Urea for Marine emissions Part II- Diesel Exhaust Fluid Houston Tx

Hi folks, welcome back to this second part of our Marine (DEF) diesel exhaust fluid series where we will expand a bit on where we left off from the first entry or part I.  I promise not to get too technical and we will keep this on the light side as much as possible for a good fast read.

To recap, the introduction blog was simply an overview of the next segment coming up for our diesel exhaust fluid industry.  We have said this over and over here, the intent for our blog is to bring awareness and knowledge to our young industry.  What is knowledge if you cannot share it?

Before we jump in, I’d like to say thank you, to all our subscribers and the folks that comment on this blog with valuable information. This is a community that is only as good as its active readers, bringing information to this public place. We encourage you to continue to be active here and also in our Houston Diesel Exhaust Fluid Linked-In group or any other similar groups hosting great topics and resources.

Marine DEF Houston TexasOk, back on topic now.  The U.S. Environmental Protection Agency’s (EPA) emission control program for marine engines consists of several sets of standards which vary based on the type of engine and size. These EPA standards apply to newly manufactured products produced after the effective date of the standards.   **NOTE: (We will get into the different marine tier standards and dates on the next blog entry).**



The EPA has created three separate categories to define the three distinctive types of marine diesel engines.

Category 1 – This includes engines greater than 37 kW but with a per-cylinder displacement of 5 liters/cylinder or less.  These engines are similar to land-based nonroad diesel engines that are used in applications ranging from skid-steer loaders to large earth moving machines.

Category 2– This includes engines with a specific displacement at or above 5 liters to 30 liters per cylinder. Many of these engines have counterpart locomotive models.  Tugboats and towboats are the principal use of Category 2 marine engines. Similarly, the big fishing vessels, ferries, and many workboats use these larger engines.

*Side Note:* Category 1 and Category 2 marine diesel engines are often derived from or use the same technologies as their land- based counterparts. Consequently, the EPA believes that most of the technology being developed to enable the land-based counterparts to achieve recently finalized emission control programs can be applied to these marine diesel engines

Category 3– This includes large engines, at or above 30 liters per cylinder. These are larger than any mobile source engines addressed by EPA. They are similar in size to land-based power plant generators and are used primarily for propulsion in ocean-going vessels. Because they are currently designed for maximum fuel efficiency and performance without consideration of the impacts on NOx emissions, these engines can have very high NOx emissions.  The way we see it, these are the biggest offenders currently polluting our air. Something to really think about. This includes container ships, tankers, bulk carriers, cruise ships, and Lakers.

Urea Diesel Exhaust Fluid marine HoustonFollowing is a list of companies that manufacture complete diesel engines for the Marine sector. Notice that I said complete because there are also companies that make partial or base engines, but for the sake of this blog entry; we will only focus on those that manufacture complete engines.





Category 1– Caterpillar, Cummins, Deere, and Detroit Diesel. (Domestic)

Category 1– Isuzu, Yanmar (Foreign).

Category 2–  General Motors Electromotive Division, Caterpillar, Fairbanks Morse. (Domestic)

Category 2– Wartsila, MaK, MTU, Deutz, and Yanmar (Foreign).

{FACTOID}: Category 2 engines prices approach or exceeding $1 million for a new engine.

Category 3– There are currently no U.S. manufacturers of Category 3 marine engines for commercial purpose. (Domestic)

Category 3-The following is an EPA list of manufacturers that produce under their own design.  of course, there are others that produce under license.  They are Akasaka, Allen Diesel, Daihatsu, Deutz-MWM, Fincantier Group/GMT Hanshin, MAN-B&W, MaK, Matsui Iron Works, Mitsubishi Heavy Ind. LTD, SEMT-Pielstick, Wartsila-NSD.

Ok next week, we will jump on the Tier standards (Tier 1, Tier 2, Tier 3, and Tier 4). How are you liking the series so far, anything you’d like to add?  Let us know!

Hope you guys are having a great week!!  Write to us at info@transliquidtechnologies.com or call us at 281-377-5845 with any questions or comments.  We always enjoy hearing from you.


Don’t forget to check out our DEF equipment page that keeps evolving.


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