Effects of Biodiesel from Palm Kernel Oil on the Engine Performance, Exhaust Emissions, and Combustion Characteristics of a Direct Injection Diesel Engine

Lin, Bo-Wen; Huang, Jyun-Han; Huang, Dao-Yi

doi:10.1021/ef800338j

Cited by 18 publications

(5 citation statements)

References 27 publications

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“…When the engine speed was increased above 1300 rpm, the RSO biodiesel NO x tended to reduce until 2000 rpm was reached. It is noted that higher NO x emissions at lowengine speeds have been found in previous studies where test were carried out at constant load and various engine speed conditions (Lin and Lin, 2006;Altiparmak et al, 2007;Lin et al, 2008;Lin and Li, 2009). This is probably also due to the start of 162 Combustion efficiency and performance of RSO biodiesel as alternative fuel in a single cylinder CI engine combustion being too far advanced as a consequence of being derived from its physical properties (viscosity, density, compressibility, sound velocity) as discussed before (Carraretto et al, 2004;Lapuerta et al, 2008a;Lapuerta et al, 2008b).…”

Section: Results and Discusionmentioning

confidence: 82%

Combustion Efficiency and Performance of RSO Biodiesel as Alternative Fuel in a Single Cylinder CI Engine

Thaiyasuit

Pianthong

Milton

2012

Energy Exploration & Exploitation

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In this study, the combustion efficiency and performance of an engine using biodiesel produced from rubber seed oil (RSO) was compared with petroleum diesel. The tests were performed at full load over a range of engine speeds in a single cylinder, direct injection diesel engine. The experimental results show that the RSO biodiesel resulted in better combustion than with the petroleum diesel at low to medium engine speeds (1300-1900 rpm). In this range, the combustion efficiency and the brake fuel conversion efficiency of the RSO biodiesel were found to be 1.03% and 7.33% higher respectively than those of petroleum diesel. In addition, a slightly lower brake specific CO 2 emission level was achieved, this being because of the higher H/C ratio of the RSO biodiesel. A major improvement in the brake specific CO emission of the RSO biodiesel was found, these being 55% lower than those of the petroleum diesel. However, the brake specific NO x emission was 39.5% higher. Both the brake torque and brake power of the RSO biodiesel were 4.91% lower than those of the petroleum diesel while an increase of around 6.84% fuel consumption was required at the same power output all these being due to its lower heating value. Above 1900 rpm in these tests, the combustion efficiency trend reversed with the RSO biodiesel giving a lower value than the petroleum diesel. In this higher speed range, the performance (i.e. brake fuel conversion efficiency, brake power, and brake torque) fell below that of the petroleum diesel with the brake specific fuel consumptions and the brake specific CO emissions being higher.

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Section: Results and Discusionmentioning

confidence: 82%

Combustion Efficiency and Performance of RSO Biodiesel as Alternative Fuel in a Single Cylinder CI Engine

Thaiyasuit

Pianthong

Milton

2012

Energy Exploration & Exploitation

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“…A study conducted with high oleic acid soybean biodiesel led to lower NO x emissions relative to regular soybean biodiesel indicating that fewer polyunsaturated fatty acids contributed to the improvement . Additional studies have found that oils containing less polyunsaturated fatty acids, such as palm or coconut oil, have lower NO x emissions than soybean biodiesel. ,,, Using neat methyl esters, Knothe et al determined that unsaturated fatty acids as well as those with longer chain length (>C16) can increase NO x emissions . The low prevalence of polyunsaturated fatty acids and the predominance of shorter chain length fatty acids present in C. gracilis oil (Table ) likely contribute to its low NO x emissions.…”

Section: Discussionmentioning

confidence: 99%

Biodiesel from Microalgae, Yeast, and Bacteria: Engine Performance and Exhaust Emissions

et al. 2012

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Biodiesels (fatty acid methyl esters) derived from oleaginous microbes (microalgae, yeast, and bacteria) are being actively pursued as potential renewable substitutes for petroleum diesel. Here, we report the engine performance characteristics of biodiesel produced from a microalgae (Chaetoceros gracilis), a yeast (Cryptococcus curvatus), and a bacteria (Rhodococcus opacus) in a two-cylinder diesel engine outfitted with an eddy current brake dynamometer, comparing the fuel performance to petroleum diesel (#2) and commercial biodiesel from soybeans. Key physical and chemical properties, including heating value, viscosity, density, and cetane index, for each of the microbial-derived biofuels were found to compare favorably to those of soybean biodiesel. Likewise, the horsepower, torque, and brake specific fuel consumption across a range of engine speeds also compared favorably to values determined for soybean biodiesel. Analysis of exhaust emissions (hydrocarbon, CO, CO2, O2, and NO x ) revealed that all biofuels produced significantly less CO and hydrocarbon than petroleum diesel. Surprisingly, microalgae biodiesel was found to have the lowest NO x output, even lower than petroleum diesel. The results are discussed in the context of the fatty acid composition of the fuels and the technical viability of microbial biofuels as replacements for petroleum diesel.

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“…The use of vegetable oil as engine fuel is limited by its high viscosity and low volatility, which cause poor cold-start performance, misfire, and ignition delay . Transesterified vegetable oil blended up to 20% with diesel can be easily used in the existing diesel engine without any engine modification. , Thus, the present study adopted a 20% biodiesel–diesel blend.…”

Section: Introductionmentioning

confidence: 99%

Effects of Palm–Coconut Biodiesel Blends on the Performance and Emission of a Single-Cylinder Diesel Engine

et al. 2015

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This study aims to investigate the effects of palm or coconut biodiesel blend and their combination on the performance and emissions of a single-cylinder diesel engine. A 20% v/v blend of palm biodiesel (PB20) or coconut biodiesel (CB20) and varying percentage mixtures of these two feedstocks (PB15CB5, PB10CB10, and PB5CB15) were used in the experiments. Biodiesel was produced using one-step transesterification. Physicochemical analysis showed that both palm and coconut biodiesel met the specifications of ASTM D6751. A 10 kW, horizontal, one-cylinder, four-stroke direct injection diesel engine was used to carry out tests under full load conditions at varying speeds from 1400 to 2400 rpm with an interval of 200 rpm. Burning of CB20 reduced break power by 1.72% and increased brake-specific fuel consumption (BSFC) and NOx emission by 4.07% and 4.49%, respectively. Conversely, burning of PB20 negligibly reduced brake power and increased NOx emission by only 1.79%. Meanwhile, combined palm–coconut biodiesel at a constant final blend reduced NOx emission by 0.54% to 1.85% and slightly improved brake power and BSFC. Thus, the advantages of the high cetane number of coconut and the high ignition quality of palm biodiesel were aggregated in the combined blends.

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Effects of Biodiesel from Palm Kernel Oil on the Engine Performance, Exhaust Emissions, and Combustion Characteristics of a Direct Injection Diesel Engine

Cited by 18 publications

References 27 publications

Combustion Efficiency and Performance of RSO Biodiesel as Alternative Fuel in a Single Cylinder CI Engine

Combustion Efficiency and Performance of RSO Biodiesel as Alternative Fuel in a Single Cylinder CI Engine

Biodiesel from Microalgae, Yeast, and Bacteria: Engine Performance and Exhaust Emissions

Effects of Palm–Coconut Biodiesel Blends on the Performance and Emission of a Single-Cylinder Diesel Engine

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