Patents by Inventor Anders Hoff
Anders Hoff 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: 20230321589Abstract: An aqueous CO2 absorbent comprising a combination of 2-amino-2-methyl-1-propanol (AMP) and 3-aminopropanol (AP), or AMP and 4-aminobutanol (AB), is described. A method for capturing CO2 from a CO2 containing gas using the mentioned absorbent, and the use of a combination of AMP and AP, or a combination of AMP and AB are also described.Type: ApplicationFiled: June 6, 2023Publication date: October 12, 2023Applicant: Aker Carbon Capture Norway ASInventors: Karl Anders Hoff, Thor Mejdell, Inna Kim, Andreas Grimstvedt, Eirik Falck Da Silva
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Publication number: 20200086267Abstract: An aqueous CO2 absorbent comprising a combination of 2-amino-2-methyl-1-propanol (AMP) and 3-aminopropanol (AP), or AMP and 4-aminobutanol (AB), is described. A method for capturing CO2 from a CO2 containing gas using the mentioned absorbent, and the use of a combination of AMP and AP, or a combination of AMP and AB are also described.Type: ApplicationFiled: November 21, 2019Publication date: March 19, 2020Applicant: Aker Engineering & Technology ASInventors: Karl Anders HOFF, Thor MEJDELL, Inna KIM, Andreas GRIMSTVEDT, Eirik Falck DA SILVA
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Patent number: 10413860Abstract: The present invention relates to an absorbent, an absorbent system and a process for removing acidic gas such as CO2 from exhaust gases from fossil fuel fired power stations, from natural gas streams, from blast furnace oven off-gases in iron/steel plants, from cement plant exhaust gas and from reformer gases containing CO2 in mixtures with H2S and COS. The liquid absorbent, a mixture of amine and amino acid salt is contacted with a CO2 containing gas in an absorber and CO2 in the gas stream is absorbed into the liquid. The absorbed CO2 forms more than one type of solid precipitate in the liquid at different absorption stages. In a first absorption stage solid precipitate of amine bicarbonate is formed and is withdrawn as slurry from the bottom of a first absorber section. In a second absorption stage solid precipitate of alkali metal bicarbonate is formed and withdrawn as slurry at the bottom of a second absorber section.Type: GrantFiled: June 12, 2015Date of Patent: September 17, 2019Assignee: SINTEF TTO ASInventors: Ugochukwu E. Aronu, Inna Kim, Karl Anders Hoff, Aslak Einbu
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Publication number: 20170106331Abstract: The present invention relates to an absorbent, an absorbent system and a process for removing acidic gas such as CO2 from exhaust gases from fossil fuel fired power stations, from natural gas streams, from blast furnace oven off-gases in iron/steel plants, from cement plant exhaust gas and from reformer gases containing CO2 in mixtures with H2S and COS. The liquid absorbent, a mixture of amine and amino acid salt is contacted with a CO2 containing gas in an absorber and CO2 in the gas stream is absorbed into the liquid. The absorbed CO2 forms more than one type of solid precipitate in the liquid at different absorption stages. In a first absorption stage solid precipitate of amine bicarbonate is formed and is withdrawn as slurry from the bottom of a first absorber section. In a second absorption stage solid precipitate of alkali metal bicarbonate is formed and withdrawn as slurry at the bottom of a second absorber section.Type: ApplicationFiled: June 12, 2015Publication date: April 20, 2017Applicant: SINTEF TTO ASInventors: Ugochukwu E. ARONU, Inna KIM, Karl Anders HOFF, Aslak EINBU
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Publication number: 20150306538Abstract: An aqueous CO2 absorbent comprising a combination of 2-amino-2-methyl-1-propanol (AMP) and 3-aminopropanol (AP), or AMP and 4-aminobutanol (AB), is described. A method for capturing CO2 from a CO2 containing gas using the mentioned absorbent, and the use of a combination of AMP and AP, or a combination of AMP and AB are also described.Type: ApplicationFiled: December 6, 2013Publication date: October 29, 2015Applicant: Aker Engineering & Technology ASInventors: Karl Anders HOFF, Thor MEJDELL, Inna KIM, Andreas GRIMSTVEDT, Eirik Falck DA SILVA
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Patent number: 8703082Abstract: The present invention relates to a method for capturing CO2 from exhaust gas in an absorber (A1), wherein the CO2 containing gas is passed through an aqueous absorbent slurry wherein said aqueous absorbent slurry comprises an inorganic alkali carbonate, bicarbonate and at least one of an absorption promoter and a catalyst, and wherein the CO2 is converted to solids by precipitation in the absorber, said slurry having the precipitated solids is conveyed to a separating device (F1), in which the solids are separated off, essentially all of at least one of the absorption promoter and catalyst is recycled together with the remaining aqueous phase to the absorber.Type: GrantFiled: December 17, 2007Date of Patent: April 22, 2014Assignee: Sinvent ASInventors: Hallvard F. Svendsen, Finn Andrew Tobiesen, Thor Mejdell, Karl Anders Hoff
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Publication number: 20120148466Abstract: A CO2 absorbent, comprising an aqueous solution of 2-amino-2-methylpropanol (AMP) and 1-(2-aminoethyl)-piperazine (AEP), wherein the molar concentration of AMP is between 4.5M and 2 M, and the molar concentration of AEP is between 0.5 M and 2 M, and a method for capturing CO2 using the absorbent, are described.Type: ApplicationFiled: September 22, 2010Publication date: June 14, 2012Inventors: Thor Mejdell, Karl Anders Hoff, Olav Juliussen, Hallvard F. Svendsen, Andrew Tobiesen, Terje Vassbotn
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Patent number: 7993433Abstract: The invention relates to a new method for removing and recovering of acid gases from a gaseous mixture in an absorption plant by adding an organic acid to a stream of the rich absorbent in the desorber in order to release acid gas by shifting the acid gas equilibrium towards the gas side, and the organic acid is subsequently separated from the absorbent. With this method, the energy consumption of the process is substantially reduced. The invention also relates to an apparatus for performing this method.Type: GrantFiled: June 28, 2006Date of Patent: August 9, 2011Assignee: NTNU Technology Transfer ASInventors: Hallvard F. Svendsen, Finn Andrew Tobiesen, Thor Mejdell, Karl Anders Hoff, Olav Juliussen
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Patent number: 7941175Abstract: A method, system, and apparatus enables lower priority (e.g., access response) messages to be transmitted instead of higher priority (e.g., paging) messages when the lower priority messages become too backlogged in an environment in which the two types of messages share a given capacity. In other words, when an overload situation is detected, the shared capacity is regulated by ensuring that the lower priority messages have at least some bandwidth. For example, if (i) the lower priority messages reach a predetermined number or (ii) a particular lower priority message has been waiting a predetermined period of time, then at least a portion of the higher priority messages are diverted (e.g., delayed or deleted). In one embodiment, the higher priority messages that are initially diverted are a lowest priority subset of the higher priority messages. In another embodiment, a highest priority subset of the lower priority messages are transmitted first as capacity is made available.Type: GrantFiled: December 20, 1999Date of Patent: May 10, 2011Assignee: Telefonaktiebolaget L M Ericsson (PUBL)Inventors: Anders Hoff, Anders Lundström
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Publication number: 20100092359Abstract: The present invention relates to a method for capturing CO2 from exhaust gas in an absorber (A1), wherein the CO2 containing gas is passed through an aqueous absorbent slurry wherein said aqueous absorbent slurry comprises an inorganic alkali carbonate, bicarbonate and at least one of an absorption promoter and a catalyst, and wherein the CO2 is converted to solids by precipitation in the absorber, said slurry having the precipitated solids is conveyed to a separating device (F1), in which the solids are separated off, essentially all of at least one of the absorption promoter and catalyst is recycled together with the remaining aqueous phase to the absorber.Type: ApplicationFiled: December 17, 2007Publication date: April 15, 2010Inventors: Hallvard F. Svendsen, Finn Andrew Tobiesen, Thor Mejdell, Karl Anders Hoff
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Publication number: 20090293722Abstract: The invention relates to a new method for removing and recovering of acid gases from a gaseous mixture in an absorption plant by adding an organic acid to a stream of the rich absorbent in the desorber in order to release acid gas by shifting the acid gas equilibrium towards the gas side, and the organic acid is subsequently separated from the absorbent. With this method, the energy consumption of the process is substantially reduced. The invention also relates to an apparatus for performing this method.Type: ApplicationFiled: June 28, 2006Publication date: December 3, 2009Inventors: Hallvard F. Svendsen, Finn Andrew Tobiesen, Thor Mejdell, Karl Anders Hoff, Olav Juliussen
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Patent number: 6597680Abstract: The present invention provides a method and system for quickly deallocating packet traffic channels. According to exemplary embodiments of the present invention, the capability of performing point-to-multipoint communications is provided on the PTCH by defining a multicast address that all mobiles read. Through the use of a multicast address, a plurality of mobile stations can simultaneously be notified of the termination of PTCH services. As a result, the network can reallocate PTCH resources in a minimum amount of time.Type: GrantFiled: November 16, 1998Date of Patent: July 22, 2003Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Jan Lindskog, Gunnar Rydnell, Anders Lundström, Anders Hoff
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Patent number: 6175557Abstract: A method for transmitting messages using an efficient communications link protocol over an air interface of a cellular communications system is disclosed. A frame in the protocol is divided into a plurality of sections including a header section and a data section. The header section contains a field which indicates what type of information is contained in the frame.Type: GrantFiled: July 21, 1997Date of Patent: January 16, 2001Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: John Diachina, Anthony Sammarco, Anders Hoff
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Patent number: 5734645Abstract: A method for transmitting messages using an efficient communications link protocol over an air interface of a cellular communications system is disclosed. A frame in the protocol is divided into a plurality of sections including a header section and a data section. The header section contains a field which indicates what type of information is contained in the frame.Type: GrantFiled: October 31, 1994Date of Patent: March 31, 1998Assignee: Telefonaktiebolaget LM EricssonInventors: A. Krister Raith, John Diachina, Bengt Persson, Anthony Sammarco, Anders Hoff
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Patent number: 5655215Abstract: A method for transmitting messages using an efficient communications link protocol over an air interface of a cellular communications system is disclosed. A frame in the protocol is divided into a plurality of sections including a header section and a data section. The header section contains a field which indicates what type of information is contained in the frame.Type: GrantFiled: June 7, 1995Date of Patent: August 5, 1997Assignee: Telefonaktiebolaget LM EricssonInventors: John Diachina, Anthony Sammarco, Anders Hoff