Smoke Opacity Research Articles

Influence of TiO2 nano-additive and compression ratio on the performance parameters in a VCR diesel engine using microalgae biodiesel

The current study emphasizes effect of TiO2 nanoparticle dissemination in microalgae biodiesel blend to enhance the characteristics of fuel MAB20 and boost VCR CI engine features. The TiO2 nanoparticle was mixed with microalgae biodiesel at three distinct levels, i.e. (25ppm, 50ppm, and 75ppm) with surfactant (Span80) by ultrasonication. The compression ratio (17, 19, and 21) used at varying braking load. Current research confirms the use of 75 ppm TiO2 nanoparticle in MAB 20 at CR 21 has reduced the unburned hydrocarbon emission by 22.36% and 41.58%, smoke opacity emission by 35.66% and 65.67%, CO emission by 18.60% and 30.69%, NOx emission by 14.58 and 5.62% as compared to MAB20 and Diesel respectively. The TiO2 nanoparticle concentration increases from 25 ppm to 75 ppm. It shows lowered HC emission by 14.49%, CO emission by 13.28%, NOx emission by 9.05%, and smoke emission by 28.42%. In contrast, Brake thermal efficiency has increased by 5.06%, specific fuel consumption reduces to 10.19%, and Exhaust gas temperature has declined by 9.58% as compared to MAB20 and with an increase in nanoparticle concentration from 25ppm to 75ppm BTE has reduced by 0.95%, BSFC has increased by 1.66%, and EGT has lowered by 5.86%. Also, CPmax was increased by 11.75%, and NHRR was increased by 10.84% compared to MAB20. Increase in nanoparticle concentration increases CPmax and NHRR by 7.43% and 6.76%.

Experimental investigation and gray relational optimization of engine parameters to improve the output characteristics of an ammonia biodiesel powered dual fuel combustion engine

An innovative approach to this research is to evaluate the effects of different concentrations of biodiesel with premixed ammonia energy in a dual-fuel combustion engine and determine the best operating conditions for optimal engine responses. Experimental results of a 40% ammonia energy premixing fraction with direct injection of a biodiesel blend of 30% (40%AEPF + B30) at 80% load improved brake thermal efficiency (BTE) by 8.42% while reducing brake specific energy consumption (BSEC) by 13.28%. It also reduces the hydrocarbon (HC) emission by 16.8%, the carbon monoxide (CO) emission by 15.06%, and the smoke opacity by 26.8%. As opposed to this, carbon dioxide (CO2) and nitrogen oxide (NOx) emissions are elevated by 21.5% and 16.54%, respectively, relative to the 40% ammonia energy premixing fraction with direct injection of diesel (40%AEPF + Diesel). Thereafter, the ANOVA technique is also utilized to analyze the impact of operational parameters, and the findings show that the responses are statistically significant. Additionally, the results are utilized in a grey relational analysis (GRA) based optimization process to determine the appropriate operational variables. According to optimization results, 40%AEPF + B30 at 80% load provides the most efficiency and fuel economy. It is capable of being used as an alternate fuel instead of conventional diesel.

Waste Cooking Oil Biodiesel and Their Nanobiodiesel Blends Infused with Reduced Graphene Oxide (RGO) Nanoparticles for Diesel Engine Applications

This work focusses on the potential application of waste cooking oil (WCO) as alternative to diesel as it is abundantly, locally available. The oil is subsequently converted into its biodiesel called waste cooking biodiesel (WCOBD). GCMS studies of the waste cooking oil and its biodiesel is carried out to determine the fatty acid composition. Further WCOBD is blended with diesel to produce its WCOBD B20 blend. The physio-chemical properties of the WCO, WCOBD, WCOBD B20 and their nano-biodiesel blends were determined and were compared with diesel. These properties of WCOBD B20 are in good agreement with diesel. This B20 blend can successfully provide 20% substitute to fossil diesel and save foreign exchange besides providing energy security to India. The fuel properties of the WCOBD B20 blends are further modified by adding carbon derived nanoparticles of reduced graphene oxide (RGO) to prepare nano-biodiesel blends. The percentage of RGO nanoparticles were varied from 20% to 100 % by volume insteps of 20% using suitable SDS surfactants. The stability of these nano-biodiesel blends is determined by using zeta potential method. The stability of decreased with increase in the nano-particle dosage in base biodiesel blends. Accordingly, the blends with dosage beyond 80% showed lower stability in terms of lower zeta potential values. The nano-biodiesel blends showed improvement in calorific value and self-ignition temperature compared to the B20 biodiesel blend. Among the Nano-biodiesel blends considered WCOME B20 RGO80 showed comparatively higher BTE (11.67%), reduced emissions of smoke opacity (14.63%), HC (21.42%), CO (16.67%), ID (10%), CD (16.67%) and increased NOx (2.5%), and PP (15.38%) respectively when compared to the WCOBD B20 blend.

Experimental investigation and optimization of dual fuel combustion using diesel/gasoline and Bio-oil extracted from Co-thermal liquefaction of paint/biomass wastes: An approach towards waste to energy

A higher-grade transport fuel from both non-biodegradable paint waste and biomass plant Prosopis Juliflora is obtained in the most economical and eco-friendly way by hydrothermal liquefaction process. The yielded bio-oil is experimented on a diesel engine in dual fuel combustion (DFC) strategy and compared with the conventional diesel combustion (CDC). In DFC, the secondary fuels (gasoline, bio-oil, and premixed gasoline-bio-oil blends) are port injected at different premixed ratios (10, 20 and 30%), while the primary diesel fuel is directly injected into the cylinder. DFC of diesel - bio-oil (DB) exhibited higher brake thermal efficiency than premixed gasoline at all power outputs and performed closer to neat diesel. Lower smoke emission is observed in DB than neat diesel and the DFC of diesel-gasoline (DG) at all conditions. At 30% premixed ratio, the smoke opacity of DFC of diesel and premixed bio-oil - gasoline (DGB) is 65.7% and 68% respectively compared to that of CDC (76.4%). At all loads, average NOx emission of DGB (20% gasoline) is abated by 23.2, 7.8 and 12.9% than CDC and 20% of DB and DG respectively but almost equal to neat diesel at full load. The experimental data are used to train an artificial network (ANN) and the trained ANN is used to generate sufficient data for optimizing the fuel concentration using TOPSIS algorithm to realize an overall improved performance and emissions. The optimized combustion modes arrived from this study are: CDC for 25% load, DFC of DGB (D90G2B8) for 50% load and DFC of DB for 75% (D89B11) and 100% (D86B14) loads.

Performance and emissions assessment under full load operation of an unmodified diesel engine running on biodiesel-based waste cooking oil synthesized using JPW solid catalyst

The current study builds upon the prior research (Mulkan et al., 2023) [1], which successfully created an innovative solid catalyst from discarded jackfruit peel waste (JPW) to produce biodiesel from waste cooking oil (WCO). Expanding on this initial research, our study's primary objective is to assess the performance and emissions attributes of a diesel engine when utilizing blends of WCO biodiesel and conventional diesel fuel under full load conditions, covering engine speeds from 1200 to 2400 rpm. The results show that as engine speed increases, brake-specific fuel consumption (BSFC) decreases by an average of 16.67%–22.69%, while brake thermal efficiency (BTE) increases by 16.67%. Engine torque initially decreases and drops significantly at higher speeds, while brake power (BP) proportionally rises. Notably, substantial reductions in CO emissions (ranging from 6.11% to 48.63%) were observed at all engine speeds compared to pure diesel. However, CO2 and NO emissions generally increased, although some fuel samples demonstrated reductions. Hydrocarbon emissions decreased with higher engine speeds, while smoke opacity increased, with slight reductions observed for specific fuel samples at 1800–2400 rpm. In conclusion, blending WCO biodiesel synthesized using the JPW catalyst with pure diesel results in improved engine performance and reduced exhaust emissions.

Analysis and optimisation of emissions and fuel economy of biodiesel fuelled CI engine using Taguchi technique

The objectives of the present work are to examine the combined effect of engine operating and injection parameters and to optimise these parameters for better fuel economy, performance, and reduced emissions. The fuels used were diesel and biodiesel blends of Jatropha and Karanja biodiesel. The results indicate that diesel gives higher thermal efficiency at low loads, however, the 20% jatropha blend was slightly more efficient, at high loads. It was observed that the BSFC increases when the EGR is varied from 0% to 20%. Even though the smoke opacity increases with increased EGR, advanced injection at 28o BTDC decreases smoke. Increased EGR also reduced NOx emissions by up to 11%. Blending also has a significant impact on the output parameters. Taguchi analysis was applied to optimise the performance and emission characteristics of the diesel engine and set of input values were obtained for the optimum performance under different conditions.

Enhancing biodiesel stability and performance: synthesis and extraction of macauba biodiesel for sustainable engine applications

The demand for sustainable fuels has driven research on biodiesel blends’ combustion characteristics and emissions. The study evaluates the performance of macauba and soybean biodiesel blends by analyzing torque, power, and fuel consumption indicators. The effects of leaf extract additives on engine performance are also assessed. Comparing macauba and soybean blends show similar load, brake power, and engine speed trends on response variables. However, slight variations in coefficients and significance levels indicate unique combustion and emission profiles for each blend. Understanding these distinctions is crucial for optimizing engine performance and emission control strategies. Parameters analyzed include brake-specific fuel consumption (BSFC), brake thermal efficiency (BTE), exhaust gas temperature (EGT), carbon monoxide (CO) emissions, hydrocarbon (HC) emissions, oxides of nitrogen (NOx) emissions, smoke opacity, cylinder pressure, heat release rate, and ignition delay. Blends 80% Soy Methyl and 20% Macauba Methyl Biodiesel (BSM20) demonstrates 5–10% superior fuel efficiency, 8–12% higher energy conversion capability, 3–5% lower exhaust temperatures, 10–15% reduced emissions, and 5–8% enhanced efficiency versus other blends and Diesel. It also shows 10–20% lower hydrocarbon and CO emissions, 15–25% reduced NOx, 20–30% lower particulate matter, and more efficient energy release during combustion. Optimizing heat release rate and ignition delay is crucial; BSM20 shows a 10–15% shorter ignition delay. Understanding blend distinctions is key for optimizing performance and emissions. BSM20 blend demonstrates superior fuel efficiency, energy conversion capability, lower exhaust gas temperatures, reduced emissions, and enhanced engine efficiency compared to other blends and Diesel. It also shows lower hydrocarbon, CO, and NOx emissions, reduced particulate matter emissions, and more efficient energy release during combustion. Optimizing heat release rate and ignition delay is crucial for cleaner combustion and improved engine performance.

Experimental investigation of fuel injection timing effects on a CRDI diesel engine running on hydrogen-enriched waste plastic oil

In response to fossil fuel concerns and the imperative of effective plastic waste management, this study investigates the impact of hydrogen-plastic oil (WPO) blends on a CRDI diesel engine. Six combinations (WPO10, WPO20, WPO30, WPO10 + H2, WPO20 + H2, WPO30 + H2) are examined across varying loads and fuel injection timings. Notably, WPO10 + H₂ (H2 energy share i.e., 8 lpm) exhibits a 15.1 % increase in brake thermal efficiency, an 11.2 % fuel consumption reduction, improved peak cylinder pressure (66 bar), and maximum heat release rate (40.16 J/°CA) compared to diesel. It also shows reduced emissions of CO, HC, CO2, and smoke opacity—34.8 %, 15.1 %, 10.7 %, and 28.5 %, respectively, relative to diesel. Elevated nitrogen oxide (NOx) emissions are observed across all blends. This study underscores the environmental benefits of blending waste plastic oil with diesel, promoting recycling, reducing reliance on traditional diesel, lowering greenhouse gas emissions, and supporting sustainability. Advanced fuel injection timing at higher loads slightly mitigates NOx emissions, while increasing the blend proportion leads to prolonged ignition delays, reduced thermal efficiency, and heightened emissions.

Experimental investigation of 4‐cylinder compression–ignition engine parameters fueled by newly formulated hydrous ethanol–diesel‐emulsified fuel infused with nano‐sized γ‐Al2O3 particles

AbstractThe present study tested newly formulated hydrous ethanol–diesel‐emulsified fuel infused with nano‐sized γ‐Al2O3 particles on a turbocharged CRDI 4‐cylinder stationary diesel engine. W5H5, W5H10, and W10H5 test fuels were inducted into engine cylinders at a fixed engine speed of 2000 rpm. These test fuels significantly improved their physicochemical properties, with an 8.80% increase in gross calorific value and a 6.52% growth in cetane index. W5H10 exhibited a 16.01% increment in brake thermal efficiency and a 22.22% decrement in brake‐specific fuel consumption. Also, this fuel reported an 8.64% higher in‐cylinder pressure and a 40.71% higher heat release rate. W5H10 test fuel noted a 50% dip in carbon monoxide emissions and an 84.56% lower smoke opacity than diesel. W5H5 fuel reported 33.33% lower unburnt hydrocarbons than diesel at full load. W10H5 fuel observed an 88.46% drop in nitrogen oxide emissions compared with diesel at 10% engine load. The author found W5H10 the most suitable fuel for diesel engines with no modification costs.

Improving the combustion and emission performance of a diesel engine with TiO2 nanoparticle blended Mahua biodiesel at different injection pressures

Alternative fuels have sparked a lot of interest as oil deposits have decreased and environmental concerns have grown. Biodiesel is an alternative fuel that is being researched as a possible replacement for fossil fuels. A 4-stroke diesel engine's performance, combustion, and emission parameters were investigated in this work by changing the fuel injection pressure (180, 200, 220 and 240 bar) were studied using biodiesel obtained from Mahua oil at 20 % v/v blended with neat diesel (20% Mahua Biodiesel + 80 % Diesel) B20, then TiO2 nanoparticles added four concentrations are 25 ppm, 50 ppm, 75 ppm and 100 ppm. Performance characteristics such as BTE and BSFC of fuel samples were improved with TiO2 nanoparticles at higher injection pressure. Combustion characteristics were improved at lower injection pressure, B20T50 indicated near In-Cylinder pressure to diesel at 180 bar and B20T50 showed 5.3 % higher HRR compared to B20. TiO2 nanoparticles in the fuel blend gave positive results by decreasing emissions, CO and HC emissions were lower at small injection pressure. CO2 emissions were increased by 2.5 % and 4.4 % with B20T100 compared to diesel and B20. Maximum reduction of smoke opacity and NOx were observed at 240 bar FIP.

Machine learning predictions on the output parameters of CRDI engines fueled with ternary blend

This study aims to employ a machine learning algorithm (MLA) to predict CRDI engine emissions and performance using alternative feedstock. This study started with a diesel-SCOME- Methyl Acetate ternary mix. The engine was tested with fuel injection time (FIT) of 23?, 21?, and 19? bTDC with exhaust gas recirculation (EGR) levels of 10%, 15%, and 20% at estimated power productivity. Retard injection time and increasing EGR rates reduced in-cylinder peak pressure. Operating conditions with the maximum BTE were 21? bTDC and 10% EGR. Adjusting injection time and EGR reduced nitrogen oxide relative to the baseline. Smoke opacity was 1% lower at 21? bTDC and 10% exhaust gas recirculation than in conventional diesel operation. Retard injection time and exhaust gas recirculation increased HC and CO emissions. However, MLAs predict CI engine operation and discharge properties. The long short-term memory (LSTM) Model predicts engine output characteristics with a squared correlation (R2) of 0.92 to 0.961. At the same time, mean relative error (MRE) values ranged from 1.74 to 4.68%. These results show that the LSTM models provide superior predictive capabilities in this investigation, particularly when considering numerous variables to analyse engine responses.

Synergistic effects of nano-enhanced waste transformer oil and hydrogen premixing on CI engine performance and emissions

Waste materials possess untapped potential when harnessed effectively. One such resource is waste transformer oil, derived from electrical transformers, which can be converted into a valuable fuel source for compression-ignition (CI) engines using pyrolysis techniques. In this study, we explored the utilization of a 50 % blend of waste transformer oil with diesel, augmented with Titanium dioxide nanoparticles (referred to as “nano fuel of waste transformer oil”), in an unmodified CI engine. To further enhance the performance of this nano fuel, we introduced hydrogen (at flow rates of 2.5 LPM, 5.0 LPM, and 7.5 LPM) into the inlet section during the suction phase, promoting premixing within the cylinder. Hydrogen premixing significantly improved combustion dynamics. Notably, when 7.5 LPM of hydrogen was introduced alongside waste transformer oil-derived nano fuel, a remarkable 37.30 % increase in brake thermal efficiency was achieved. Moreover, this configuration exhibited a 15.33 % reduction in brake-specific fuel consumption (BSFC), a 27.09 % decrease in carbon monoxide (CO) emissions, a 37.50 % decrease in unburned hydrocarbon (UHC) emissions, and a 28.53 % reduction in smoke opacity compared to traditional diesel operation. These results highlight the potential for enhanced CI engine performance and reduced emissions through the strategic combination of waste transformer oil-based nano-fuel and hydrogen premixing. Consequently, we recommend further exploration of hydrogen premixing in conjunction with nano-enhanced waste transformer oil for superior CI engine performance.

Production of waste soybean oil biodiesel with various catalysts, and the catalyst role on the CI engine behaviors

The soybean oil wastes are disposed of after being used multiple times (maximum utilization) in the various food processing industries. Disposal of such waste are harmful to the environment and human. Hence, this investigation aims to use such wastes are used for producing alternate fuels for diesel engines. The biodiesel produced from the soybean waste cooking oil by transesterification process with different hybrid catalysts such as the membrane of Poly-acrylonitrile nanofibrous (MPANF), Alkyl-celite (AC), Iron oxide (IO-II) and Ni-doped ZnO (NDZ). The transesterification process variables like flow velocities varied from 0.3 to 1.5 mL/min and the reaction time varied from 15 to 75 h. The influence of such variables was investigated. The best two yields of waste soybean oil (BDWSBO) with the use of IO-II and AC catalysts respectively at 1.5 mL/min of flow rate at a 75-h reaction time, were considered for preparing further blends with diesel of 25 vol% and 50 vol% (Total 4 fuel varieties other than plain diesel). The test results revealed that a blend of 25 % diesel fuel with 75 % IO-II -used BDWSBO has 30.05 % BTE, which is nearer to diesel fuel (30.81 %). This blend has 17.96 % lesser smoke opacity than diesel fuel. Therefore, this 25 % diesel fuel with 75 % IO-II -used BDWSBO blend is recommended for higher production biodiesel and application in the IC engine as an alternate fuel without any modifications.

Influence of introducing clove antioxidant into blends of diesel and biodiesel fuels on engine performance

The utilization of biodiesel as fuel in diesel engines leads to increased NO emissions, which is a significant pollutant that needs to be promptly mitigated. This can be achieved by incorporating natural antioxidants as an additive to suppress the NO emissions. The main focus of the current experimental investigation is to analyze the engine characteristics of Mahua biodiesel by incorporating clove as a natural antioxidant in diesel fuel. The tests encompassed a wide set of engine functioning conditions including varying loads, to ensure comprehensive analysis. The results showed a significant improvement in brake thermal efficiency, with a value of 25.7% for the blend of Mahua biodiesel at 20% concentration with diesel, compared to 24.6% for the blend of Mahua biodiesel at 20% concentration with diesel fuel containing 1000 ppm of clove extract, and 23.9% for the blend of Mahua biodiesel at 20% concentration with diesel fuel containing 2000 ppm of clove extract. The intriguing observation witnessed is that when Mahua biodiesel was blended at a 20% concentration with diesel fuel containing 2000 ppm of clove extract, it resulted in a significant percentage reduction in NO emissions by 7.7%, HC emissions by 8.8%, CO emissions by 28%, and smoke opacity by 9.9% compared to the blend of Mahua biodiesel at 20% concentration with diesel.

Effect of compression ratio and injection timing on the performance of microalgae‐based biodiesel blend

AbstractThe manuscript addressed experimental work related to microalgae‐based biodiesel blend B20, that is, 20% algae biodiesel and 80% diesel, as an alternative fuel as a possible source to power diesel engines. The physiochemical characteristics of this B20 blend were almost in line with diesel fuel as per American Society for Testing and Material standards. Coupled experimentation related to variations in compression ratio (CR) 17, 19, and 21 and fuel injection timing (IT) of 21°, 23°, and 25° before top dead center (bTDC) with load variations noted on diesel engines. We observed that, at full load, CR21 and 23° bTDC fuel IT, the brake thermal efficiency parameters rose significantly, whereas brake‐specific fuel consumption, and combusted flue gas temperatures also plummeted. The CO, HC, and smoke opacity emission for the B20 blend at CR21 and FIT23 has decreased by 30.52%, 33.33%, and 32.96%, respectively. At full load conditions, NOx emission for B20 biodiesel at CR21 was increased compared with the standard setting and compared with diesel it was increased by 6.46%.

Energy, Exergy, and Emission Analysis of Biofuels in Compression Ignition Engine with Camphor Oil as Premixing Fuel

This article aims to study the impact of camphor oil premixing with intake air on compression ignition (CI) engine characteristics powered with jatropha oil and cottonseed oil. The experiment is conducted on the direct injection compression engine attached to the premixing setup. The investigation reveals that premixing of camphor oil with cottonseed oil and jatropha oil escalates the thermal brake efficiency to 35.02% and 33.62% and brings down the brake‐specific energy consumption to 10.27 and 10.70 kJ kWh−1. At all loading conditions, the premixing of camphor oil and the rise of camphor oil in premixing proportions increase the volumetric efficiency and cut the exhaust gas temperature. 20% premixing of camphor oil with cottonseed oil and jatropha oil drops the smoke opacity emissions by 22.23% and 11.86% and NO emission by 23.27% and 14.59%, respectively, at full load conditions. Further, it shows a 27.60% and 21.14% hike in CO emissions and a 31.34% and 31.87% hike in HC emissions at full load conditions. The in‐cylinder pressure, heat release rate, and mean gas temperature increase with increasing the energy share of camphor oil in premixing. Overall, the premixing of camphor oil shows better CI engine attributes except HC and CO emissions.

Assessment of hydrogen and diethyl ether enrichment on CI engine operating with binary blend of jatropha and camphor oil using response surface methodology

This paper aims to study the compression ignition dual fuel engine's characteristics operating with blends of jatropha and camphor oil along with hydrogen enrichment. The fuel blend was prepared by mixing 30 % Jatropha oil with 70 % Camphor oil on volume basics. Hydrogen gas was inducted in the air intake manifold at 4 and 8 LPM. Diethyl ether was added at 10 and 20 % to the binary blend of Jatropha oil and camphor oil at volume percentage to improve engine characteristics at 8 lpm. Matrix 1 was prepared using a central composite design for the input of load (50 %–100 %) and hydrogen induction up to 8 lpm. Matrix 2 was prepared for 8 lpm hydrogen induction by varying the diethyl ether concentration up to 20 %. The output response was analyzed using response surface methodology and a statistical model was found significant for the confidence level of 1 %. The experimental results show that the addition of 8 LPM of hydrogen in the air intake manifold has increased the brake thermal efficiency with maximum efficiency increment up to 33.7 % at 100 % load condition. Similarly, with hydrogen induction the maximum value for in-cylinder peak pressure (ICPmax), heat release rate (HRR), exergy efficiency (EE), and sustainability index (SI) are 76.5 Bar, 53.9 J/⸰CA, 43 % and 1.73 respectively. The reduction in emission of CO, smoke, HC and CO2 was noted with the penalty of NO emissions. Further, DEE addition by 20 % along with 8 LPM Hydrogen induction reduces the brake thermal efficiency significantly and a similar trend was noted with emissions such as CO, HC and NO and the smoke opacity. However, when 10 % DEE was added with 8 LPM of hydrogen there was an increase in BTE showing a maximum value of 34.2 %.

Experimental Investigation of Single-Cylinder Engine Performance Using Biodiesel Made from Waste Swine Oil

The global push towards sustainable energy solutions has intensified research into alternative fuels, such as biodiesel. This study investigates the performance and emission characteristics of biodiesel derived from waste swine oil in comparison to traditional diesel fuel. Using an engine running at 75% load across a range of speeds (1200 rpm to 1800 rpm), various metrics such as Brake-Specific Fuel Consumption (BSFC), Brake Thermal Efficiency (BTE), and emissions including Carbon Monoxide (CO), Hydrocarbon (HC), Carbon Dioxide (CO2), Nitrogen Oxide (NOx), and smoke opacity were measured. The biodiesel demonstrated a higher BSFC (270 g/kWh) compared to diesel (245 g/kWh) but showed reduced Brake Thermal Efficiency (28.5% vs. 29.8%) compared to diesel. In terms of emissions, biodiesel blends recorded lower levels of CO, HC, and smoke opacity, but elevated levels of CO2 and NOx. The results indicate that while biodiesel from waste swine oil presents some environmental benefits, such as reduced CO, HC, and smoke emissions, challenges remain in terms of higher NOx emissions and less efficient fuel consumption.

Salvia farinacea seed oil, a potential biomass for synthesis of biodiesel: A critical analysis of its fuel properties.

The non-renewable energy sources such as coal, petrol decreasing day by day and their price also increasing. In this fast depleting era of fossil fuels biodiesel produced from nonedible seed oils plays an important role. In the present work the biodiesel is produced from nonedible seed oil Salvia farinacea. In this work from Salvia farinacea seeds oil is extracted and fatty acid components are analysed by GC-FID. Physicochemical properties of the oil are determined by AOAC standard methods. The oil is transesterified in presence of KOH catalyst. Fuel parameters like iodine number, cetane number, heating values, kinematic viscosity, flash point, cold flow properties are determined and are compared with already existing biodiesels and petrodiesel. The emission components like CO, CO­­2, NOx, HC and Smoke opacity are analysed using four stroke one cylinder engine. This work reveals that Salvia farinacea seed oil is a potential renewable feedstock for the production of biodiesel.

Geleneksel Dizel ve IBE Yakıtlı Bir Common-Rail Dizel Motorun Yanma ve Emisyonları Üzerinde Karışım Oranı ve Püskürtme Zamanının Etkisi

In present study, combustion characteristics of mixtures of isopropanol-butanol-ethanol (IBE) with petroleum-based diesel fuel at the rates of 10%, 20% and 30% volumetrically in a single-cylinder CRDI engine were examined under different loads which correspond to 20%, 40% and 60% of maximum torque. The effect of the injection timings from 15 °CA to 23 °CA (bTDC) with 2 °CA increments was also studied at 60% load and constant speed of 2400 rpm. Experimental results showed that IBE blends with diesel fuel delayed the combustion at low load while increasing load reduced this delay when compared with diesel fuel. An increase in cylinder gas pressure up to 5.7% and rate of heat release up to 42% in using IBE was observed. Regarding emissions, despite no significant change in CO emission was observed with the load and IBE ratio; UHCs increased up to 35% at low load conditions; however, they reduced at 60% load. While smoke opacity reduced up to 64% with IBE30 when compared with diesel fuel, NOx emissions increased about 10%. The decrease in injection advance caused a decrease in pressure and heat release rate, while NOx emissions increased gradually up to 54% with increasing injection advance.