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
CO₂ Separation and Recycling Technology in the CCS-EOR Process
Release Date:
2021-12-21
Source:
Dakote Corporation has long been committed to the research and development, engineering design, and application of technologies related to peaking carbon emissions and achieving carbon neutrality. In response to the challenge of capturing and utilizing carbon dioxide and methane—whose global warming potential is 25 times that of CO₂—from various industrial gas streams, the company has developed tailored recovery and utilization technologies. Both domestically and internationally, liquid-CO₂ miscible flooding (CO₂-EOR) is commonly employed to enhance oil recovery; this approach, known as CCS-EOR, represents the most widely adopted and successful application of CCUS technology abroad. However, the associated produced gas from oilfields often contains CO₂ at highly variable concentrations, ranging from 5% to 90%, while the process itself requires substantial supplies of pure CO₂. To address this technical need, the company has developed a dedicated decarbonization adsorbent with high CO₂ adsorption capacity and an exceptional CO₂-to-hydrocarbon separation factor, along with a corresponding advanced pressure swing adsorption process.
Currently, this technology has been successfully deployed in CO₂-enhanced oil recovery and storage projects at two oilfield companies under PetroChina, marking the first large-scale industrial demonstration of CCUS technology in China. In 2021, the project was featured in a special report on CCTV-13, the central television channel, highlighting how its highly efficient, low-cost carbon capture, utilization, and storage capabilities have set an important benchmark for helping the project regions achieve peak carbon emissions and carbon neutrality at the earliest possible date.
Technical Features and Advantages
µ Advanced and mature technology with a simple process flow.
The µ CO₂-specific adsorbent exhibits high adsorption capacity and a high CO₂/hydrocarbon separation factor.
µ Fully accommodates large fluctuations in CO₂ concentration in the feed gas (5–90%)
µ The CO₂ product boasts high purity and yield, as well as high hydrocarbon recovery.
µ High degree of device integration and high level of automation
µ Low costs for the separation and recovery of CO₂ and hydrocarbons, with high economic and ecological benefits.
µ The entire separation process is free of secondary pollution and environmentally friendly.
Application Fields
CO₂ Separation and Recycling in the CCS-EOR Process
T CO₂ separation from biogas, landfill gas, and similar sources
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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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