Chemical Method for Hydrogen Sulfide Removal from Biogas
Desulfurization is a chemical process for the removal of sulfur from a material. This involves either the removal of sulfur from a molecule (e.g. A=S → A:) or the removal of sulfur compounds from a mixture such as biogas, methane and oil refinery streams. These processes are of great industrial and environmental importance as they provide the bulk of sulfur used in industry, sulfur-free compounds that could otherwise not be used in a great number of catalytic processes, and also reduce the release of harmful sulfur compounds into the environment, particularly sulfur dioxide (SO2) which leads to acid rain, and hydrogen sulfide (H2S) which leads to poison, even death.
Purpose of Desulfurization
Biogas, natural gas, coke oven gas, semi-water gas, petroleum associated gas and waste water contain hydrogen sulfide which is poisonous. Hydrogen sulfide can seriously corrodes equipment and pipelines. Inhalation of trace amounts of hydrogen sulfide can cause disability and endanger life. Therefore, hydrogen sulfide must be removed before it can be used as a clean energy source.
Dry desulfurization system is kind of standard equipment we designed and produced. According to the content of H2S in gas, the actual content of gas, the life cycle of absorbent, and other relevant data, we will specially design the system structure for customers. If you have fixed the dimensions and internal structure, we're also able to manufacture it according to your design drawings.
For real-time monitoring the reaction speed of sulfide and the oxygen in air in the process of regeneration, we added temperature monitoring equipment, this can avoid accident fires in the process of regeneration.(When the content of the entered air gets too large, the exothermic reaction will be violent, and the temperature will be above the sulfur's ignition point, which will lead to accidental fires.) Or you can simply get the absorbent outside the tank, and let it regenerate in the air.
Working principles
Fe2O3 · H2O+3H2S=Fe2S3 · H2O+3H2O
2Fe2S3 · H2O+3O2 = 2Fe2O3 · H2O+6S
Performance and characteristics
1. Simple structure, low investment, long lifetime
2. Easy to manage, reliable operation, dispense with staff on duty, refueling at fixed period, one use one reserve, alternate operation
3. Compared with wet method, need refueling at fixed period
4. High efficiency, applicable to small and medium projects with gas less than 5000m³/day, high precision of desulfurization (lower than 15ppm)
Application:
This dry desulfurization equipment can be used in biogas, livestock farms, starch, papermaking, sewage treatment, alcohol, chemical fiber, pharmaceutical, fertilizer, coking, landfill, gas, natural gas, ceramics, food, corn deep-processing, citric acid and other industries in the purification system.
| Comparison | Dry Desulfurization | Wet Desulfurization | Micro Wet Desulfurization | Biological Desulphurization |
| Application | Small and medium projects with gas less than 5000m³/day; Second high precision desulfurization after other methods | Large Gas Plant up to 100,000 m^3/ day; High sulfur content around 5g/Nm³ | Large-scale | Large-scale, high sulfur-containing gas (100ppm~20000ppm) |
| Power Consumption | None | High | Moderate | Moderate |
| Operating Cost | Moderate, the desulfurizer need to be changed periodically | Moderate | Low | Low cost on electricity bill |
| Land Scale | Small | Full set of equipment for gas desulfurization, regeneration, filtration and melting sulfur, in result, large land is required. | Moderate | Moderate |
| Operation Management | Easy to manage, reliable operation, dispense with staff on duty | Need people on duty to control the operation | Automatic operation, simple maintenance | Automatic operation, simple maintenance |
| Note | Refueling at fixed period, one use one reserve, alternate operation | Many equipment | Less equipment than wet desulfurization | |
| Advantages | Simple structure, low investment, long lifetime, high precision of desulfurization (lower than 15ppm) | It can deal with large amount gas, and the system can run continuously by using PH value to keep the efficiency. | High efficiency by Iron Chelate, small in size, and high processing capacity | High desulfurization efficiency 99.5%, no second pollution, stable performance, suitable for large-scale, high sulfur-containing gas |
Project Display: 100,000 m^3 Large-scale Desulfurization Project in Gaobeidian, Beijing
Company Introduction:
Founded in 2004, Shandong Mingshuo New Energy Technology Co., Ltd. is located in Shandong Province, China. With a registered capital of CNY 88 million and an area of over 16 acres, Mingshuo is dedicated to the development, manufacturing, sales and service providing in environmental protection field.
We mainly specialize in organic waste treatment, biogas plant, desulfurization system, biogas purification, biogas utilization and organic fertilizer systems. As the production base of medium and large biogas equipments in China, our company is highly recommended by China Biogas Association, China Association of Rural Energy Industry, and China Import and Export Commodity Website. Our company has passed the quality management system ISO 9001:2015, environment management system ISO 14001:2015 and occupational health & safety management system OHSAS 18001:2007 standards, with professional environmental engineering construction qualification, safety production license in construction field, and qualifications of Class D1, D2 pressure vessel. Moreover, we have obtained more than 30 patents and participated in the formulation of the national standards for biogas desulfurization equipment.
Management System Certification: ISO9001:2015, ISO14001:2015, OHSAS18001:2007
With the unique design, professional R & D team, and pursuit of better solution, we're able to offer the most suitable and customized professional technical consulting, technical supports and after-sale services for all types of customers according to their different requirements and situations. Our products are widely used in biogas, fertilizer, coking, natural gas, city gas, food, ceramics, and other industries.
Contact: Emma Luan
Tel/Fax: +86 532 8576 2582
Phone: +86 176 6023 9752
Manufacturer & Supplier for Biogas Plant, Desulfurization System, Organic Waste Treatment Equipment etc