Activated Carbon For Biogas H2S Removal Heycarbons Manufacturer From China
- Over 20 years of industry experience in pelletized activated carbon manufacturing.
- Annual output 18000 tons
- 16pcs Production Patents.
- A variety of pelletized/impregnated activated carbon types for you to choose.
- Popular in the activated carbon market.
Why Use Activated Carbon In Biogas H2S Removal?
Biogas is an important renewable energy source. It not only provides people with a clean and efficient form of energy, reduces dependence on fossil fuels, but also plays a key role in the resource utilization of organic waste.
By treating biomass waste such as livestock and poultry manure, straw, and kitchen waste, biogas technology effectively reduces environmental pollution and controls greenhouse gas emissions.
At the same time, its byproducts, biogas residues and biogas liquid, can be used as high-quality organic fertilizers, returned to farmland, and realize agricultural circular development. The promotion and application of biogas not only improves rural energy self-sufficiency, but also promotes ecological agriculture and green low-carbon development.
However, in biogas production, the raw biogas contains impurities such as hydrogen sulfide H₂S, volatile organic compounds (VOCs), and siloxane. In particular, hydrogen sulfide, as a toxic gas, will reduce the utilization value of biogas even at extremely low concentrations, and will also corrode back-end equipment such as biogas generators, boilers, and fuel cells.
Therefore, biogas desulfurization is particularly important. Activated carbon, as a renewable material with excellent adsorption capacity, plays a vital role in biogas purification.
How To Use Activated Carbon For Biogas H2S Removal
(1) Fe₂O₃ iron oxide rough desulfurization
The concentration of hydrogen sulfide H₂S is high, up to several thousand ppm. First, use iron oxide desulfurizer (Fe₂O₃) for rough desulfurization to reduce the H₂S concentration to 200-300 ppm.
In this process, iron oxide reacts with H₂S to generate iron sulfide and water, achieving desulfurization; after air reduction, the desulfurizer is regenerated.
Chemical reaction formula
- Desulfurization: Fe₂O₃·H₂O+3H₂S=Fe₂S₃·H₂O+3H₂O
- Regeneration: Fe₂S₃·H₂O+3/2O₂=Fe₂O₃·H₂O+3S
If you want to know more about iron oxide desulfurizer, please click on the link below
Iron Oxide Desulfurizer Fe2O3
(2)Tannin extract rough desulfurization (wet method)
Tannin extract is a typical wet desulfurization process, which uses a solution formed by natural plant extract “tannin” (tannin) and trivalent iron (Fe³⁺) to absorb and oxidize hydrogen sulfide (H₂S) in the gas.
Desulfurization: During the reaction, H₂S is oxidized by Fe³⁺ to elemental sulfur, while Fe³⁺ is reduced to Fe²⁺.
H2S+2Fe3+→S+2Fe2++2H+
Regeneration: Fe²⁺ can be oxidized by air (O2) to regenerate Fe³⁺, so it can be recycled, which is low-cost and environmentally friendly.
4Fe2++O2+4H+→4Fe3++2H2O
(3) Activated carbon fine desulfurization
Activated carbon has an extremely high specific surface area and can efficiently physically adsorb hydrogen sulfide. Metal oxide(CuO, Fe₂O₃, MgO, ZnO) or alkaline substance(KI, NaOH, KOH) impregnated activated carbon can also be desulfurized through chemical reactions and catalytic oxidation, reducing the hydrogen sulfide concentration to no more than 1 ppm, achieving refined desulfurization.
Activated carbon can be used as the final “polishing” link to ensure that the concentration of H₂S of biogas is extremely low; it also has a certain adsorption capacity for other impurities (such as organic sulfur and odor).
Activated Carbon Types For Biogas Purification H2S Removal
Regarding the use of activated carbon for biogas purification, there are several types of activated carbon for you to choose from:
- Bituminous coal pelletized activated carbon
- Anthracite coal pelletized activated carbon
- Anthracite coal pellet activated carbon impregnated with KOH or NaOH or KI
- Anthracite coal columnar activated carbon impregnated with MgO or CuO or Fe2o3 or ZnO
Bituminous VS Anthracite coal pelletized activated carbon
If you want to know the difference between bituminous coal and anthracite pelletized activated carbon in the removal of hydrogen sulfide H2S, you can click on the article below to learn more.
You will learn how to choose activated carbon in high-concentration rapid processing requirements, low-concentration long-term adsorption scenarios, and high-humidity scenarios.
Anthracite VS Bituminous Coal Activated Carbon
| Anthracite pelletized activated carbon for biogas | |
|---|---|
| Diameter | 4mm |
| Moisture | ﹤5% |
| Iodine value | 50-1100mg/g |
| CTC | 60-90 |
| Ash | 8-12% |
| Strength | 95-99% |
| Impreganated | Koh, NaOH, KI, MgO, CuO, ZnO, Fe2o3… |
| Bituminous pelletized activated carbon for biogas | |
|---|---|
| Diameter | 4mm |
| Moisture | ﹤5% |
| Iodine value | 50-1100mg/g |
| CTC | 60-90 |
| Ash | 9-13% |
| Strength | 95-97% |
Bituminous coal pelletized activated carbon impregnated with KOH
Using anthracite column impregnated with KOH to remove hydrogen sulfide, KOH reacts with hydrogen sulfide and the adsorption of activated carbon synergistically, this type of activated carbon has a higher working sulfur capacity than unimpregnated anthracite column activated carbon. Details are as follows:
(1) Alkaline absorption
H₂S reacts with KOH to first generate potassium hydrosulfate (KHS)
H2S+KOH→KHS+H2O
KHS further reacts with excess alkali to generate potassium sulfide (K₂S)
KHS+KOH→K2S+H2O
(2) Catalytic oxidation reaction
Further oxidation reaction in an aerobic environment (such as when containing a small amount of O₂)
K2S+O2+H2O→K2SO4 or 2KHS+O2→K2SO4+H2O
Oxygen can further oxidize the intermediate sulfide/hydrosulfate into potassium sulfate (K₂SO₄) or elemental sulfur. However, the products of the chemical reaction will gradually block the active pores and cause saturation, so the activated carbon for biogas purification needs to be replaced or regenerated.
The impregnation amount of KOH solution can be adjusted according to customer requirements.
KOH Impregnated Activated Carbon – Heycarb
Anthracite coal columnar activated carbon impregnated with MgO
When using anthracite columnar impregnation MgO to remove hydrogen sulfide, it mainly relies on the chemical reaction of MgO with H₂S to convert it into magnesium sulfide (MgS) and water.
H2S+MgO→MgS+H2O
Magnesium sulfide can undergo regeneration reaction in an aerobic environment
2MgS+O2→2MgO+2S
Compared with other types of activated carbon, MgO impregnated columnar activated carbon is economical and affordable. Moreover, Heycarbons factory has mature technology for producing MgO impregnated columnar activated carbon, which is the preferred choice of many customers.
The impregnation amount of MgO solution can be adjusted according to customer requirements.
Copper Iron Magnesium Cu-Fe-Mg Impregnated Activated Carbon
Anthracite coal columnar activated carbon impregnated with CuO
When using anthracite columnar activated carbon to impregnate CuO (copper oxide) to remove hydrogen sulfide (H₂S), it mainly relies on the redox reaction of CuO and H2S to generate cuprous sulfide (Cu₂S) or copper sulfide (CuS) and water.
H2S+CuO→CuS+H2O
The generated CuS is a black precipitate fixed on the carrier.
Another case: formation of cuprous sulfide (partial reduction)
H2S+2CuO→Cu2S+H2O+1/2O2
Under specific temperature and oxygen content control, it is possible to generate Cu2S.
Regenerable: The copper oxide active component can be regenerated by reduction with air or high temperature oxygen, while releasing elemental sulfur (S)
CuS+1/2O2→CuO+S
The impregnation amount of CuO solution can be adjusted according to customer requirements.
Copper Iron Magnesium Cu-Fe-Mg Impregnated Activated Carbon
Co-impregnated columnar activated carbon
Co-impregnation of alkaline substances: We can carry out joint impregnation of alkaline substances according to customer needs, such as joint impregnation of KI and KOH, and test the content of the impregnation solution to achieve the best effect.
Co-impregnation of metal oxides: We can carry out joint impregnation of metal oxides according to customer needs, such as joint impregnation of CuO and ZnO, and test the content of the impregnation solution to achieve the best effect.
Activated Carbons For Biogas Treatments H2S Removal Customer Case
A biogas station in Mongolia, China needs to replace the desulfurizer, a total of two tanks. Each tank needs
- Coke 3-5mm: 0.4 tons
- Fe₂O₃ iron oxide desulfurizer 5mm: 40 tons
- Pelletized activated carbon 4mm: 4 tons
During the filling process, the materials are loaded from the loading hole at the top of the desulfurization tower, and coke, desulfurizer and activated carbon are loaded in sequence. After completion, the tank is sealed. Wire mesh is used as support between different substances. The biogas station uses a double-layer steel wire mesh: 10mm thick steel wire mesh and 1mm thin steel wire mesh.
Biogas containing H2S enters from the bottom of the desulfurization tower and is filtered through coke, desulfurizer, and activated carbon in sequence to complete biogas desulfurization.
Custom Heycarbons Activated Carbon Solution For Biogas H2S Removal
Heycarbons provides a full range of activated solutions at competitive prices.
Other Activated Carbon Solutions
Water Filter
Provide 8*16, 8*30, 12*40, 30*60, 50-150 mesh high iodine value low ash granular carbon for water treatment and water filter – CTO, UDF
Waste water Treatment
Supply of granular and powdered activated carbon for wastewater treatment to remove COD. BOD, heavy metals, organics, acid odors, hydrocarbons, color, etc.
VOCs Removel
Our activated carbon can help remove volatile organic compounds (VOCs) from the air by removing contaminants and impurities.
Gold Recovery
Provides high iodine 6-12, 5-10, 8-16mesh coconut shell granular carbon for gold mining. (CIP, CIL, CIC,)
Air Purification
We provide 4mm, 0.9-8mm pelleted and impregnated pellet activated carbon, and granular carbon for various exhaust gas treatment, vapor recovery, and VOCs removal. biogas H₂S removal, Cigarette filter, etc.
Solvent Recovery
Provide EAC carbon for high-end air purification or various gas solvent recovery, such as benzene toluene, Dichloro methane solvent recovery, tape factory solvent recovery, and others.
Catalyst Carrier
Special process adding Special substance Pellet (Extruded) activated carbon also named Catalyst activated carbons. used for acid gas treatment such as H₂S, water washing regeneration, and high strength.
Food Decolorization
Provide 8*16, 8*30, 12*40 mesh bituminous or briquetting activated carbon for food and water decolorization and purification, such as Sugar, MSG, Juice and wine, Edible oil, glycerin, Sewage decolorization, Corn starch sugar, amino acid, etc.
Steps to Customize Heycarbons Activated Carbon For Biogas H2S Removal
Consultation
By understanding your needs and requirements, our salesmen work with you to submit the appropriate activated carbon solution.
Quotation
Heycarbons expert customer service will provide you with a free quote based on your requirements as well as product specifications and quantities.
Production
Heycarbons has sufficient inventory and strong production capacity, and will report production progress to you from time to time.
Shipping
Heycarbons know you need to receive the product as soon as possible, after rigorous quality checks and protective packaging, by fedex shipping.
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