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
Methane Purification Technologies for Landfill Gas, Biogas, and Other Sources
Release Date:
2021-12-21
Source:
Landfill gas, biogas, and other biomass gases refer to methane-containing mixed gases produced through the anaerobic digestion of various organic materials—such as municipal solid waste, crop residues, agricultural by-products, manure, and food waste—by bacterial activity. These gases are classified as renewable natural gas (RNG). The methane content in such biomass gases typically ranges from 40% to 70% by volume, with CO₂ constituting the major component at 20% to 40% by volume, along with minor amounts of N₂, O₂, sulfides, trace volatile organic compounds, and NH₃. 3 , siloxane and other impurity gases.
Biogenic gases such as landfill gas and biogas have lower methane contents compared with conventional natural gas, necessitating further purification before they can be utilized. In response to the compositional characteristics of biogenic gases, Dakot Company has developed a comprehensive suite of methane purification technologies, including pre-treatment adsorption-based impurity removal, dry-process fine desulfurization, and pressure swing adsorption (PSA) for the removal of CO₂, N₂, and O₂. The resulting purified methane product can be directly fed into the natural gas distribution network or further compressed into CNG, or liquefied into LNG, for use as fuel in various types of transportation vehicles, including garbage trucks, heavy-duty trucks, agricultural vehicles, and passenger cars.
Technical Features and Advantages
µ Advanced and mature technology, simple process flow, and stable and reliable operation.
µ High methane purity and yield for the product
µ Low operating energy consumption and high degree of automation
µ Low operating costs and high economic benefits
Application Fields
T Purification of methane from landfill gas, biogas, and other biomass gases
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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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