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    • 1. 发明授权
    • Method and process of producing ammonia from methane hydrate
    • US11072536B2
    • 2021-07-27
    • US15899048
    • 2018-02-19
    • Ji-Cheng Zhao
    • Ji-Cheng Zhao
    • C01C1/04C07C7/00C01B3/48C01B3/02
    • The present invention discloses a method and a process of producing ammonia from methane extracted from methane-hydrate at the site of methane-hydrate extraction. The method and the process comprise coupled chemical reactions. During the first reaction, carbon dioxide reacts methane-hydrate to produce carbon-dioxide-hydrate and methane: carbon dioxide+methane-hydrate⇄carbon-dioxide-hydrate+methane (CO2+CH4-hydrate⇄CO2-hydrate+CH4). The produced methane is reacted with water to produced carbon dioxide and hydrogen via the second reaction: methane+water⇄carbon dioxide+hydrogen (CH4+2H2O⇄CO2+4H2). One embodiment of the second reaction is a combination of the methane steam reforming reaction (CH4+H2O⇄CO+3H2) and the water-gas shift reaction (CO+H2O⇄CO2+H2), both are widely known in the art. The carbon dioxide produced in the second reaction is recycled and used for the first reaction. The hydrogen produced in the second reaction is reacted with nitrogen produced from an air separation process that is known in the art to produce ammonia via the third reaction: nitrogen+hydrogen→ammonia (N2+3H2→2NH3). One embodiment of the third reaction is the well-known Haber-Bosch process. The current invention is related to co-locating the ammonia synthesis at the methane-hydrate extraction sites to minimize the cost of transporting both methane and carbon dioxide over long distances. The process and the associated method also have the advantage of on-site carbon sequestration. The ammonia product produced via the current invention is easily transportable in liquid form from the production sites to the end-use sites as a carbon-free liquid fuel, a fertilizer and a chemical feedstock.
    • 2. 发明申请
    • METHOD AND PROCESS OF PRODUCING AMMONIA FROM METHANE HYDRATE
    • US20190071315A1
    • 2019-03-07
    • US15899048
    • 2018-02-19
    • Ji-Cheng Zhao
    • Ji-Cheng Zhao
    • C01C1/04C07C7/00C01B3/02C01B3/48
    • The present invention discloses a method and a process of producing ammonia from methane extracted from methane-hydrate at the site of methane-hydrate extraction. The method and the process comprise coupled chemical reactions. During the first reaction, carbon dioxide reacts methane-hydrate to produce carbon-dioxide-hydrate and methane: carbon dioxide+methane-hydrate⇄carbon-dioxide-hydrate+methane (CO2+CH4-hydrate⇄CO2-hydrate+CH4). The produced methane is reacted with water to produced carbon dioxide and hydrogen via the second reaction: methane+water⇄carbon dioxide+hydrogen (CH4+2H2O⇄CO2+4H2). One embodiment of the second reaction is a combination of the methane steam reforming reaction (CH4+H2O⇄CO+3H2) and the water-gas shift reaction (CO+H2O⇄CO2+H2), both are widely known in the art. The carbon dioxide produced in the second reaction is recycled and used for the first reaction. The hydrogen produced in the second reaction is reacted with nitrogen produced from an air separation process that is known in the art to produce ammonia via the third reaction: nitrogen+hydrogen→ammonia (N2+3H2→2NH3). One embodiment of the third reaction is the well-known Haber-Bosch process. The current invention is related to co-locating the ammonia synthesis at the methane-hydrate extraction sites to minimize the cost of transporting both methane and carbon dioxide over long distances. The process and the associated method also have the advantage of on-site carbon sequestration. The ammonia product produced via the current invention is easily transportable in liquid form from the production sites to the end-use sites as a carbon-free liquid fuel, a fertilizer and a chemical feedstock.
    • 8. 发明申请
    • Fuel cell system
    • 燃料电池系统
    • US20070128485A1
    • 2007-06-07
    • US11292584
    • 2005-12-02
    • Ji-Cheng ZhaoKe Liu
    • Ji-Cheng ZhaoKe Liu
    • H01M8/04H01M8/10
    • H01M8/04089H01M8/04022H01M8/04037H01M8/04216H01M8/04268H01M8/0662H01M8/083
    • A fuel cell system comprises a hydrogen storage system for storing and releasing hydrogen, a fuel cell in fluid communication with the hydrogen storage system for receiving released hydrogen from the hydrogen storage system and for electrochemically reacting the hydrogen with an oxidant to produce electricity and an anode exhaust. A catalytic combustor is in fluid communication with the fuel cell for receiving the anode exhaust and for catalytically reacting the anode exhaust to produce an offgas having an elevated temperature that is greater than the temperature of the anode exhaust. The heat from the offgas is used to release the hydrogen from the hydrogen storage system. An electrical heater is coupled to the catalytic combustor to enable cold start of the fuel cell and the storage system.
    • 燃料电池系统包括用于储存和释放氢的氢存储系统,与氢存储系统流体连通的用于从氢存储系统接收释放的氢并用于使氢与氧化剂电化学反应以产生电的燃料电池和阳极 排气。 催化燃烧器与用于接收阳极排气的燃料电池流体连通,并且用于使阳极排气催化反应以产生具有大于阳极排气温度的高温的废气。 来自废气的热量用于从氢存储系统释放氢。 电加热器耦合到催化燃烧器以实现燃料电池和存储系统的冷起动。