Evaluation of Combustion Stability and Exhaust Emissions of a Stationary Compression Ignition Engine Powered by Diesel/n-Butanol and RME Biodiesel/n-Butanol Blends

Abstract

In recent years, the interest in renewable fuels has increased mainly due to regulations regulating the permissible limits of toxic components of exhaust gases emitted by reciprocating engines. This paper presents the results of a comparison of the effects of fueling a compression-ignition piston engine with a mixture of diesel fuel and n-butanol, as well as RME (Rapeseed Oil Methyl Esters) biodiesel and n-butanol. The tests were carried out for a constant load and a wide energetic share of fuels in the mixture. The main focus was on the assessment of combustion stability, the uniqueness of the combustion stages, and the assessment of the fuel type influence on the CA50 angle. The tests show that RME offers the possibility of efficient combustion with n-butanol with up to 80% energy share. The share of n-butanol has a positive effect on the engine’s efficiency and very effectively reduces soot emissions. Without the influence on COVIMEP, the share of n-butanol up to 40% in the mixture with diesel fuel and up to 80% in the mixture with RME was recorded. Combustion of RME with n-butanol was more stable. The share of n-butanol in the mixture with diesel fuel caused an increase in NOx emissions, and co-combustion with RME caused a decrease in emissions.

Biodiesel Blends for Eco-Friendly CRDI-VCR Engines: Enhancing Exhaust Emissions and Engine Performance to Minimize Pollutant Emissions

“…Available studies in the literature (Hoang et al 2023;Al-Ansari et al 2023: Jin andWei 2013;Winangun et al 2023;Luo et al 2023;Ali and Maki 2023;Kumar and Paul 2023;Tutak et al 2023;Tongroon et al 2023) They also indicated that the emission of CO2 and NOx rise, while the emission of UBHC, CO and smoke opacity decreased at the CRs 14:1, 16:1 and 18:1 (El_Kassaby and Nemit_allah 2018). Channappagoudra et al (2018), investigated the effect dairy scum oil biodiesel at different compression ratio ( CR 16, CR17 and CR18) in a stationary engine.…”

“…Biodiesel has many advantages over diesel fuel, such as integral lubricant, less toxic, biodegradability, negligible sulfur content and inferior CO2 emissions (Luo et al 2023;Ali and Maki 2023). Utilization of biodiesel is a way to diminish reliance on fossil fuel and the downside environmental impacts of fossil fuel combustion, while at the same time improving rural employment (Kumar and Paul 2023;Tutak et al 2023). The Indian government encouraged the role that developing biofuel, particularly from non-edible oil feedstocks on marginal or degraded soils, might play in establishing a thriving new rural sector (Sharma et al 2022a;2022b).…”

“…burn in PCP, increases the Pcyl of diesel fuel closer to KOME blends at full load (Figure 6e-f). It is due to the higher Tcyl at full load (25 Nm), which improved the air/fuel mixing rate and made more fuel get burned in the PCP (Tutak et al 2023). The heat release rate (HRR) is used to measure the combustion efficiency by the rate of fuel burn in the PCP (Al-Ansari et al 2023).…”

“…NOx emissions in biodiesel are the product of the incylinder temperature of combustion and fuel-bound radicals (Tutak et al 2023). At higher temperatures, N2 reacts with O2 and gives 2NO (Tutak et al 2023).…”

Investigating the Combined Impact of Water–Diesel Emulsion and Al2O3 Nanoparticles on the Performance and the Emissions from a Diesel Engine via the Design of Experiment

“…When hydrocarbon fuels burn incompletely inside the combustion chamber, a toxic compound known as carbon monoxide is created [75]. As the air-fuel ratio declines below the stoichiometric value, the CO emissions rise.…”