Marine Selective Catalytic Reduction System Market Size & Share, by Application (Commercial, Offshore, Recreational, Navy); End-User (Newbuilds, Retrofits); Type (Small Marine Engines, Medium Marine Engines, Large Marine Engines); Component (Catalyst, Reactor, Pump, Injector, Sensor, Control Unit) - Global Supply & Demand Analysis, Growth Forecasts, Statistics Report 2024-2036

  • Report ID: 5782
  • Published Date: Mar 01, 2024
  • Report Format: PDF, PPT

Global Market Size, Forecast, and Trend Highlights Over 2024-2036

Marine Selective Catalytic Reduction System Market size is expected to reach USD 10 Billion by the end of 2036, growing at a CAGR of 6% during the forecast period, i.e., 2024-2036. In the year 2023, the industry size of marine selective catalytic reduction systems was USD 5 Billion. The increasing focus on environmental regulations and the need to achieve higher energy efficiency in marine transportation is driving the demand for selective catalytic reduction systems. The growing concerns regarding air pollution and greenhouse gas emissions are encouraging shipping companies to adopt selective catalytic reduction systems to reduce their carbon footprint. As observed by Research Nester analysts in studies conducted, the catalytic converter is capable of reducing more than 90 % of harmful exhaust gases, and its price is approximately twice as low as that of a catalytic converter made of noble metal, thus expanding the market share around the globe.

Moreover, the implementation of stricter emission standards by organizations such as the International Maritime Organization (IMO) and regional regulatory bodies is expected to further boost the adoption of marine selective catalytic reduction systems. These systems help vessels meet these stringent emission limits and avoid penalties or fines for non-compliance. In particular, the IMO's GHG Strategy for 2024 envisages a reduction in the carbon intensity of international shipping by an average of 40 % across international shipping by 2030, to reduce CO 2 emissions per transport work.

Marine Selective Catalytic Reduction System Market
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Marine Selective Catalytic Reduction System Sector: Growth Drivers and Challenges

Growth Drivers

  • Global Trade Growth- The growth of international trade and shipping has led to a surge in demand for marine vessels. However, this has also resulted in increased emissions, necessitating the use of emission control technologies like Selective Catalytic Reduction (SCR) systems and converters to mitigate the environmental impact.
  • Government Incentives – The government's implementation of supportive policies and financial incentives has been a driving force behind the increasing adoption of cleaner technologies in the maritime sector. In particular, shipowners are encouraged to invest in SCR systems, which play a crucial role in reducing emissions and improving air quality. By promoting the use of SCR systems, the government aims to achieve its environmental targets and create a more sustainable future for the marine selective catalytic reduction system market Retrofitting Opportunities- With increasing concern over environmental pollution, retrofitting existing vessels with selective catalytic reduction (SCR) systems is becoming more common to meet emission regulations. This presents a growth opportunity for the retrofitting market as the demand for these systems is expected to increase in the coming years.
  • Fuel Efficiency- Selective Catalytic Reduction (SCR) systems are designed to lower nitrogen oxide emissions from marine engines. The efficiency of SCR in reducing NOx is between 70% and 90%. They work by injecting a urea-based solution into the exhaust stream, converting harmful NOx compounds into harmless nitrogen and water vapor. By reducing emissions, SCR systems enhance fuel economy and engine efficiency, leading to significant cost savings for ship operators.


  • Complexity of Integration- The integration of the SCR system with existing ship engines can be complex, requiring careful engineering and potentially leading to operational challenges during implementation.
  • High upfront costs for installing SCR systems pose a significant barrier for shipowners, especially for older vessels, impacting adoption rates.
  • Limited space aboard vessels may restrict the installation of SCR systems.

Marine Selective Catalytic Reduction System Market: Key Insights

Base Year


Forecast Year



~ 6%

Base Year Market Size (2023)

~ USD 5 Billion

Forecast Year Market Size (2036)

~ USD 10 Billion

Regional Scope

  • North America (U.S., and Canada)
  • Latin America (Mexico, Argentina, Rest of Latin America)
  • Asia-Pacific (Japan, China, India, Indonesia, Malaysia, Australia, Rest of Asia-Pacific)
  • Europe (U.K., Germany, France, Italy, Spain, Russia, NORDIC, Rest of Europe)
  • Middle East and Africa (Israel, GCC North Africa, South Africa, Rest of the Middle East and Africa)
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Marine Selective Catalytic Reduction System Segmentation

Application (Commercial, Offshore, Recreational, Navy)

The commercial segment is anticipated to hold the majority market share, garnering 38% of the market share. This dominance is attributed to the high demand for emission control technologies in the commercial shipping sector, driven by stringent global regulations and the need for fuel efficiency. As commercial vessels constitute a significant portion of the maritime industry, shipowners in this segment prioritize the adoption of selective catalytic reduction systems to comply with emissions standards and achieve sustainable operations, thereby contributing to the system’s pre-existing standards.

End-User (Newbuilds, Retrofits)

The retrofits segment is set to attain the largest market share in the global marine selective catalytic reduction system market. This is due to the increasing emphasis on upgrading existing vessels to comply with stringent emission regulations. As observed by Research Nester analyses, around 477 ships might be modified to run on fuels with little or no carbon emissions, such as ammonia and methanol. Retrofitting offers a cost-effective solution for shipowners to enhance environmental performance without the substantial investment associated with new buildings. As regulatory pressure intensifies and older vessels require compliance upgrades, the retrofit market gains prominence, making it the anticipated leader in market share for marine selective catalytic reduction systems.

Our in-depth analysis of the global marine selective catalytic reduction system market includes the following segments:


  • Commercial
  •  Offshore
  •  Recreational
  •  Navy


  • Newbuilds
  •  Retrofits

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Marine Selective Catalytic Reduction Industry - Regional Synopsis

North American Market Forecast

North America region is expected to hold 42% of the global marine selective catalytic reduction system market share. The region experienced notable growth and transformation in response to stringent environmental regulations. The implementation of emission standards, such as the United States Environmental Protection Agency’s (EPA) Tier 4 and International Maritime Organization’s (IMO) Tier III regulations, drove a surge in demand for SCR systems. As a result of these regulations, ships emit 80% less nitrous oxide and 89% less sulfur oxide than those built in the 1990s. Shipowners across North America sought compliance with these technologies, spurring investments in advanced emission control technologies. When compared to Tier 3 standards, EPA Tier 4 requirements resulted in a 64% decrease in hydrocarbon and nitrous oxide emissions for many engines with power outputs above 600 kW. For instance, Cummins QSK38 engines meet Tier 4 requirements for use in maritime environments. Less than 1.8 g/kW-hr of nitrous oxides and 0.19 g/kW-hr of hydrocarbons are released by these engines. The region witnesses a shift towards cleaner maritime practices, with SCR systems playing a pivotal role in reducing nitrogen oxide (NOx) emissions.  Government incentives, along with a growing emphasis on sustainable shipping practices, further propelled the adoption of SCR systems. The North American marine SCR market evolved as a key player in the global movement towards greener and more environmentally conscious shipping.

European Market Statistics

The European marine selective catalytic reduction system market is estimated to garner significant revenue share. The region has undergone significant evolution, driven by stringent emission regulations and a growing commitment to environmental sustainability. The region, adhering to International Maritime Organization (IMO) Tier III standards, has witnessed a substantial demand for SCR systems. European shipowners, particularly in the commercial sector, prioritize compliance with these regulations, fostering the adoption of advanced emission control technologies. Government incentives and stringent enforcement of environmental norms further accelerate the integration of SCR systems into marine vessels. The market’s growth is also propelled by continuous technological advancements, reflecting the region’s dedication to cutting-edge solutions for reducing nitrogen oxide(NOx) emissions. The European marine SCR system market stands as a key player in the global shift towards cleaner maritime practices, emphasizing both regulatory adherence and environmental stewardship.

Research Nester
Marine Selective Catalytic Reduction System Market size
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Companies Dominating the Marine Selective Catalytic Reduction System Landscape

    • Nett Technologies Inc.
      • Company Overview
      • Business Strategy
      • Key Product Offerings
      • Financial Performance
      • Key Performance Indicators
      • Risk Analysis
      • Recent Development
      • Regional Presence
      • SWOT Analysis
    •  DCL International Inc.
    • Caterpillar.
    • Lindenberg-anlagen GmbH
    • Hug Engineering
    • Wärtsilä Corporation
    • Agriemach Ltd.
    •  Industrial & Marine Silencers Ltd. 
    • H+H Engineering & Service GmbH


In The News

  • Wärtsilä, a technological group, has been certified as compliant with EU Stage V criteria for the marine sector. The Stage V laws, which went into effect in 2020, place more stringent limitations on non-road machinery and engines as well as higher emission standards, particularly for nitrogen oxide (NOx) and particulate matter (PM) emissions. The certification covers the entire system, which includes the exhaust after-treatment system and Wärtsilä 14 engine.
  • According to MAN Energy Solutions, the first SCR catalytic converter for a marine ammonia engine has passed the factory tests and has been delivered to Mitsui E&S in Tokyo, Japan. The converter and future units shall be integrated into the marine ammonia engines of MAN ES.

Author Credits:  Payel Roy, Dhruv Bhatia

  • Report ID: 5782
  • Published Date: Mar 01, 2024
  • Report Format: PDF, PPT

Frequently Asked Questions (FAQ)

Growing global awareness about environmental issues impacted by shipping on air quality, emission regulations, growth in global trade growth, rising technological advancements, and increasing retrofitting opportunities are some of the major drivers for the marine selective catalytic reduction systems market.

The market size of the Marine Selective Catalytic Reduction System is anticipated to attain a CAGR of 6% over the forecast period, i.e., 2024-2036.

The major players in the market are CECO ENVIRONMENTAL, DCL International Inc., Caterpillar., Lindenberg-Anlagen GmbH, Hug Engineering, Wärtsilä Corporation, Agriemach Ltd., Industrial & Marine Silencers Ltd., H+H Engineering & Service GmbH, Hitachi Zosen Corporation, and others.

The commercial segment is anticipated to garner the largest market size by the end of 2036 and display significant growth opportunities.

The market in the North American region is projected to hold the largest market share by the end of 2036 and provide more business opportunities in the future.
Marine Selective Catalytic Reduction System Market Report Scope

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