R&D

Hydrogen Purification System

High-Purity Hydrogen Production System

The gas produced after ammonia cracking contains both hydrogen and nitrogen.
To enable stable use in fuel cells or industrial processes, purification technology is required to
selectively separate hydrogen and remove nitrogen and residual impurities.
Seowoin is developing a membrane-PSA hybrid hydrogen purification process combining a gas separation membrane and PSA.
This process first separates hydrogen in the primary stage, then produces high-purity hydrogen through a downstream adsorption process.

Technical Overview

  1. 01

    Cracking Mixed Gas

  2. 02

    Gas Separation Membrane

  3. 03

    VPSA

  4. 04

    High-Purity Hydrogen

Ammonia cracking gas is generated as a mixture of hydrogen and nitrogen.
Seowoin's hydrogen purification technology is a downstream process for separating hydrogen at high purity from this mixed gas.

Membrane-PSA
Hybrid Process

  1. 01 Gas Separation Membrane

    The gas separation membrane preferentially separates hydrogen from the mixed gas, reducing the load on the downstream purification process. This aims to achieve miniaturization of the purification unit and improved energy efficiency.

  2. 02 PSA Process

    PSA employs vacuum pressure swing adsorption to remove residual nitrogen and impurities, producing high-purity hydrogen. The aim is to secure hydrogen quality suitable for supply to fuel cells.

  3. 03 Next-Generation Carbon Molecular Sieve Membrane

    Seowoin is also concurrently developing a carbon molecular sieve hollow fiber membrane to enhance hydrogen/nitrogen separation performance. The goal is to simultaneously improve the performance and miniaturization of the purification system by achieving high hydrogen permeability and hydrogen/nitrogen selectivity.

Technical Features

High-Purity Hydrogen Production

Aims to produce high-purity hydrogen required for fuel cells and industrial processes at the downstream stage of ammonia cracking.

Miniaturization

Being developed by combining membrane separation and VPSA to reduce equipment volume compared to conventional adsorption-process-based purification units.

Gas Purification Field Expansion

The hydrogen/nitrogen separation technology can be extended not only to downstream ammonia cracking, but also to industrial hydrogen purification, by-product hydrogen purification, and gas separation processes.

Performance Table

Parameter Performance
Hydrogen Purity ≥ 99.99%
Hydrogen Recovery Rate ≥ 95%
Membrane Hydrogen Permeability ≥ 500 GPU
Membrane H₂/N₂ Selectivity ≥ 400

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