Idem
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Patent number: 8105420Abstract: The present application includes a method for inhibiting amine degradation during CO2 capture from flue gas streams. Particularly, the present disclosure relates to a method of inhibiting O2- and/or SO2-induced degradation of amines using sodium sulfite (Na2SO3), potassium sodium tartrate tetrahydrate (KNaC4H4O6.4H2O), ethylenediaminetetraacetic acid (EDTA) or hydroxylamine (NH2OH), or analogs or mixtures thereof during CO2 capture by amines.Type: GrantFiled: November 19, 2008Date of Patent: January 31, 2012Assignee: The University of ReginaInventors: Raphael Idem, Paitoon Tontiwachwuthikul, Chintana Saiwan, Teeradet Supap, Purachet Pitipuech
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Publication number: 20110300044Abstract: Corrosion inhibitors and processes, uses, methods, compositions, devices, and apparatus involving corrosion inhibitors are disclosed. In certain embodiments the use of specific corrosion inhibitors, specific concentrations of inhibitors, blends of inhibitors, processes utilizing such inhibitors, and compositions comprising such inhibitors, for example in acid gas separation systems such as aqueous amine- or ammonia-based CO2 separation systems (e.g., the post combustion capture of CO2 from flue gases using amines). According to some embodiments, corrosion inhibitors are used in a process for separating at least a portion of an acid gas from a gaseous mixture wherein the inhibitor is at least one selected from dodecylamine, sodium molybdate, morpholine, or a combination thereof.Type: ApplicationFiled: May 5, 2011Publication date: December 8, 2011Applicant: University of ReginaInventors: Paitoon Tontiwachwuthikul, Raphael Idem, Nattawan Kladkaew, Chintana Saiwan
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Patent number: 7910078Abstract: The present invention relates to a method for removing carbon dioxide (CO2) from a gas stream. Particularly, the present invention relates to a method for removing CO2 from a gas stream by a liquid absorbent having an amino alcohol derived from 4-amino-2-butanol. In comparison to conventional amines, the amino alcohols of the present invention have been found to provide a higher CO2 absorption capacity and a higher cyclic capacity for CO2 removal.Type: GrantFiled: August 23, 2007Date of Patent: March 22, 2011Assignee: University of ReginaInventors: Paitoon Tontiwachwuthikul, Andrew G. H. Wee, Raphael Idem, Kreangkrai Maneeintr, Gao-jun Fan, Amornvadee Veawab, Amr Henni, Adisorn Aroonwilas, Amit Chakma
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Publication number: 20100229723Abstract: A method and apparatus for recovering a gaseous component from an incoming gas stream is described. The incoming gas stream is contacted with a lean aqueous absorbing medium to absorb at least a portion of the gaseous component from the incoming gas stream to form a lean treated gas stream and a rich aqueous absorbing medium. At least a portion of the gaseous component is desorbed from the rich aqueous absorbing medium at a temperature to form an overhead gas stream and a regenerated aqueous absorbing medium. At least a portion of the overhead gas stream is treated to recover a condensate stream. At least a portion of the condensate stream is used to form a heated stream. At least a portion of the heated stream is recycled back to the desorbing step. Novel absorbing medium compositions to recover carbon dioxide and/or hydrogen sulfide are also described.Type: ApplicationFiled: May 29, 2008Publication date: September 16, 2010Applicant: UNIVERSITY OF REGINAInventors: Don GELOWITZ, Paitoon TONTIWACHWUTHIKUL, Raphael IDEM
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Publication number: 20090205496Abstract: The present application includes a method for inhibiting amine degradation during CO2 capture from flue gas streams. Particularly, the present disclosure relates to a method of inhibiting O2- and/or SO2-induced degradation of amines using sodium sulfite (Na2SO3), potassium sodium tartrate tetrahydrate (KNaC4H4O6.4H2O), ethylenediaminetetraacetic acid (EDTA) or hydroxylamine (NH2OH), or analogs or mixtures thereof during CO2 capture by amines.Type: ApplicationFiled: November 19, 2008Publication date: August 20, 2009Applicant: THE UNIVERSITY OF REGINAInventors: Raphael Idem, Paitoon Tontiwachwuthikul, Chintana Saiwan, Teeradet Supap, Purachet Pitipuech
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Publication number: 20080050296Abstract: The present invention relates to a method for removing carbon dioxide (CO2) from a gas stream. Particularly, the present invention relates to a method for removing CO2 from a gas stream by a liquid absorbent having an amino alcohol derived from 4-amino-2-butanol. In comparison to conventional amines, the amino alcohols of the present invention have been found to provide a higher CO2 absorption capacity and a higher cyclic capacity for CO2 removal.Type: ApplicationFiled: August 23, 2007Publication date: February 28, 2008Applicant: University of ReginaInventors: Paitoon Tontiwachwuthikul, Andrew Wee, Raphael Idem, Kreangkrai Maneeintr, Gao-jun Fan, Amornvadee Veawab, Amr Henni, Adisorn Aroonwilas, Amit Chakma
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Publication number: 20060216227Abstract: The present invention relates to catalysts for the production of hydrogen using the water gas shift reaction and the carbon dioxide reforming of hydrocarbon-containing fuels. The catalysts nickel and/or copper on a ceria/zirconia support, where the support is prepared using a surfactant templating method. The invention also includes processes for producing hydrogen, reactors and hydrogen production systems utilizing these catalysts.Type: ApplicationFiled: March 14, 2006Publication date: September 28, 2006Applicant: University of ReginaInventors: Raphael Idem, Prashant Kumar, Yanping Sun