New Delhi: It is considered a dirty fuel and has often been banned from use in the national capital and other cities around the world. But now a Monaco-based firm is offering Indian refiners a patented technology to emulsify fuel oil with water that helps cut down on emissions as well as gives better energy yield. FOWE Eco Solutions (FOWE) says a process known as cavitation using its Cavitech device allows for emulsification of fuel oil, also known as furnace oil, with fresh water on land or onboard a vessel. This process does not require any additives or further processing.