Korea Institute of Energy Research

Hyung-chul Yoon

Jong-Nam Kim

Ji-haeng Yu

Sang-Sup Han

Hee-Tae Beum

Chung-yul Yoo

Kanghee Cho

Jong Hoon Joo

Sun Hyung Kim

Hyung Kuk Ju

The present disclosure relates to a pressure swing adsorption apparatus for hydrogen purification from decomposed ammonia gas and a hydrogen purification method using the same, and more particularly, the pressure swing adsorption apparatus of the present disclosure includes a plurality of adsorption towers including a pretreatment unit and a hydrogen purification unit wherein the adsorption towers of the pretreatment unit and the hydrogen purification unit are packed with different adsorbents, thereby achieving high purity hydrogen purification from mixed hydrogen gas produced after ammonia decomposition, making it easy to replace the adsorbent for ammonia removal, minimizing the likelihood that the lifetime of the adsorbent in the hydrogen purification unit is drastically reduced by a very small amount of ammonia, and actively responding to a large change in ammonia concentration in the raw material. Additionally, a hydrogen purification method using the pressure swing adsorption apparatus of the present disclosure physically adsorbs and removes impurities such as moisture (HO), ammonia (NH) and nitrogen (N) included in mixed hydrogen gas produced after ammonia decomposition below extremely small amounts, thereby achieving high purity hydrogen purification with improved selective adsorption of moisture, ammonia and nitrogen and maximized hydrogen recovery rate and productivity. In addition, since the temperature swing adsorption process is not introduced, there is no need for a heat source for regeneration, thereby reducing the driving cost.

Pressure swing adsorption apparatus for hydrogen purification from decomposed ammonia gas and hydrogen purification method using the same

The present disclosure relates to an ammonia synthesis apparatus, and more particularly, to an electrochemical ammonia synthesis apparatus using an aqueous solution or a molten liquid of an alkali metal as an electrolyte. According to one or more embodiments, when an aqueous solution or a molten liquid of an alkali metal is used as an electrolyte in an ammonia synthesis apparatus, compositions, sizes, and shapes of an electrode and an electrolyte may be easily controlled, and thus a yield of ammonia synthesis may improve.

Apparatus for synthesizing ammonia

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Daejeon, South Korea

Hyung-chul Yoon