Activated Carbon for Dioxin Removal (DIOSORB Series)

Activated carbon is an effective material for removing dioxins from various sources. 

Let’s explore how it works and its applications:

1. Wooden Activated Carbon Production:

• Researchers have proposed a two-step process for creating wooden activated carbon from different biomass waste materials.

• The first step involves carbonization, which starts around 250°C and finishes at 500°C for materials like coconut shell, pinewood, and plywood.

• Corn straw has a lower carbonization temperature due to its higher ash content.

• During carbonization, volatile compounds like CH₄, CO, CO₂, and hydrocarbons are released.

• Pinewood and plywood yield higher amounts of CH₄ and CₘHₙ compared to coconut shell and corn straw.

• The optimized parameters for biomass waste carbonization are 500°C and a residence time of 30 minutes.

• Furfural and phenol derivatives are the main tar compounds produced during waste carbonization.

• Using 20% of volatiles achieves the lowest pollution and provides heat for biomass waste carbonization.

• In the second step, steam activation at 800°C for 30 minutes results in optimized activated carbon (AC) yields and excellent dioxin adsorption quality.

2. Powdered Activated Carbon (PAC) for Dioxin Removal:

• In waste incineration, powdered activated carbon is recommended for dioxin and mercury removal.

• PAC increases the contact surface area between pollutants and activated carbon, achieving up to 99% removal efficiency.

3. Flue Gas Treatment:

• PAC is also used for treating flue gas streams in coal-fired power stations and steel production & recycling facilities.

• It is considered the best technology for mercury, furans, and dioxin removal from flue gas in treatment systems (scrubbers).

In summary, activated carbon plays a crucial role in mitigating dioxin pollution, making our environment cleaner and safer.