Influence of Biodiesel Fuel on the Combustion and Emission Formation in a Direct Injection (DI) Diesel Engine

Abstract

This paper studies the influence of biodiesel fuel on the combustion and emission formation of two different direct-injected diesel engines, both employing different combustion processes. The research was focused on determining the influence of the specific combustion process on measurement results to ascertain if a generalization of the results is possible or whether they have to be interpreted as specific for specific engines. Standard D2 diesel fuel and commercial 100% biodiesel fuel were used. Tests were executed using both fuels under the same conditions, and exhaust emissions and engine performance were measured and compared. In-cylinder pressure was also acquired, and the rate of heat release curves were computed by means of a zero-dimensional, one-zone combustion model. Some macroparameters of the combustion process were obtained from the heat-release-rate curves. The results obtained for both engines showed that findings regarding the influence of biodiesel fuel on the combustion process and emission formation could not be generalized and had to be interpreted as specific for the particular engine.

Pyrolytic Conversion of Olive Mill Wastewater Sludge to Biofuels Using Red Mud as Catalyst

“…The raw OMWS oxygen content was reduced from 24.1 mass% to 5 mass% after pyrolysis at 450°C, which is equivalent to 79.2% deoxygenation of the OMWS by the red mud. The HHV of the red mud catalyzed pyrolysis oil ranged from 39.5-41.3 MJ/kg which is lower than that of D2-petrodiesel (42 MJ/kg) but higher than that of biodiesel (37.3 MJ/kg) [40]. A typical biodiesel fuel contains 10-12 mass% oxygen compared to the 5 mass% obtained for the OMWS red mud pyrolysis oil.…”

Impact of Fischer–Tropsch and biodiesel fuels on trade-offs between pollutant emissions and combustion noise in diesel engines

“…The sulphur and aromatics content of biodiesel fuels are negligible while their oxygen (O 2 ) concentration is substantially high (in the order of 10% on weight basis) [2]. These characteristics allow significant reductions of sulphur dioxide (SO 2 ), soot, carbon monoxide (CO) and unburned hydrocarbons (UHC) [3,4]. However, due to their influence on the ignition delay (ID), the production of nitrogen oxides (NO x ) during combustion is usually increased [5].…”

Effects of open combustion chamber geometries on the performance of pongamia biodiesel in a DI diesel engine

“…Researchers Hribernik and Kegl [36] have reported that the combustion and emission formation, particularly the increase of NO x emissions by application of biodiesel varies significantly with different combustion systems and different combustible mixture formation strategies. Pasupathy Venkateswaran and Nagarajan [37] have carried out simulation studies to investigate the effect of piston bowl geometry on both engine performance and combustion efficiency in a direct injection, turbocharged diesel engine for heavy-duty applications using STAR-CD.…”