Current shipping fuel is much dirtier, with a higher sulphur content.

The more viscous crudes are called heavy and those with higher sulphur content are called sour.

Iran is a big producer of sour oil with a higher sulphur content than sweet crudes.

Exxon will then use the hydrogen to reduce the sulphur content of fuel produced at its refinery.

Kashagan oil has high sulphur content and the field lies in shallow waters that freeze in winter.

The plant will produce bunker fuel that complies with new international laws capping sulphur content in shipping fuels.

Home heating oils and other liquid fuels are to be made environmentally healthier by limiting their sulphur content.

Most of the offered Iranian grades were heavy with high- sulphur content, or sour, and a large part were offered into the Mediterranean.

Under new rules from January, ship owners must use fuel with a lower sulphur content or fit vessels with equipment that reduces emissions.

The new regulations limit the sulphur content of fuels burned in ships to 0.5%, from 3.5% currently.

The rules aimed to make ships use fuel with a sulphur content of 0.5%, compared with 3.5% previously.

Platts last changed the sulphur content in its benchmark gasoil grade to 500 ppm from 5,000 ppm in January 2013.

In the shipping industry, new regulations from the International Maritime Organization (IMO) will force shippers to reduce the sulphur content in fuels from 2020.

Cash premiums for gasoil with 10 ppm sulphur content GO10-SIN-DIF fell six cents to 28 cents per barrel to Singapore quotes on Tuesday.

New regulations from the International Maritime Organization will require ships to use fuels with a sulphur content below 0.5% beginning in 2020.

In 2014, when the legal limit had been reduced to 3,000 ppm, BP shipments identified in the data registered sulphur content of 2,500 ppm.