Any - Shell fuels - data sheets - craig-pd130

If anyone's at all interested in the exact specifications of the fuels sold on Shell forecourts in the UK, the company's own material data sheets are accessible from this link:

www.epc.shell.com/default.asp

Just select the UK as the country, then click through to fuel products and you can find the Shell's own data sheets and specs for its regular FuelSave and V-Power petrol & diesel products.

It's interesting to note that Shell itself states that its ordinary FuelSave diesel has a higher typical cetane number (53 - 55) than its own V-Power superdiesel (typical cetane number of 51 - 53).

FuelSave unleaded is typically 95 - 95.2 octane, and V-Power is typically over 99 octane.

Any - Shell fuels - data sheets - Big John

It's interesting to note that Shell itself states that its ordinary FuelSave diesel has a higher typical cetane number (53 - 55) than its own V-Power superdiesel (typical cetane number of 51 - 53).

Isn't this because with V-Power the diesel is effectively diluted with the V-Power additives

Any - Shell fuels - data sheets - Wackyracer

The cetane rating is achieved by using 2-ethylhexyl nitrate I believe, or at least it seems to be what all the additive companies use to increase cetane.

Any - Shell fuels - data sheets - Andrew-T

The cetane rating is achieved by using 2-ethylhexyl nitrate I believe, or at least it seems to be what all the additive companies use to increase cetane.

That stuff must add a bit to the NO2 everyone is screaming about .... :-(

Any - Shell fuels - data sheets - RT

The cetane rating is achieved by using 2-ethylhexyl nitrate I believe, or at least it seems to be what all the additive companies use to increase cetane.

That stuff must add a bit to the NO2 everyone is screaming about .... :-(

Just like all the air that gets sucked into the engine - 78% Nitrogen, 21% Oxygen, 1% other gases.

Edited by RT on 30/07/2017 at 10:49

Any - Shell fuels - data sheets - Stanb Sevento

Any one wanting to read about diesel fuel this is one of the best documents I have found. Its a bit geeky but the section on addatives is very good. If you cant sleep this will sort you out.

www.chevron.com/-/media/chevron/operations/documen...f

Its worth noting that modern oxidation catalyst- DPF units use NOx to give a degree of passive regeneration. The NOx combines with the Carbon giving CO and CO2 and NO, further down the system in the SRC the CO reacts with NO to give CO2 and N. This is why on the motorway the soot can reduce or at least increase slowly even though the temperatures are too low to burn the soot. A bit of NOx can actually help.

As far as I know Shell add a quantity of liquified narural gas to V-Powe this may well reduce the cetane number but they say it improves the combustion process

Edited by Stanb Sevento on 30/07/2017 at 12:22

Any - Shell fuels - data sheets - Andrew-T

That stuff must add a bit to the NO2 everyone is screaming about .... :-(

Just like all the air that gets sucked into the engine - 78% Nitrogen, 21% Oxygen, 1% other gases. >>

Of course. But in EHN the nitrogen is already in the oxidised (nitrate) form. It's quite hard to oxidise raw nitrogen. What goes on in the exhaust system of a modern diesel, which among other things is presumably designed to convert carbon residues to CO2 ?

Nitrogen prefers (in energy terms) to exist as nitrogen, which is partly why ammonium nitrate makes a good explosive: main products water and nitrogen.

Edited by Andrew-T on 31/07/2017 at 12:38

Any - Shell fuels - data sheets - Wackyracer

The cetane rating is achieved by using 2-ethylhexyl nitrate I believe, or at least it seems to be what all the additive companies use to increase cetane.

That stuff must add a bit to the NO2 everyone is screaming about .... :-(

Probably not too much as according to one additive manufacturer, using at 1000:1 it increases the cetane rating by 4 numbers and of course that additive is not 100% 2EHN as it contains other chemicals such as varnish removers and lubricity agents.

Without knowing the natural cetane rating of the diesel at the refinery prior to having the additive package its not possible to guess how much 2EHN is added.

If we worked on the assumption that diesel base stock has zero cetane rating and they use 2EHN, then I suppose we could guess it would be no more than 13cc per litre.

 

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