Hydrogen is an important green and clean energy and an important chemical raw material, and has been widely used in many fields. Industrial hydrogen production processes mainly include hydrocarbon steam reform, heavy oil or coal gasification, methanol steam reform and ammonia decomposition. The purity of hydrogen obtained by these methods is not high enough and needs further purification. In addition, some other hydrogen-containing gas mixtures, such as refinery FCC dry gas, refinery reforming tail gas, synthetic ammonia purge gas, methanol tail gas and crude hydrogen from membrane separation, need recovery and purification of hydrogen. In order to meet the market demand for hydrogen purification, DKT’s pressure swing adsorption (PSA) and membrane separation technologies, after years of R&D and industrial application practice, can obtain high-purity hydrogen product from hydrogen-containing gas mixture with high efficiency, high recovery, low energy consumption and low cost.

1、Hydrogen purification by PSA

Technical features and advantages:

 - DKT’s independently developed and produced special adsorbents can improve the performance by more than 30% compared with conventional adsorbents;

 - With DKT’s independently developed patented PSA technology, the plant is flexible, safe and stable in operation, and occupies a small area;

 - High hydrogen recovery, low energy consumption and low operating cost for purifying hydrogen;

 - The hydrogen purification technology is proved with many engineering performances, and rich experience in engineering design and operation have been accumulated.

2、Hydrogen purification by membrane separation

Technical features and advantages:

- Using high-performance hydrogen-specific separation membrane, and the membrane core has a long service life, with an average of more than ten years. The membrane core has excellent physical and chemical properties and special anti-pollution and anti-degradation ability;

- Patented design system is adopted, with high separation efficiency and high hydrogen recovery and purity;

- The whole plant has no wearing parts and is easy to operate, mostly with a skid-mounted structure.

Application:

- Purification of hydrogen in syngas, semi-water gas, city gas, coke oven gas, waste gas (semi-coke tail gas), purified gas, fermentation gas, methanol tail gas, formaldehyde tail gas, refinery FCC dry gas, refinery reforming tail gas, synthetic ammonia purge gas, etc.

- Purification of hydrogen in other hydrogen-containing gas mixtures.