公开(公告)号：US20240367967A1

公开(公告)日：2024-11-07

申请号：US18683936

申请日：2022-08-03

Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY

Inventor： Hajime KAWANAMI ,  Yuichiro HIMEDA

IPC: C01B3/22 ,  F17C5/06

Abstract: A purpose of the present invention is to provide a pumpless high-pressure hydrogen supply system capable of supplying high-pressure hydrogen to a fuel cell vehicle, etc., when needed without using a compressor or the like, and a method for the system. The present invention relates to a high-pressure hydrogen supply system that obtains a mixed gas of hydrogen and carbon dioxide by dehydrogenation of formic acid using a complex catalyst, separates the hydrogen therefrom, and supplies the hydrogen at a pressure of 5 MPa or more. By obtaining the mixed gas at a pressure of 5 MPa or more by dehydrogenation and cooling the mixed gas by a separator while maintaining this pressure at 0.4 MPa or more, gas components other than hydrogen are phase separated as liquids or solids and removed. The separated hydrogen is raised in purity by pressure fluctuation adsorption, continuously sent to a pressure accumulator, and stored at a pressure of 70 MPa or more.

公开(公告)号：US20240076183A1

公开(公告)日：2024-03-07

申请号：US18272890

申请日：2022-01-14

Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY

Inventor： Hajime KAWANAMI

IPC: C01B3/22 ,  B01D11/04 ,  B01D53/00 ,  C01B3/50

CPC classification number: C01B3/22 ,  B01D11/0403 ,  B01D11/0492 ,  B01D53/002 ,  C01B3/506 ,  B01D2256/16 ,  B01D2257/504 ,  C01B2203/0277 ,  C01B2203/046 ,  C01B2203/0475 ,  C01B2203/1211

Abstract: Provided are a method by which hydrogen can be continuously and efficiently produced through a dehydrogenation reaction of a formic acid solution even at a low concentration and/or low grade, and a system therefor. This method involves a reaction step for, while supplying formic acid, catalytically degrading the formic acid into carbon dioxide and hydrogen to thereby continuously produce hydrogen. This method is characterized by involving an extraction step for extracting formic acid from the formic acid solution serving as the starting material with the use of carbon dioxide obtained in the reaction step, and then supplying the formic acid to the reaction step.

公开(公告)号：US20180162796A1

公开(公告)日：2018-06-14

申请号：US15577651

申请日：2016-05-27

Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY ,  NISSAN CHEMICAL INDUSTRIES, LTD.

Inventor： Hajime KAWANAMI ,  Takayuki ISHIZAKA ,  Hitomi FUJIYAMA ,  Nobuyuki KAKIUCHI ,  Norihito SHIGA

IPC: C07C29/34 ,  C07C31/125 ,  B01J31/02

CPC classification number: C07C29/34 ,  B01J31/0207 ,  C07C31/125

Abstract: A method for preparing a branched alcohol by dimerizing an aliphatic monoalcohol having three or more carbon atoms in the presence of a base and a catalyst. The dimerization reaction is performed under atmospheric pressure while injecting a hydrogen gas. With this method, it is possible to obtain a dimerized alcohol with excellent yield even when using a branched aliphatic monoalcohol as the starting material.