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
Wet Oxidation Desulfurization Technology
Release Date:
2021-12-21
Source:
Wet oxidation desulfurization involves using an alkaline solution to absorb hydrogen sulfide from the gas phase, forming sulfide compounds, which are then further oxidized in the liquid phase in the presence of a catalyst and an oxidant to produce sulfur foam. The sulfur foam is subsequently separated and refined into commercial sulfur products. This technology has been widely applied to various feed gases, including raw coal gas, coke oven gas, water gas, semi-water gas, refinery gas, natural gas, acidic tail gas, and biogas. Over more than a decade, Dakot Company has carried out major technological innovations in the core components of this desulfurization process, including novel high-efficiency catalysts, the DKT-GXR reactor, and an integrated multi-functional desulfurization unit that combines cooling, desulfurization, and regeneration. To date, the company has obtained eight published invention patents and utility model patents. Compared with conventional wet oxidation desulfurization, the new technology offers significant advantages in overall capital investment, desulfurization efficiency (for both inorganic and organic sulfur), equipment size, and plant footprint, and has been successfully implemented in numerous coal-to-chemicals desulfurization projects.
Technical Features and Advantages
µ A new desulfurization process employing next-generation wet oxidation combined with the DKT-6 active catalyst
µ A closed-loop process is employed, featuring desulfurization via absorption at ambient temperature and pressure (or under pressure) followed by atmospheric-pressure oxidative regeneration through jet-induced air sparging. This process achieves sulfur recovery as a byproduct without the need for thermal regeneration, and utilizes continuous sulfur melting to produce sulfur, resulting in low operating costs and overall low energy consumption.
µ This process is equipped with a specially formulated composite DKT-6 active catalyst, which not only effectively removes hydrogen sulfide but also exhibits excellent removal performance for organic sulfur compounds and cyanides. The specially formulated composite DKT-6 active catalyst boasts a high working sulfur capacity—more than twice that of comparable desulfurization agents.
µ When combined with a specially formulated active desulfurization agent, this technology can also significantly reduce the formation of desulfurization by-products, thereby lowering capital expenditures for treating these by-products and substantially reducing their operating costs, effectively decreasing production costs.
µ This process, along with the uniquely designed structures of the desulfurization tower and regeneration tank, is paired with a specially formulated DKT-6 composite active catalyst that features self-cleaning properties, effectively preventing tower blockage.
Application Fields
Desulfurization of sulfur-containing gases such as raw coke oven gas, coke oven gas, water gas, semi-water gas, synthesis gas, refinery gas, natural gas, acidic tail gas, and biogas.
T Removal of Sulfur from Other Sulfur-Containing 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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Business:+862885256712 / +862885248678
Switchboard:+862885249678
Company email:dkt@hydrexia.com
Procurement Department Email:dkt-caigou@hydrexia.com
Website:www.scdkt.comAddress: Building 3, Zone A, No. 1 Chengfei Avenue, Qingyang District, Chengdu, Sichuan Province
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Procurement Department：dkt-caigou@hydrexia.com
Email：dkt@hydrexia.com
Business Hotline：+862885256712
Switchboard：+862885249678
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