Patents by Inventor Luwei Chen
Luwei Chen 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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Patent number: 12752262Abstract: The present invention relates to a method of preparing a nano-sized, iron-based catalyst, the method comprising: mixing a solution containing an iron salt with a surfactant to form a mixture; adding a basic salt solution comprising a salt of element selected from the group consisting of: alkali metals, alkaline earth metals, transition metals of groups 3 to 7 and 9 to 11 of the Periodic Table of Elements, lanthanides, and combinations of elements thereof, to the mixture to form a precipitate; and calcining said precipitate to form the iron-based catalyst, said iron-based catalyst at least partially comprising said element of said basic salt. The present invention also relates to a nano-sized, iron-based catalyst prepared by the above method and a process for the production of light olefins using the nano-sized, iron-based catalyst.Type: GrantFiled: December 3, 2020Date of Patent: October 6, 2026Assignees: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, IHI CORPORATIONInventors: Sze Wei Daniel Ong, Luwei Chen, Chee Kok Poh, Jie Chang, Noriki Mizukami, Yoshinori Izumi, Hiroyuki Kamata, Armando Borgna
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Publication number: 20260233183Abstract: The invention relates to a process and an apparatus for producing syngas and/or hydrocarbons. The process involves reacting ammonia and carbon dioxide in a single reactor in the presence of a transition metal catalyst to form one or more products comprising carbon monoxide, hydrogen and one or more hydrocarbons. The invention allows green ammonia as a liquefied hydrogen carrier to be used directly in CO2 conversion.Type: ApplicationFiled: April 20, 2023Publication date: August 13, 2026Inventors: Mingyao Kelvin KWOK, Luwei CHEN, Chee Kok POH, Sin Kim TANG
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Patent number: 12594545Abstract: The present invention relates to a hybrid iron nanoparticle catalyst comprising: i) 1 to 50 wt. % nanoparticles comprising iron and at least one of a metal M selected from the group consisting of alkali metals, alkaline earth metals, transition metals of groups 3 to 7 and 9 to 11 of the Periodic Table of Elements, lanthanides and combinations of M thereof; and ii) 50 to 99 wt. % of an aluminosilicate or silicoaluminophosphate zeolite, based on the total weight of the catalyst, wherein said nanoparticle has a diameter of about 2 to 50 nm. The present invention also relates to a method of preparing the hybrid iron nanoparticle catalyst and a process for the production of light olefins using the hybrid iron nanoparticle catalyst.Type: GrantFiled: December 3, 2020Date of Patent: April 7, 2026Assignees: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, IHI CORPORATIONInventors: Sze Wei Daniel Ong, Luwei Chen, Chee Kok Poh, Jie Chang, Noriki Mizukami, Yoshinori Izumi, Hiroyuki Kamata, Armando Borgna
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Publication number: 20250114777Abstract: There is provided a method of forming a catalyst precursor, including the steps of: (a) forming a precipitate from a slurry, wherein the slurry comprises (i) a mixture of an iron precursor, at least one promotor precursor and a solvent and (ii) a solution of an alkali base; and (b) calcining the precipitate to form the catalyst precursor. There is also provided a catalyst precursor; a method of forming a catalyst; and a catalyst.Type: ApplicationFiled: February 8, 2023Publication date: April 10, 2025Inventors: Luwei CHEN, Chee Kok POH, Jie CHANG, Mingyao Kelvin KWOK, Pin LIM, Armando BORGNA
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Publication number: 20230032512Abstract: The present invention relates to a method of preparing a nano-sized, iron-based catalyst, the method comprising: mixing a solution containing an iron salt with a surfactant to form a mixture; adding a basic salt solution comprising a salt of element selected from the group consisting of: alkali metals, alkaline earth metals, transition metals of groups 3 to 7 and 9 to 11 of the Periodic Table of Elements, lanthanides, and combinations of elements thereof, to the mixture to form a precipitate; and calcining said precipitate to form the iron-based catalyst, said iron-based catalyst at least partially comprising said element of said basic salt. The present invention also relates to a nano-sized, iron-based catalyst prepared by the above method and a process for the production of light olefins using the nano-sized, iron-based catalyst.Type: ApplicationFiled: December 3, 2020Publication date: February 2, 2023Inventors: Sze Wei Daniel Ong, Luwei Chen, Chee Kok Poh, Jie Chang, Noriki Mizukami, Yoshinori Izumi, Hiroyuki Kamata, Armando Borgna
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Publication number: 20230001389Abstract: The present invention relates to a hybrid iron nanoparticle catalyst comprising: i) 1 to 50 wt. % nanoparticles comprising iron and at least one of a metal M selected from the group consisting of alkali metals, alkaline earth metals, transition metals of groups 3 to 7 and 9 to 11 of the Periodic Table of Elements, lanthanides and combinations of M thereof; and ii) 50 to 99 wt. % of an aluminosilicate or silicoaluminophosphate zeolite, based on the total weight of the catalyst, wherein said nanoparticle has a diameter of about 2 to 50 nm. The present invention also relates to a method of preparing the hybrid iron nanoparticle catalyst and a process for the production of light olefins using the hybrid iron nanoparticle catalyst.Type: ApplicationFiled: December 3, 2020Publication date: January 5, 2023Inventors: Sze Wei Daniel Ong, Luwei Chen, Chee Kok Poh, Jie Chang, Noriki Mizukami, Yoshinori Izumi, Hiroyuki Kamata, Armando Borgna
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Patent number: 9908104Abstract: The invention relates to a catalyst, comprising a catalytic element disposed on a substrate, wherein said substrate has formula Ce1-xMxO2, wherein x is between about 0 and about 0.3, optionally between about 0.01 and about 0.3, and wherein M, if present, is a metallic element other than Ce, when used for catalysing a methanation reaction. There is also described use of the catalyst for catalysing a methanation reaction and a method for methanation of a feedstock including carbon monoxide and hydrogen, said method comprising contacting the feedstock with the catalyst.Type: GrantFiled: June 27, 2014Date of Patent: March 6, 2018Assignees: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, IHI CORPORATIONInventors: Hiroyuki Kamata, Luwei Chen, Armando Borgna, Yoshinori Izumi, Jie Chang, Catherine Kai Shin Choong
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Patent number: 9802872Abstract: The invention relates to use of a catalyst comprising particles of nickel dispersed in a porous silica matrix for catalyzing a methanation reaction. There is also described a method for methanation of a feedstock at least comprising gases carbon monoxide and hydrogen, said method comprising contacting the feedstock with the catalyst.Type: GrantFiled: March 28, 2014Date of Patent: October 31, 2017Assignees: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, IHI CORPORATIONInventors: Luwei Chen, Zhi Qun Tian, Armando Borgna, Hiroyuki Kamata, Yoshinori Izumi
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Publication number: 20160151765Abstract: The invention relates to a catalyst, comprising a catalytic element disposed on a substrate, wherein said substrate has formula Ce1-xMxO2, wherein x is between about 0 and about 0.3, optionally between about 0.01 and about 0.3, and wherein M, if present, is a metallic element other than Ce, when used for catalysing a methanation reaction. There is also described use of the catalyst for catalysing a methanation reaction and a method for methanation of a feedstock including carbon monoxide and hydrogen, said method comprising contacting the feedstock with the catalyst.Type: ApplicationFiled: June 27, 2014Publication date: June 2, 2016Inventors: Hiroyuki Kamata, Luwei Chen, Armando Borgna, Yoshinori Izumi, Jie Chang, Catherine Kai Shin Choong
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Publication number: 20160052837Abstract: The invention relates to use of a catalyst comprising particles of nickel dispersed in a porous silica matrix for catalysing a methanation reaction. There is also described a method for methanation of a feedstock at least comprising gases carbon monoxide and hydrogen, said method comprising contacting the feedstock with the catalyst.Type: ApplicationFiled: March 28, 2014Publication date: February 25, 2016Applicant: IHI CorporationInventors: Luwei Chen, Zhi Qun Tian, Armando Borgna, Hiroyuki Kamata, Yoshinori Izumi
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Patent number: 7108804Abstract: In one aspect, the invention provides a catalyst for the production of synthesis gas, the catalyst comprising a) from about 0.1 to about 1.3% by weight of nickel that is supported on modified support, and b) a promoting agent. The catalyst can also comprise a dispersing agent. In another aspect, the invention provides a process for preparing the catalyst above, and a process for the catalytic partial oxidation of methane using the same catalyst.Type: GrantFiled: June 12, 2003Date of Patent: September 19, 2006Assignees: National University of Singapore, ABB Lummus Global Inc.Inventors: Yong Lu, Luwei Chen, Jianyi Lin, Frits M. Dautzenberg
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Publication number: 20040054016Abstract: In one aspect, the invention provides a catalyst for the production of synthesis gas, the catalyst comprising a) from about 0.1 to about 1.3% by weight of nickel that is supported on modified support, and b) a promoting agent. The catalyst can also comprise a dispersing agent. In another aspect, the invention provides a process for preparing the catalyst above, and a process for the catalytic partial oxidation of methane using the same catalyst.Type: ApplicationFiled: June 12, 2003Publication date: March 18, 2004Applicant: National University of SingaporeInventors: Yong Lu, Luwei Chen, Jianyi Lin, Frits M. Dautzenberg