VOC Oxidation at Lower Reaction Temperatures

Catalytic incineration

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If the exhaust air stream is compatible with the catalyst

Catalytic incineration is an option if the composition of the VOC-laden exhaust air is known, stable, and suitable for the catalyst. The catalyst lowers the required reaction temperature, thereby enabling exhaust air purification with lower energy consumption than with purely thermal oxidation. Compared to thermal incineration, catalytic incineration processes are more dependent on the chemical suitability of the exhaust air stream(s); compared to Regenerative thermal incineration, the focus is less on heat storage and more on the catalytic reaction. A thorough analysis of the components is crucial: pollutant load, temperature range, and potential catalyst poisons determine whether the processes can be used effectively.

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VEN CLEANAIR KNV Catalytic Incineration Systems

Catalyst, Process Air, and System Control Working in Tandem

VEN CLEANAIR KNV systems are designed specifically for the given exhaust air stream(s). This includes catalyst selection, preheating, air distribution, temperature monitoring, and protection of the catalyst during operation. Thus, the focus is not only on the reaction itself, but also on ensuring that the catalyst can operate continuously under suitable conditions.

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The Benefits of Catalytic Incineration

Catalytic incineration is suitable for defined VOC exhaust air streams in which the constituents, concentrations, and temperature ranges can be reliably assessed. It is precisely this suitability assessment that determines whether catalytic incineration is technically and energetically feasible.

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Lower reaction temperatures

The catalytic converter enables the oxidation of organic compounds at a lower temperature than that required for purely thermal incineration processes.

Design Specifically Tailored to the Exhaust Air Stream(s)

The KNV is not sized on a one-size-fits-all basis, but is tailored to the VOC composition, concentration, temperature range, and process stability.

Lower energy consumption under the right conditions

If the exhaust air stream(s) is compatible with the catalyst, the KNV can significantly reduce energy consumption during operation.

Early Assessment of Critical Ingredients

Catalyst poisons or harmful components are tested even before the design phase to ensure service life and operational safety.

Stable operation with defined processes

When the exhaust gas composition is uniform and operating conditions are constant, the KNV operates in a controlled manner within the intended reaction window.

An Overview of the Incineration Processes

Post-combustion processes reliably oxidize VOCs into CO₂ and water. Depending on the exhaust air stream(s), pollution levels, and energy requirements, three established processes are used. The following overview helps simplify the selection process for applications such as coating, drying, and adhesive application.

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Catalytic incineration (KNV)

Typical Application
Small to medium exhaust air streams with uniform load
Temperature / Technology
250–350 °C thanks to the catalyst
Energy Efficiency
High
Special Features
Compact design, economical with stable VOC levels
Performance range
approx. 500–20,000 Nm³/h

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Thermal incineration (TNV)

Typical Application
Highly fluctuating or high VOC loads, exhaust air containing particulates
Temperature / Technology
> 750 °C, robust thermal process
Energy Efficiency
Moderate
Special Features
Highly tolerant of cyclic loading and particles
Performance range
approx. 800–32,000 Nm³/h

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Regenerative Thermal Oxidation (RTO)

Typical Application
Large exhaust air flow rates with low to medium VOC concentrations
Temperature / Technology
> 800 °C, ceramic heat storage elements
Energy Efficiency
Very high (autothermal operation possible)
Special Features
Maximum heat recovery, low operating costs
Capacity range
approx. 1,000–70,000 Nm³/h

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Industry-Specific Solutions for Clean Exhaust Air

Every industry has its own pollutants, volume flow / airflow volume, and emission limits. Venjakob Umwelttechnik develops exhaust air treatment solutions tailored to these differences—drawing on decades of experience across various industries. The result is systems that reliably comply with emission limits and can be operated cost-effectively.

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We’d be happy to advise you

Would you like to explore our systems, processes, or solutions—or do you already have a specific project in mind? Our representatives are here to assist you with expert advice, technical expertise, and years of experience.

Christian Hoyme

Projects & Sales

Telephone: +49 5066 9806-0
E-mail: ed.tu-bokajnev@egarfna

Cord Brönneke

Projects & Sales

Telephone: +49 5066 9806-0
E-mail: ed.tu-bokajnev@egarfna

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