Effects on of blended biodiesel and heavy oil on engine combustion and black carbon emissions of a low-speed two-stroke engine

• Autorzy: Wei Cunfeng , Jiang Guohe , Wu Gang , Zhou Yu , Liu Yuanyuan

Identyfikatory

DOI

10.2478/pomr-2024-0010

• Języki publikacji: EN

Abstrakty

EN

The effects of heavy fuel oil and biodiesel blends on engine combustion and emissions were studied in a marine twostroke diesel engine. The engine was operated under propeller conditions using five different fuels with biodiesel blends of 10% (B10), 30% (B30), 50% (B50), and sulphur contents of 0.467% low sulphur fuel oil (LSFO) and 2.9% high sulphur fuel oil (HSFO). Tests have shown that using a biodiesel blend increases the engine fuel consumption due to its lower calorific value. Heavy fuel oil has a high Polycyclic aromatic hydrocarbons (PAH) content, which leads to higher exhaust temperatures due to severe afterburning in the engine. A comparison of engine soot emissions under different fuel conditions was carried out, and it was found that the oxygen content in biodiesel promoted the oxidation of soot particles during the combustion process, which reduced the soot emissions of biodiesel. Compared to HSFO, B10, B30, B50 and LSFO, the soot emission concentrations were reduced by 50.2%, 56.4%, 61% and 37.4%, respectively. In our experiments, the soot particles in the engine exhaust were sampled with a thermal float probe. Using Raman spectroscopy analysis, it was found that as the biodiesel ratio increased, the degree of carbonisation of the soot particles in the exhaust became less than that in the oxygenation process, resulting in a decrease in the degree of graphitisation.

Słowa kluczowe

EN

low-speed engine; biodiesel; black carbon; raman spectroscopy; degree of graphitisation

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2024
• Tom: nr 1
• Strony: 94--101
• Opis fizyczny: Bibliogr. 21 poz., rys., tab.

Twórcy

autor

Wei Cunfeng

• Merchant Marine College, Shanghai Maritime University, China
• China Shipbuilding Power Engineering Institute, China

• https://orcid.org/0000-0003-1874-0982

autor

Jiang Guohe

• Merchant Marine College, Shanghai Maritime University, China

autor

Wu Gang

• Merchant Marine College, Shanghai Maritime University, China

• https://orcid.org/0000-0002-6307-4993

autor

Zhou Yu

• Merchant Marine College, Shanghai Maritime University, China

• https://orcid.org/0009-0005-2653-7804

autor

Liu Yuanyuan

• Merchant Marine College, Shanghai Maritime University, China

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