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公开(公告)号：US20230348264A1
公开(公告)日：2023-11-02
申请号：US17793719
申请日：2020-12-07
发明人： Yan LI , Lei GENG , Zhenhua LV , Longli LI
IPC分类号： C01B32/164 , C01B32/162 , C01B3/26 , B01J8/02 , B01J8/00
CPC分类号： C01B3/26 , B01J8/001 , B01J8/0242 , B01J8/0278 , C01B32/162 , C01B32/164 , B01J2208/00539 , B01J2208/00752 , C01B2203/0277 , C01B2203/1082 , C01B2203/1241
摘要： A method of continuously producing carbon nanotubes and hydrogencomprising: preparing a catalyst precursor, and pre-reducing the catalyst precursor; adding a height of carbon nanotubes in a reactor as a stacked bed and electrically heating the carbon nanotubes to the reaction temperature of a vapor deposition furnace in the presence of a protective gas; putting the pre-reduced catalyst or unreduced catalyst precursor into the reactor; under the condition of stirring the solid materials in the reactor, introducing a carbon source gas, reacting same by means of the vapor deposition furnace to generate new carbon nanotubes and hydrogen, continuously discharging a part of carbon nanotubes and a part of hydrogen, and repeating these steps to achieve the continuous preparation of carbon nanotubes. The device has a high utilization rate of raw materials, can manufacture a large batch of carbon nanotubes with a high purity at one time, and is suitable for large-scale industrial production.
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公开(公告)号：US20210395090A1
公开(公告)日：2021-12-23
申请号：US16605834
申请日：2018-03-27
发明人： Yan LI , Lei GENG , Zhenhua LV , Longli LI , Zhongcun BAO
IPC分类号： C01B32/164 , B01J8/40 , B01J8/18 , B01J8/00 , B01J23/745 , B01J23/755 , B01J23/75
摘要： An apparatus for continuous preparation of carbon nanotubes, based on a fluidized bed reactor. The fluidized bed reactor comprises an annular varying diameter zone, a raw material gas inlet, a catalyst feeding port, a protective gas inlet, and a pulse gas controller. The annular varying diameter zone is located at a zone from a ¼ position starting from the bottom to the top. The pulse gas controller is disposed at the arc-shaped top portion of the annular varying diameter zone. The catalyst feeding port is located at the top of the fluidized bed reactor. The raw material gas inlet and the protective gas inlet are located at the bottom of the fluidized bed reactor. The device is also provided with a product outlet and a tail gas outlet. The device has a simple structure and low cost, is easy to operate, has a high raw material utilization rate, can effectively control the problem of carbon deposition on the inner wall of a primary reactor, can manufacture high-purity carbon nanotubes, and is suitable for large-scale industrial production.
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公开(公告)号：US20170144887A1
公开(公告)日：2017-05-25
申请号：US15323839
申请日：2015-07-31
发明人： Yan LI , Sijiao XU , Zhenhua LV , Lei GENG
CPC分类号： C01B32/162 , B01J8/24 , B03C1/286 , B03C1/288 , B03C1/30
摘要： The disclosure discloses an apparatus for continuous preparation of carbon nanotubes, comprising a main reactor, a separator and a return pipe, wherein the main reactor comprises a raw gas inlet, a return feed inlet, a protective gas inlet and a reaction material outlet; the separator is fluid communicated with the reaction material outlet of the main reactor at a top of the separator; a magnetic separating unit is arranged in the top of the separator at a side proximal to the main reactor; a product outlet and a material recycling port are arranged at a bottom of the separator respectively; the product outlet is located at a side distal to the main reactor; the recycling port is located at a side proximal to the main reactor; one end of the return pipe is fluid communicated with the material recycling port of the separator, and the other end is fluid communicated with the return feed inlet of the main reactor; the apparatus further comprises a tail gas outlet. This apparatus can realize continuous production of carbon nanotubes with increased utility of catalyst and raw materials at decreased cost, suitable for large-scale industrial production.
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