NEWS

Catalyst Formula
2024-10-30

CrownRe's cutting-edge catalytic materials, such as Ce/Zr mixed oxide/composite and La-doped Alumina, are pivotal in various applications, including automotive emission control, industrial VOCs (Volatile Organic Compounds) mitigation, and natural gas combustion catalysis, serving as effective washcoats.
Three-Way Catalyst (TWC)
In lambda-controlled three-way catalysts, three fundamental reactions occur simultaneously:
2 NO + 2 CO → N2 + 2 CO2
2 CO + O2 → 2 CO2
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
These reactions ensure the conversion of harmful pollutants into harmless compounds.
Catalyzed Gasoline Particulate Filter (cGPF)
Utilizing a honeycomb structure akin to emission catalyst substrates but with alternately blocked ends for enhanced filtration efficiency, the cGPF physically removes particulate matter from exhaust gases. The catalytic coating not only enhances TWC activity but also concurrently converts CO, HC, and NOx.
NOx Storage Catalyst (NSC)
The NSC mechanism begins with the oxidation of NO to NO2 on the catalyst's precious metals, primarily Platinum (Pt). This NO2 is then stored in corresponding materials (e.g., Barium Carbonate BaCO3) until the catalyst reaches its storage capacity.
Operating断续地, the NSC necessitates periodic regeneration using rich exhaust gas (λ<1) to decompose and reduce stored nitrates.
Diesel Oxidation Catalyst (DOC)
DOCs minimize CO and HC emissions by oxidizing them into carbon dioxide and water:
2 CO + O2 → 2 CO2
CxHy + (x+y/4) O2 → x CO2 + (y/2) H2O
Additionally, the oxidation of NO to NO2 facilitates faster NOx reduction with NH3 in downstream SCR technologies.
Catalyzed Diesel Particulate Filter (cDPF)
cDPFs effectively reduce particulate matter, oxidize HC and CO into CO2 and water, and convert NO into NO2 to bolster downstream SCR catalyst performance.
Ammonia Slip Catalyst (ASC)
ASC employs an innovative design to curb slipped NH3 emissions from SCR systems. It integrates NH3 oxidation with SCR functionality.
Selective Catalytic Reduction (SCR)
SCR technology involves two crucial reactions based on NO/NO2 content:
Without NO2: Standard SCR
4 NH3 + 4 NO + O2 → 4 N2 + 6 H2O
With NO2: Fast SCR
4 NH3 + 2 NO + 2 NO2 → 4 N2 + 6 H2O
SCR-Catalyzed Diesel Particulate Filter (SDPF)
SDPFs not only filter particulate matter but also periodically convert them and reduce NOx emissions through:
Without NO2: Standard SCR
4 NH3 + 4 NO + O2 → 4 N2 + 6 H2O
With NO2: Fast SCR
4 NH3 + 2 NO + 2 NO2 → 4 N2 + 6 H2O
CrownRe is dedicated to safeguarding our clean air and beautiful planet. Let's unite and strive for the best.
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Optimizing Gasoline Engine Emissions with CrownRe's Advanced Catalyst Technologies for Passenger Cars and Hybrid Vehicles

Gasoline engines remain the most prevalent internal combustion engines (ICEs) in passenger cars and light-duty vehicles (LDVs). With the rise of hybrid electric vehicles, which combine ICE and battery power, the automotive industry is evolving. Since the introduction of the three-way catalyst (TWC) in the late 1980s and early 1990s, gasoline engine emissions have seen significant reductions.

Fuel-saving technologies, such as gasoline direct injection (GDI) engines, have gained widespread market acceptance, especially with the increasing focus on global warming and greenhouse gas emissions reduction. The latest engine technologies not only improve efficiency but also comply with increasingly stringent global emission standards across all regions and markets. This necessitates sophisticated exhaust gas aftertreatment solutions.

CrownRe develops cutting-edge catalyst technologies to convert and reduce harmful pollutants like hydrocarbons (HC), nitrogen oxides (NOx), ammonia (NH3), and particulate matter (PM). Our catalytic converters are renowned globally for their thermal durability and rapid response time.

Our comprehensive technology portfolio for gasoline, hybrid electric, and alternative fuel vehicles includes:

  • Three-Way Catalysts (TWC): Efficiently convert HC, NOx, and carbon monoxide (CO).
  • Catalyzed Gasoline Particulate Filters (cGPF): Reduce particulate matter while simultaneously converting HC, NOx, and CO.
  • HC Traps: Specifically designed to reduce HC emissions.
  • Electrically Heated Catalysts (EHC): TWC coated on electrically heated substrates for enhanced performance.
  • Secondary Emission Catalysts (SET): Effective in reducing NH3 and N2O emissions.

By leveraging CrownRe's advanced catalyst technologies, automotive manufacturers can significantly optimize gasoline engine emissions, meeting the highest environmental standards while enhancing vehicle performance.


Advanced Diesel Exhaust Aftertreatment Systems by CrownRe for Significant Reduction of NOx, CO, HC, and Particulate Emissions

In response to increasingly stringent emission limits, CrownRe has designed innovative catalytic systems for light-duty diesel vehicles to efficiently reduce oxides of nitrogen (NOx), hydrocarbons (HC), carbon monoxide (CO), particulate emissions, and other pollutants. Our commitment to developing advanced technologies ensures that these systems meet the highest environmental standards.

By leveraging CrownRe's cutting-edge diesel exhaust aftertreatment systems, automotive manufacturers can significantly decrease harmful emissions, complying with the latest regulatory requirements while enhancing vehicle performance and sustainability.


CrownRe's Advanced Diesel Exhaust Aftertreatment Systems: Meeting Tomorrow's Emission Standards Today

As heavy-duty diesel emission regulations for oxides of nitrogen (NOx), particulate matter (PM), hydrocarbons (HC), and carbon monoxide (CO) become increasingly stringent, CrownRe stands at the forefront of innovation. Our commitment to environmental excellence is reflected in our comprehensive portfolio of advanced catalyst technologies, designed to meet the highest standards set by regional greenhouse gas (GHG) regulations worldwide.

To address these challenges, CrownRe boasts a team of highly skilled engineers and chemists who work closely with our customers to develop and demonstrate efficient engineering solutions. We offer unparalleled customer support, including durability aging, testing, and simulation, utilizing our state-of-the-art on-site testing and modeling resources.

CrownRe continues to push the boundaries of exhaust catalyst technology, evaluating and applying our cutting-edge solutions across a wide range of markets, including on-road, non-road, marine, and rail. Our class-leading technologies are designed to enhance fuel efficiency and reduce CO2 emissions, ensuring compliance with the latest regulatory requirements while delivering superior vehicle performance and sustainability.


CrownRe's Custom-Designed Catalysts: Safeguarding Health in Large Cities with Cost-Effective Small Engine Solutions

Small engine applications, particularly in bustling urban areas, can have a profound impact on public health. CrownRe recognizes this challenge and has developed a solution to mitigate its effects. Our custom-designed catalysts not only meet current emission regulations but are also engineered to comply with future legislation, ensuring long-term environmental protection.

What sets our catalysts apart is their cost-effectiveness and high aging stability. By utilizing low precious metal content, CrownRe offers a sustainable and affordable option for reducing emissions from motorcycles and utility engines. This means you can enjoy the convenience and performance of these vehicles without compromising your conscience or contributing to air pollution.

Choose CrownRe's custom-designed catalysts for small engine applications and help create a healthier, cleaner urban environment.


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