- 1 What is Cat fuel oil fine?
- 2 How do you get cat fines out of fuel?
- 3 Which of the following is catalytic fine present if fuel oil?
- 4 What are cat fines and why might they be present in fuels?
- 5 How many types of fuel samples are there?
- 6 Why is there Sulphur in some marine fuels?
- 7 What is total sediment potential?
- 8 What is oil Ccai?
- 9 What is the minimum flashpoint required by Solas?
- 10 What is the maximum acceptable catalytic fines value in residual fuel as per current standard?
- 11 What are Catfines and what are the bad effects on the engine?
- 12 What happens during catalytic cracking?
- 13 What is cold corrosion in marine engines?
What is Cat fuel oil fine?
Cat fines are catalysts, usually aluminum and silicon compounds, which are used in oil processing for the production of petrol and other fuels. They are used in catalytic cracking, in which large high-boiling hydrocarbon molecules are broken down into many smaller low-boiling molecules.
How do you get cat fines out of fuel?
- If correctly operated, the ship’s fuel oil system is effective at removing significant levels of cat fines.
- Ensure that fuel oil sludge drains are not recycled for diesel engine consumption via the settling tank.
- Cat fine content can be reduced by blending in fuel oil with a lower cat fine content.
Which of the following is catalytic fine present if fuel oil?
Cat fines (catalytic fines) are hard aluminium and silicon oxide particles that are normally present in heavy fuel oil. For refineries relying on catalytic cracking, cat fines are added to the crude oil to enhance low temperature fuel cracking.
What are cat fines and why might they be present in fuels?
As such, HFO is very closely related to tar and must be heated before it can even be pumped on board a ship. Much of the heavy fuel oil (HFO), burnt in the cylinders of large 2-stroke marine diesel engines, is contaminated with hard particles known as catalytic (cat) fines.
How many types of fuel samples are there?
The sixth session of IMO’s Sub-committee on Pollution Prevention & Response (PPR 6), held from 18 to 22 February 2019, agreed on draft amendments to Regulation 2 (Definitions) of MARPOL Annex VI to specify names for three types of samples which may be used by enforcement agencies for verification.
Why is there Sulphur in some marine fuels?
Before the entry into force of the new limit, most ships were using heavy fuel oil. Derived as a residue from crude oil distillation, heavy fuel oil had a much higher sulphur content which, following combustion in the engine, ended up in ships’ emissions.
What is total sediment potential?
The total sediment potential (TSP) which is assessment and indication of the stability and cleanliness of fuel needs to be tested. This test will take one day and when TSP exceeds 0.1pc, the fuel is considered to be unstable.
What is oil Ccai?
The calculated carbon aromaticity index (CCAI) is an index of the ignition quality of residual fuel oil. The running of all internal combustion engines is dependent on the ignition quality of the fuel. For diesel engines it depends on the type of fuel, for distillate fuels the cetane numbers are used.
What is the minimum flashpoint required by Solas?
The International Maritime Organization (IMO) SOLAS regulation requires that fuel used on board ships shall have a flash point of not less than 60C. This is also stated as the minimum flash point limit for marine fuels in ISO 8217, the global fuel standard from the International Organization for Standardization (ISO).
What is the maximum acceptable catalytic fines value in residual fuel as per current standard?
ISO Standard 8217:2012 introduced a maximum permissible 60 ppm level of cat fines, expressed as Aluminium + Silicon, for marine residual fuels, a reduction from the 80 ppm levels in ISO 8217:2005. The level of 60 ppm Al+Si is maintained in the latest published ISO 8217:2017 Fuel Standard.
What are Catfines and what are the bad effects on the engine?
What are Catfines? Catalytic fines are microscopic particulates that remain in marine fuel oil as a result of the crude oil refining process. These can get embedded into engine components and cause abrasive wear, leading to significant insurance claims.
What happens during catalytic cracking?
Steam or catalytic degradation (cracking) refers to the degradation of a plastic by means of steam or a catalyst. In catalytic cracking solid catalysts effectively convert plastics into liquid fuel, giving lighter fractions as compared to thermal cracking.
What is cold corrosion in marine engines?
Cold corrosion is an abnormal corrosion accompanied by a drop in engine temperature, which allows acid to build up on the cylinder liner. Exhaust systems suffer from cold corrosion due to acid formation from combustion process of the engine.