Sumitomo Seika Chemicals Co., Ltd.

Jfe Steel Corporation

Toshihiko Sumida

Masanori Miyake

Yoshinori Ueda

Yasuhiro Mogi

Hiroaki Sasano

Yoshinori Takata

Hidenori Minami

Akira Kishimoto

Takashi Haraoka

Yoshiaki Imoto

Hitoshi Saima

Tsuguhiko Nakagawa

Itaru Sakai

A hydrogen production system (X) according to the present invention includes a reforming apparatus (Y) having a vaporizer () and a reforming reactor (), and a PSA apparatus (). In the vaporizer () a mixed material (hydrocarbon-based material, water, and oxygen) is heated and vaporized. In the reforming reactor (), steam reforming reaction and partial oxidation reaction of the hydrocarbon-based material take place at a time, so that reformed gas (containing hydrogen) is led out from the vaporized mixed material. In the PSA apparatus (), the reformed gas is introduced into an adsorption tower loaded with an adsorbing agent, so that an unnecessary component in the gas is adsorbed by the adsorbing agent and hence hydrogen-rich gas is led out of the tower, while the unnecessary component is desorbed from the adsorbing agent, so that hydrogen-containing desorbed gas that contains the unnecessary component and hydrogen remaining in the tower is discharged out of the tower. The desorbed gas is burnt in the vaporizer (), and combustion gas generated by burning the desorbed gas is utilized as a heat source to heat the mixed material.

Hydrogen production system and reforming apparatus

A hydrogen manufacturing system for performing offgas flow control includes: a vaporizer () for heating a material mixture containing a hydrocarbon material; a reforming reactor () for generating hydrogen-containing reformed gas by reforming reactions of the material; a PSA separator () for repeating a cycle of adsorption and desorption, where in the adsorption PSA separation is performed with an adsorption tower loaded with an adsorbent to adsorb unnecessary components in the reformed gas and extract hydrogen-enriched gas out of the tower, and in the desorption the offgas containing the unnecessary components from the adsorbent and remaining hydrogen is discharged from the tower; and a buffer tank () for holding the offgas before supplying to the vaporizer. The offgas flow supply from the tank () to the vaporizer is changed continuously over time when the cycle time is changed according to load change on the separator ().

Hydrogen production system and method of controlling flow rate of offgas in the system

A method for treating drain in hydrogen production includes steps of gasifying in a gasifier (), reforming in a reformer (), gas-liquid separation in a gas-liquid separator (), PSA gas separation in a PSA separator () and evaporation in a drain treatment unit (). In the gasifying, a mixed material containing methanol is heated and gasified. In the reforming, reformed gas containing hydrogen is produced from the mixed material by reforming reaction of methanol. In the gas-liquid separation, a liquid component is separated from the reformed gas and discharged as drain. In the PSA gas separation, hydrogen-rich gas and offgas are extracted from the reformed gas by PSA separation using an adsorption tower. In the gasifying, the offgas is burned, and the mixed material is heated by using the combustion gas as heat source. In the evaporation, drain is evaporated using the combustion gas after heating the mixed material as heat source.

Method for treatment of drain in hydrogen production and hydrogen production system

The invention provides an off-gas feeding method that supplies the off-gas discharged from a plurality of adsorption towers (A, B, C) to an off-gas consumption unit (), when performing a pressure swing adsorption process of repeating a cycle including a plurality of steps, to enrich and separate the target gas out of a gas mixture in the adsorption towers (A, B, C) loaded with an adsorbent. The method allows at least one of the plurality of adsorption towers (A, B, C) to discharge the off-gas, in all the steps included in the cycle, so as to continue to supply the off-gas to the off-gas consumption unit () without interruption.

Off-gas feed method and target gas purification system

Product gas (Gpro) is separated from material gas (Gmat) by a PSA process utilizing a plurality of adsorption towers (A-C) each loaded with an adsorbent. The separation of the product gas (Gpro) is performed by repeating a cycle comprising an adsorption step, a decompression step, a desorption step, a cleaning step and a pressurization step. In the decompression step, remaining gas (Grem) as cleaning gas is introduced from one adsorption tower (C) to another adsorption tower (B). The amount of the remaining gas (Grem) introduced is 2 to 7 times the volume of the adsorbent loaded in the adsorption tower (B) as converted into volume at common temperature and under atmospheric pressure. To remove both of carbon monoxide and carbon dioxide from the material gas (Gmat) by a single kind of adsorbent, use is made of zeolite having a faujasite structure with a Si/Al ratio lying in a range of 1 to 1.5 and a lithium-exchange ratio of no less than 95%.

Method for separating hydrogen gas

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Hyogo, Japan

Toshihiko Sumida