DKT Energy Technology
National High-Tech Enterprise; Sichuan Provincial Enterprise Technology Center; Class B Qualification For Chemical Engineering Design; Class A Qualification For Environmental Pollution Prevention And Control; Pressure Pipeline GC1 Design Qualification
Pressure Swing Adsorption and Membrane Separation Technologies for Hydrogen Purification
Release Date:
2021-12-21
Source:
Hydrogen is an important green, clean energy source and a key chemical feedstock, and has been widely applied across numerous industries. In industrial hydrogen production, the main processes include hydrocarbon steam reforming, heavy oil or coal gasification, methanol steam reforming, and ammonia decomposition. However, the hydrogen produced by these methods typically has relatively low purity and requires further purification. In addition, other hydrogen-containing mixed gases—such as catalytic cracking dry gas from refineries, reformer off-gas from refineries, purge gas from ammonia synthesis units, methanol tail gas, and crude hydrogen obtained via membrane separation—also necessitate hydrogen recovery and purification. To address the technological and market demands for hydrogen purification, our company has, through years of research and development combined with industrial application, established pressure swing adsorption and membrane separation technologies for hydrogen purification. These technologies enable the efficient, high-yield, low-energy-consumption, and cost-effective production of high-purity hydrogen from hydrogen-containing mixed gases.
(1) Pressure Swing Adsorption (PSA) Hydrogen Purification Technology
Technical Features and Advantages
µ Employs a variety of proprietary, in-house-developed and manufactured specialty adsorbents, delivering performance more than 30% superior to conventional adsorbents.
µ Employs a proprietary, patent-protected pressure swing adsorption process, offering flexible operation, safe and stable performance, and a compact footprint.
µ High hydrogen recovery rate, with low energy consumption and low operating costs for hydrogen purification.
µ Mature hydrogen purification technology with extensive project track record and rich experience in engineering design and operation.
(2) Membrane Separation Technology for Hydrogen Purification
Technical Features and Advantages
µ Employs a high-performance hydrogen-specific separation membrane; the core membrane element boasts an extended service life of over ten years on average and exhibits outstanding physical and chemical properties, as well as exceptional resistance to fouling-induced performance degradation.
µ Adopts a patented design system with high separation efficiency, achieving both high hydrogen recovery rate and high purity.
µ The entire unit has no wear-prone components, is easy to operate, and is typically configured as a skid-mounted system.
Application Fields
Purification of hydrogen from syngas, semi-water gas, town gas, coke oven gas, raw coal gas (lanthanum carbon tail gas), purified gas, fermentation gas, methanol tail gas, formaldehyde tail gas, catalytic cracking dry gas from refineries, reforming tail gas from refineries, and purge gas from synthetic ammonia production, among others.
T Purification of hydrogen in other hydrogen-containing gas mixtures
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Sichuan DKT Energy Technology Co., Ltd. (A subsidiary of Hydrexia (China)) has established the Sichuan Provincial Enterprise Technology Center, the Chengdu Engineering Technology Research Center for Industrial Waste Gas Purification and Utilization, and the China Petroleum and Petrochemical Engineering Gas Separation and Purification Technology Center, and boasts a professional team with high-level innovative R&D capabilities. After more than ten years of continuous research, DKT has successfully developed 30 new adsorbent materials on its own, which are widely used in the petrochemical, natural gas chemical, coal chemical, fine chemical, steel, metallurgical, environmental protection, and new energy industries, thereby establishing a complete industrial chain spanning R&D, production, design, and application.
High-Efficiency Helium Purification and Crude Helium Recovery Technology
For many years, Dakote has been dedicated to the development and application of helium extraction technologies, providing turnkey systems for helium recovery projects that have operated efficiently, safely, and reliably to this day. Specifically targeting helium-bearing feed streams such as natural gas and boil-off gas (BOG), the company has independently developed a patented ambient-temperature separation process for producing high-purity helium. Compared with conventional cryogenic helium separation technology, this approach offers greater operational convenience and significantly reduced energy consumption.
Hydrogen Production Technology
Hydrogen, as the cleanest green fuel, was officially classified as an energy source by the National Energy Administration on April 10, 2020, heralding an explosive surge in demand for hydrogen energy.
In response to the compositional characteristics of syngas generated during the clean, fractionated utilization of modern coal chemical processes and the associated application requirements, a comprehensive integrated technology for syngas separation and purification has been successfully developed. This technology encompasses pre-treatment via temperature swing adsorption (TSA) for impurity removal, sulfur-tolerant wide-temperature shift conversion, organic sulfur hydrolysis, water scrubbing for ammonia removal, MDEA-based desulfurization and decarbonization, fine desulfurization and dechlorination, catalytic deoxygenation, acid-gas desulfurization and sulfur recovery, PSA-based hydrogen enrichment, PSA-based methane concentration, PSA-based CO concentration, and membrane separation. The technology has been successfully implemented in several large-scale coal chemical projects across China and has received unanimous praise from users.
Pressure Swing Adsorption and Membrane Separation Technologies for Hydrogen Purification
Hydrogen is an important green and clean energy source as well as a key chemical feedstock, and has already been widely applied in numerous fields.
Sichuan DKT Energy Technology Co., Ltd.( A subsidiary of Hydrexia (China))
Sichuan DKT Energy Technology Co., Ltd.
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(A subsidiary of Hydrexia (China))
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