Extruded
CarboTech Biogas
Mineral coal, catalytically impregnated
An economical grade for high sulphur loads.
- BET surface
- 850m²/gtyp.
- CTC number
- 50%typ.
- Apparent density
- 500 ± 30kg/m³
CarboTech activated carbon · Essen, Germany
CarboTech Activated Carbon Supplied in India
Six grades from CarboTech AC GmbH for removing hydrogen sulphide from biogas, organic compounds from air and process gases, and contaminants from industrial wastewater. Tell us your duty and we will recommend a grade and quote the quantity you need.
- Supplied by
- Gastek Engineering, New Delhi
- Manufacturer
- CarboTech AC GmbH, Essen
- Documentation
- Datasheet for every grade
1,100 m²
of internal surface in one gram of Biogas Premium: about four tennis courts.
Typical BET surface, CarboTech datasheet. Illustration of micropores holding H₂S, not to scale.
What do you need to remove?
01 · Biogas and landfill gas
Activated carbon for biogas H₂S removal
Catalytically impregnated carbons that remove hydrogen sulphide from biogas and landfill gas.
Pelletised
CarboTech Biogas Premium
Bituminous coal, steam activated and impregnated
A very large pore volume and evenly distributed impregnation allow extremely high sulphur loads.
- BET surface
- 1,100m²/gtyp.
- CTC number
- 70%typ.
- Apparent density
- 400 ± 30kg/m³
In a biogas upgrading plant
Where activated carbon and carbon molecular sieves sit
01
Raw biogas
Methane with CO₂, moisture and hydrogen sulphide.
02Activated carbon
H₂S removal
Impregnated activated carbon: CarboTech Biogas or Biogas Premium.
03
CO₂ removal
PSA upgrading on carbon molecular sieve, such as CarboTech SHIRASAGI MSC CT‑350.
CMS grades04
Biomethane
Upgraded renewable gas for fuel or grid use.
Simplified. Drying, compression and other treatment steps depend on the plant.
02 · Organic compounds and traces
Activated carbon for air and gas purification
For organic compounds and trace contaminants present in gases and air at low concentrations.
Extruded · 4 mm
CarboTech DGF 4
Bituminous coal, steam activated
A pore structure suited to removing organic compounds from gases at low concentrations.
- CTC number
- ≥ 50%
- BET surface
- 850m²/gtyp.
- Apparent density
- 490 ± 30kg/m³
Granular · 0.25–0.6 mm
CarboTech DGK 30x60/60
Coconut shell, steam activated
Highly microporous for organic traces at very small concentrations. Mechanically stable, very low in dust and suitable for cabin air filtration.
- Iodine number
- ≥ 1,100mg/g
- CTC number
- 60%typ.
- Apparent density
- 500 ± 30kg/m³
03 · Liquid phase and general duty
Activated carbon for wastewater and general adsorption
For industrial wastewater, landfill leachate and a wide range of organic adsorption duties.
Granular · 0.5–4 mm
CarboTech SE 1-4CT-SE-14
Coconut charcoal, fluidised-bed activated
Activated at about 850 °C in a fluidised-bed furnace for a distinctly microporous structure. Mainly used for industrial wastewater and landfill leachate.
- Iodine number
- 700mg/gtyp.
- Moisture
- ≤ 5%
- Apparent density
- 450 ± 30kg/m³
Granular · 0.6–2.36 mm
CarboTech DGF 8x30 GL
Bituminous coal, steam activated
A uniform pore structure that adsorbs many different organic compounds across a wide range of applications.
- Iodine number
- ≥ 900mg/g
- Ash
- 10%typ.
- Apparent density
- 380 ± 30kg/m³
Datasheet comparison
Compare all six CarboTech grades
Every value CarboTech publishes for these grades, side by side. A dash means the datasheet does not state that property.
| Property | BiogasBiogas | BiogasBiogas Premium | Air and gasDGF 4 | Air and gasDGK 30x60/60 | Water and generalSE 1-4 | Water and generalDGF 8x30 GL |
|---|---|---|---|---|---|---|
| Material | ||||||
| Main use | H₂S removal from biogas and landfill gas | H₂S removal at extremely high sulphur loads | Organic compounds in gases at low concentrations | Organic traces at very small concentrations; cabin air filtration | Industrial wastewater and landfill leachate | Many different organic compounds; wide range of applications |
| Form | Extruded | Pelletised | Extruded | Granular | Granular | Granular |
| Particle size | Not stated | Not stated | 4mm | 0.25–0.6mm30 × 60 mesh | 0.5–4mmtyp. | 0.6–2.36mm8 × 30 mesh |
| Raw material | Mineral coal | Bituminous coal | Bituminous coal | Coconut shell | Coconut charcoal | Bituminous coal |
| Activation | Not stated | Steam | Steam | Steam | Fluidised bed, about 850 °C | Steam |
| Datasheet values | ||||||
| Iodine number | Not stated | Not stated | Not stated | ≥ 1,100mg/g | 700mg/gtyp. | ≥ 900mg/g |
| CTC number | 50%typ. | 70%typ. | ≥ 50% | 60%typ. | Not stated | Not stated |
| BET surface | 850m²/gtyp. | 1,100m²/gtyp. | 850m²/gtyp. | Not stated | Not stated | Not stated |
| Impregnation | ≥ 1.5% | ≥ 1.5% | Not stated | Not stated | Not stated | Not stated |
| Apparent density | 500 ± 30kg/m³ | 400 ± 30kg/m³ | 490 ± 30kg/m³ | 500 ± 30kg/m³ | 450 ± 30kg/m³ | 380 ± 30kg/m³ |
| Moisture | ≤ 15%as packed | ≤ 15%as packed | ≤ 8% | ≤ 5% | ≤ 5% | ≤ 5% |
| Ash | Not stated | Not stated | 10%typ. | 3%typ. | Not stated | 10%typ. |
| Hardness | 98%typ.ball pan | 97%typ.ball pan | 97%typ. | Not stated | Not stated | Not stated |
| Datasheet | PDF datasheet for CarboTech Biogas (opens in a new tab) | PDF datasheet for CarboTech Biogas Premium (opens in a new tab) | PDF datasheet for CarboTech DGF 4 (opens in a new tab) | PDF datasheet for CarboTech DGK 30x60/60 (opens in a new tab) | PDF datasheet for CarboTech SE 1-4 (opens in a new tab) | PDF datasheet for CarboTech DGF 8x30 GL (opens in a new tab) |
Values with ≥, ≤ or ± are CarboTech specification limits; typ. marks a typical property. Particle sizes are nominal ranges. CarboTech may revise specifications without notice, so the current datasheet and your quotation apply.
Why buy through Gastek
Adsorption is what we engineer
Gastek Engineering has designed and manufactured gas generation systems in India since 1993.
- Adsorption engineering
- Every Gastek PSA nitrogen and oxygen plant is an adsorption system. Bed volume, pressure drop and adsorbent life are everyday design questions for our engineers.
- Selection from your duty data
- We review the contaminant, concentration, flow and vessel before recommending a grade, and quote the quantity on that basis.
- CMS and activated carbon together
- Gastek also supplies CarboTech carbon molecular sieves, useful when one project needs both, such as biogas desulphurisation and upgrading.
- The manufacturer's own datasheets
- Each grade links to CarboTech's published datasheet, so you can check every value before you enquire.
Before you enquire
Common questions
Which CarboTech makes these grades?
CarboTech AC GmbH, the activated carbon manufacturer based in Essen, Germany. Each grade on this page links to CarboTech's own datasheet, which carries the Essen address.
Which grade should I use for biogas H₂S removal?
CarboTech Biogas and Biogas Premium are both catalytically impregnated for removing hydrogen sulphide from biogas and landfill gas. Biogas is the economical choice for high sulphur loads; Biogas Premium has a larger pore volume and evenly distributed impregnation for extremely high loads. The better fit depends on H₂S concentration, gas flow and composition, vessel size and the change-out interval you want.
How much does activated carbon cost?
We quote per grade and quantity. Price depends on the grade, order quantity, packing and delivery location. When comparing offers, look at the cost of each change-out and how long the bed lasts between change-outs, not only the price per kilogram.
How much activated carbon will I need?
It follows from the contaminant load and how much of that contaminant the carbon holds under your conditions: concentration multiplied by flow and the change-out interval you want, divided by the carbon's working capacity. The bed must also give enough contact time to meet the outlet limit. Share the inputs below and we will work it out.
How do coconut-shell and coal-based carbons differ?
Raw material and activation shape the pore structure. The coconut-based grades here, DGK 30x60/60 and SE 1-4, are highly microporous; DGK 30x60/60 targets organic traces at very small concentrations and is mechanically robust with very little dust. Among the coal-based grades, DGF 8x30 GL has a uniform pore structure that adsorbs many different organic compounds. The contaminant and process should decide the grade, not the raw material alone.
What do iodine number, CTC number and BET surface area indicate?
They are standard indicators of adsorption capacity. Iodine number is the milligrams of iodine adsorbed per gram of carbon and reflects micropore capacity. CTC number is the percentage of carbon tetrachloride adsorbed by weight and is commonly used for gas-phase grades. BET surface area, in m²/g, is measured by nitrogen adsorption. Use them to compare grades; service life depends on the contaminant and operating conditions.
What safety precautions apply to activated carbon vessels?
CarboTech's datasheets warn that wet activated carbon removes oxygen from the surrounding air, so oxygen in closed or partly closed vessels and rooms can fall to hazardous levels. Follow confined-space entry procedures and the warnings in CarboTech's safety data sheets.
Request a quote
Tell us what you need to remove
Approximate figures are enough to start. If you already use activated carbon, the current grade and change-out interval give the clearest comparison.
- Application and contaminant
- What must be removed, such as H₂S, organic vapours or dissolved organics, and from which gas or liquid.
- Concentration
- The inlet level and the outlet limit the treated stream must meet.
- Flow and conditions
- Gas or liquid flow, with operating temperature, pressure and humidity.
- Vessel or filter
- Bed dimensions and allowable pressure drop, plus the current grade and change-out interval if carbon is already in use.
- Quantity
- The initial fill and any expected annual replacement volume.