In recent years, air pollution control technologies in China have evolved rapidly to meet increasingly strict environmental standards. One widely adopted and highly effective solution for treating low- to medium-concentration volatile organic compounds (VOCs) is the activated carbon adsorption–desorption catalytic combustion system.

At Chaori Purification, we specialize in engineering and manufacturing this integrated solution to meet the unique demands of industries generating complex organic waste gases. So, how does this system work, and what level of purification can it achieve? Let’s take a closer look.

How the System Works

This equipment combines three core processes—adsorption, desorption, and catalytic combustion—into a seamless cycle designed to treat VOCs that are unsuitable for direct combustion due to their low concentrations.

Step 1: Adsorption Phase

Low-concentration VOCs are first drawn into an activated carbon bed, where organic molecules are adsorbed onto the porous surface of the carbon. This stage handles large air volumes while concentrating the VOCs into the carbon matrix.

Step 2: Desorption Phase

Once the carbon reaches its adsorption limit, the system initiates thermal desorption. A small volume of heated air or inert gas is used to strip the VOCs from the carbon, creating a high-concentration, low-flow gas stream suitable for efficient treatment.

Step 3: Catalytic Oxidation

The concentrated exhaust is then introduced into a catalytic combustion chamber, where it is heated to 280–300°C. In the presence of a catalyst (typically noble metals like platinum or palladium), the VOCs are oxidized into harmless carbon dioxide and water vapor—without flame combustion, making the process safer and more energy-efficient.

System Components

Activated carbon adsorption unit

Desorption heating system (electric or gas)

Catalytic combustion reactor

Heat-insulated ducts and chambers

Temperature and gas concentration sensors

Programmable logic controller (PLC) with safety alarms

Purification Performance and Key Benefits

High VOC Removal Efficiency

Removal rates typically exceed 95%, ensuring compliance with most industrial emission standards.

Energy Recovery

The heat released during catalytic combustion is recycled to support the desorption process, greatly reducing energy consumption.

No Secondary Pollution

The system does not produce hazardous byproducts such as NOx, dioxins, or sludge—making it environmentally safe.

Stable Operation & Smart Control

Equipped with real-time monitoring and intelligent automation, the system supports fault detection, emergency shut-off, and long-term stable operation.

Compact & Modular Design

The system is space-efficient and can be customized based on factory layout and exhaust characteristics.

Ideal Applications

This system is especially suited for industries that emit low-concentration, high-volume VOCs, including:

Chemical manufacturing

Paint, coatings, and printing operations

Rubber and plastics processing

Pharmaceutical and cosmetic production

Semiconductor and electronics assembly

Automotive parts painting and finishing

Why Choose Chaori Purification?

At Jiangsu Chaori Environmental Protection Equipment Co., Ltd., we provide fully integrated VOC control solutions tailored to your operational needs. With decades of experience and a strong focus on cost-efficiency, safety, and environmental responsibility, our systems are engineered to help you:

Reduce pollutant emissions

Lower energy and maintenance costs

Improve workplace air quality

Stay compliant with local and international environmental regulations