MARKET INSIGHTS

Global catalysts for diesel engines market size was valued at USD 12.5 billion in 2024. The market is projected to grow from USD 13.3 billion in 2025 to USD 18.7 billion by 2032, exhibiting a CAGR of 4.7% during the forecast period.

Catalysts for diesel engines are emission control systems designed to reduce harmful pollutants such as nitrogen oxides (NOx), carbon monoxide (CO), and particulate matter (PM). These catalysts include diesel oxidation catalysts (DOCs), selective catalytic reduction (SCR) systems, and catalyzed diesel particulate filters (CDPFs). While DOCs oxidize CO and hydrocarbons, SCR systems utilize urea-based solutions to break down NOx emissions. The technology plays a critical role in meeting stringent environmental regulations such as Euro 6 and EPA Tier 4 standards.

The market growth is primarily driven by tightening emission norms worldwide and the rising adoption of diesel engines in commercial vehicles. However, the shift toward electric vehicles poses a long‑term challenge. Key players like BASF, Johnson Matthey, and Umicore continue to innovate, focusing on advanced catalyst formulations to improve efficiency. For instance, in March 2024, BASF launched a new high‑performance SCR catalyst to meet ultra‑low NOx requirements in heavy‑duty applications.

Market Forecast (2025-2034)

Year	Market Size (USD Billion)	Notes
2025	13.3	Base year
2026	13.9	Estimated growth
2034	20.5	Projected CAGR 4.7%

Top 10 Companies

1. BASF SE (Germany)

Headquarters: Ludwigshafen, Germany

Key Offering: Advanced SCR catalysts, DOCs, and integrated after‑treatment systems for heavy‑duty and medium‑duty diesel engines.

BASF’s recent launch of a high‑performance SCR catalyst in March 2024 demonstrates its commitment to ultra‑low NOx solutions. The catalyst features a novel platinum‑free formulation that maintains conversion efficiency while reducing precious metal usage.

Sustainability Initiatives:

• Reduction of platinum group metal loadings to lower environmental impact.
• Investment in research for carbon‑neutral catalyst manufacturing.
• Partnerships with OEMs to achieve Euro 7 compliance.

2. Johnson Matthey Plc (United Kingdom)

Headquarters: London, United Kingdom

Key Offering: High‑efficiency SCR catalysts and diesel particulate filters with advanced wash‑coat technologies.

Johnson Matthey focuses on improving catalyst durability and lowering operating temperatures, enabling better performance in cold climates.

Sustainability Initiatives:

• Development of low‑temperature catalysts to reduce energy consumption.
• Commitment to carbon neutrality by 2040.
• Collaboration with automotive OEMs on green mobility solutions.

3. Umicore N.V. (Belgium)

Headquarters: Brussels, Belgium

Key Offering: Integrated after‑treatment solutions combining DOC, DPF, and SCR for heavy‑duty applications.

Umicore’s research centers are pioneering the use of perovskite materials to decrease precious metal reliance.

Sustainability Initiatives:

• Investment in perovskite catalyst technology.
• Carbon‑neutral production processes.
• Partnerships with global OEMs to meet Euro 7 targets.

4. Cataler Corporation (Japan)

Headquarters: Tokyo, Japan

Key Offering: Tailored SCR and DOC systems for Japanese commercial vehicles and marine engines.

Cataler’s solutions emphasize high durability and low maintenance for harsh operating conditions.

Sustainability Initiatives:

• Development of sulfur‑tolerant catalysts.
• Use of renewable feedstocks in catalyst production.
• Collaboration with Japanese automakers on low‑emission fleets.

5. Nett Technologies Inc. (Canada)

Headquarters: Toronto, Canada

Key Offering: Stationary diesel engine after‑treatment systems for power generation and industrial applications.

Nett Technologies focuses on robust catalysts that resist sulfur poisoning and operate efficiently at low exhaust temperatures.

Sustainability Initiatives:

• Development of low‑temperature SCR catalysts.
• Commitment to reducing sulfur content in fuels.
• Partnerships with power utilities to meet Tier 4 standards.

6. Clean Diesel Technologies, Inc. (CDTi) (USA)

Headquarters: Houston, Texas, USA

Key Offering: Next‑generation DOCs and DPFs for medium‑duty trucks.

CDTi’s catalysts are engineered for rapid startup performance and low NOx emissions.

Sustainability Initiatives:

• Reduction of catalyst weight to improve vehicle fuel economy.
• Use of recycled precious metals.
• Collaboration with fleet operators on retrofit programs.

7. Kunming Sino‑Platinum Metals Catalyst Co., Ltd. (China)

Headquarters: Kunming, China

Key Offering: Cost‑effective SCR catalysts for the Chinese domestic market.

The company specializes in high‑volume production of platinum‑free catalysts to meet China VI standards.

Sustainability Initiatives:

• Investment in platinum‑free catalyst research.
• Reduction of carbon footprint in manufacturing.
• Partnership with Chinese OEMs to accelerate compliance.

8. Perkins Engines Company Limited (United Kingdom)

Headquarters: Warwick, United Kingdom

Key Offering: Diesel engines with integrated after‑treatment solutions for construction and agricultural machinery.

Perkins focuses on combining engine design with catalyst technology to deliver low‑emission heavy‑duty solutions.

Sustainability Initiatives:

• Development of low‑NOx engines.
• Use of advanced materials to reduce engine weight.
• Collaboration with agricultural equipment manufacturers.

9. Tenneco Inc. (United States)

Headquarters: Irvine, California, USA

Key Offering: Integrated after‑treatment systems including SCR and DPF for heavy‑duty trucks.

Tenneco’s catalysts emphasize durability and low operating temperatures.

Sustainability Initiatives:

• Research on low‑temperature catalysts.
• Commitment to reducing CO2 emissions from production.
• Partnerships with OEMs on green fleet programs.

10. Denso Corporation (Japan)

Headquarters: Nagoya, Japan

Key Offering: Advanced DOC and SCR catalysts for heavy‑duty and medium‑duty diesel engines.

Denso’s solutions target high conversion efficiency and low catalyst weight.

Sustainability Initiatives:

• Development of lightweight catalyst structures.
• Use of renewable materials in catalyst components.
• Collaboration with OEMs on emission‑reduction strategies.

Global Catalysts for Diesel Engines Market – View in Detailed Research Report

Global Catalysts for Diesel Engines Market – View in Detailed Research Report

Outlook

The diesel catalyst market is poised for steady growth driven by tightening emission regulations and the continued demand for commercial and heavy‑duty vehicles. While electrification presents a long‑term challenge, the heavy‑duty segment remains resilient, offering sustained opportunities for catalyst innovation and retrofit projects.

Future Trends

• Development of high‑performance SCR catalysts with lower precious metal loadings.
• Integration of catalysts with hybrid powertrains to address cold‑start emissions.
• Expansion of retrofit markets in emerging economies to meet evolving emission standards.
• Advancements in non‑precious metal catalyst materials such as zeolites and perovskites.
• Increased focus on sustainability, including carbon‑neutral manufacturing and recycling of catalyst components.