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Clariant's innovative zeolite catalyst solutions: NOx Removal

Clariant China 2025-09-15 10:06:33

Nitrogen oxides (NOx) and nitrous oxide (N2O)₂Nitrous oxide (N2O) is a major pollutant emitted during industrial processes, severely exacerbating air pollution and greenhouse gas emissions. Nitric acid is an essential raw material for fertilizer production; however, its production process emits nitrous oxide, a gas that is almost as harmful to the climate as carbon dioxide.300 times that of carbon dioxide。

More critically, over half of the nitric acid producers worldwide have not yet taken effective measures to remove nitrous oxide from their exhaust gases, and the N emitted during their production process...₂The greenhouse effect produced by O is equivalent toEmitting over 100 million tons of carbon dioxide equivalent annually。Therefore, an effective emission reduction plan is urgently needed.

For N₂O and NO_xEmissions reduction

ClariantMolecular sieve-based catalyst

Clariant has developed a dedicated process for N in industrial applications.₂O and NO_xReductionIron-based molecular sieve EnviCat™ N₂O-series catalystThese catalysts have a significant effect in the three-stage reduction of emissions in nitric acid plants. Using EnviCat N₂The O-series catalyst can almost completely achieve N.₂The reduction of O and other nitrogen oxides (with a maximum efficiency of up to 99%).

Even if some engineering modifications may be required, this series of catalysts can operate at lower temperatures (340-600°C) to remove more than 99% of N.₂O。

Advanced Molecular Sieve-Based Three-Stage Emission Reduction Technology

Efficiently reduce nitrous oxide and nitrogen oxides emissions.

Continuous improvement of catalyst formulation

Exceptional durability: lifespan exceeds 13 years

Extremely low emissions: consistently below 30 ppmv

Clariant's #molecular sieve-based catalyst performs excellently in practical applications.More than 35 units worldwide have adopted this catalyst.Significantly reducing emissions demonstrates the effectiveness and potential of Clariant's molecular sieve technology in addressing industrial emissions.

Iron-modified BETA zeolite is used for

Selective Catalytic Reduction (SCR)

Except N₂In addition to emission reduction, Clariant has also developedIron-modified BETA-type zeolite catalystIt is used for NO._xSelective Catalytic Reduction (SCR). This catalyst uses ammonia as a reducing agent, which can efficiently convert NO._xReduced to harmless nitrogen and water vapor. The unique pore structure and acidity of BETA zeolite, combined with the active sites of iron, promote NO._xAdsorption and activation of ammonia, thereby achieving an efficient reduction reaction.

Compared to traditional SCR catalysts,Clariant's iron-modified BETA-type zeolite has higher activity, selectivity, and thermal stability, thereby improving NOx removal efficiency and reducing operating costs.

Successful Experiences of Emission Reduction Programs Based on Molecular Sieves

The advantages of Clariant's molecular sieve-based catalysts include achieving over 99% N.₂O and NO_xConversion rate, extremely efficient.Multiple devices have been operating continuously and stably for over 13 years, with emissions consistently remaining below 30 ppmv, demonstrating verified durability.

The catalyst can function effectively in various industrial processes and temperature ranges, exhibiting excellent adaptability. Additionally, its formula consisting of silicon, aluminum, oxygen, and iron (excluding precious metals) helps to reduce the ecological footprint.

With over twenty years of industry experience in the three-stage emission reduction field and more than forty years of technical expertise in molecular sieve synthesis and catalysis, Clariant continuously innovates and optimizes its catalyst products. The company is committed to developing advanced molecular sieve structures and optimizing iron ion exchange processes, assisting the chemical industry in achieving sustainable development goals of carbon reduction and efficiency improvement through innovative catalysis.

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Clariant's innovative zeolite catalyst solutions: NOx Removal

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