Performance and emission properties of preheated and blended fennel vegetable oil in a coated diesel engine

• Published in: Fuel (Guildford) 2019-10, Vol.254, p.115677, Article 115677
• Main Authors: Hazar, Hanbey, Sevinc, Huseyin, Sap, Serhat
• Format: Article
• Language: English
• Subjects: Atomizing; Biofuels; Carbon monoxide; Coating; Coatings; Combustion chambers; Crude oil; Cylinders; Diesel; Diesel engines; Diesel fuels; Emissions; Engine performance; Exhaust emission; Exhaust gases; Foeniculum; Gas temperature; Heating; Insulated diesel engine; Nitrogen oxides; Oils & fats; Oxides; Photochemicals; Physical properties; Preheated fennel seed oil; Smoke; Test engines; Test procedures; Thermodynamic efficiency; Vaporization; Vegetable oils; Viscosity
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/j.fuel.2019.115677

•Pre-heating process (at 100 °C) reduced the viscosity of the fennel oil and also provided a more favorable fuel flow and the coating process had a positive effect on diesel emissions.•The coating process was provided thermal insulation.•The blending a fennel oil and diesel fuel is an eco-friendly fuel.•The efficiency of using the fennel oil, one of the vegetable oils, in a diesel engine by applying pre-heating was investigated.•The thermal barrier layer (Cr3C2) is successfully obtained on the components a diesel engine. The use of crude fennel seed oil in a diesel engine, whose combustion chamber was thermally insulated, with diesel fuel at specific rates was investigated in the present study. A single-cylinder air cooled diesel engine was used as the test engine. Plasma spray method (coated with Cr3C2 in a thickness of 300 µm) was used as the coating method. Since the atomisation and vaporisation of fennel oil are highly affected by the physical properties of the fuel, a preheating process of 100 °C was applied. Crude fennel oil mixed with diesel fuel at 30% and 50% by volume. It was shown that a preheating process of 100 °C provided a proper fuel flow and reduced the viscosity of the funnel oil and additionally, the coating process decreased carbon monoxide (CO), smoke, and hydrocarbon (HC) emissions but increased nitrogen oxides (NOx), thermal efficiency, and exhaust gas temperature (EGT).