Seed Methyl Ester Research Articles

Experimental studies on performance, combustion, and emission characteristics of diesel engine powered with subabul seed biodiesel blends

ABSTRACT The increasing demand for fuel is due to industrialisation, transportation, and agricultural applications. The present research work exploits the potentiality of subabul seed biodiesel as a viable solution for diesel engine applications. Subabul crude oil was extracted from the subabul seeds through a mechanical pressing process. The transesterification technique was used to produce the subabul seed methyl ester (SSME). Different blends were prepared from subabul biodiesel such as SSME 10, SSME 20 and SSME 30 on a volume basis. It is found that SSME 20 was shown 3.26% higher BTE than SSME 10 at full load. Further, exhaust emissions like CO, HC and smoke were reduced drastically by 23.41%, 10.52% and 11.76% respectively at full load when compared to diesel. However, NOx emissions are 17% higher for the SSME20 than diesel. Further, Combustion characteristics of SSME20 such as HRR (72.68 J/ ˚CA), CP (71.94 bar) and ID (19˚) are closely competing with the diesel fuel.

Methyl ester production from cotton seed oil via catalytic transesterification process; characterization, fatty acids composition, kinetics, and thermodynamics study

In this study, Cotton seed methyl ester (CSME) was produced from extracted Cotton seed oil (CSO) through transesterification process that involves two steps. The CSO obtained from solvent extraction was first esterified using an acid catalyst to obtain the FAME, which was then used in the based catalysed transesterification process that produced the CSME. The physicochemical properties and fatty acids composition of the extracted CSO and produced CSME were evaluated according to the ASTM approved standards. Also, the percentage conversion, activated energy, kinetics, and thermodynamics of the transesterification process were studied. The results also indicate that increase in time and temperature has a positive effect on the percentage conversion of CSO to CSME. The highest percentage conversion (95.48%) was achieved at 65 °C and 150 min. The reaction rate constants obtained for the irreversible pseudo first and second order models were within the range of 4.59 × 10−2 min−1 to 6.77 × 10−2 min−1 and 9.50 × 10−2 dm3mol−1min−1 to 2.27 × 10−1 dm3mol−1min−1, respectively. However, the R2 values indicate that the CSO transesterification reaction was best described by the irreversible pseudo second order model. The activation energy obtained was 18.98 kJ/mol and 43.17 kJ/mol for the pseudo first and second order models, respectively. ∆H, ∆S, and ∆G values for irreversible pseudo first and second orders models, are 13.89 KJ/mol, − 0.158 KJ/mol, and 20.43 – 23.56 KJ/mol and 35.92 KJ/mol, − 0.165 KJ/mol, and 85.21 – 88.31 KJ/mol, respectively. The cetane number, kinematic viscosity, calorific value, flash point, and acid value obtained for the CSME were 53.1, 4.81 mm2/s, 43,690 kJ/kg, 154 ℃, and 0.1 mg KOH/g oil, respectively. The CSME produced has physicochemical properties comparable to those of petroleum-derived diesel.

APPLICATION OF DIESEL-RK SIMULATION TOOL FOR REDUCING NOX EMISSION FROM BIODIESEL BLEND FUELS AT RETARDED INJECTION CONDITION

In renewable energy resources, although biodiesels have occupied the top place as an alternative for compression ignition engines, their high NO<sub>x</sub> discharge causes concern. Retarded fuel injection is a probable solution to reduce NO<sub>x</sub> emission. In the present work, tests are conducted with corn seed methyl ester (CSME) blend at standard and retarded fuel injection timings. Improvement in brake thermal efficiency and reduction in NO<sub>x</sub> emissions are observed due to the retardation of fuel injection timing. DIESEL-RK engine simulation software is used as a potential tool to simulate retardation conditions, and simulation results are compared with experimental values. It is seen that along with the performance and combustion parameters, the simulated NO<sub>x</sub> emission results are in good agreement with experimental values. Hence, the modeling used in the DIESEL-RK software captures the experimental observations well.

Comprehensive Analysis of Compression Ratio, Exhaust Gas Recirculation, and Pilot Fuel Injection in a Diesel Engine Fuelled with Tamarind Biodiesel

The global automotive industry is facing significant challenges, including dwindling fossil fuel reserves, rising crude oil prices, and increasingly strict emission regulations. To address these concerns, this study investigates the impact of the compression ratio (CR) and exhaust gas recirculation (EGR) on the performance and emissions of a common rail direct injection (CRDI) diesel engine fuelled with a 20% blend of tamarind seed methyl ester (TSME 20) biodiesel. The study employed an open-type electronic control unit to implement pilot fuel injection at a rate of 30%, 23° before the top dead centre (TDC), and at a higher pressure of 600 bar. Three CRs (16:1, 18:1, 20:1) and two types of EGR (hot and cold EGR at 10%) were evaluated. Diesel fuel at CR 18 was used as a baseline for comparison. The experimental procedure involved conducting tests with TSME 20 at CR 16, 18, and 20. Subsequently, TSME 20 at CR 20 + Hot EGR 10% and TSME 20 at CR 20 + Cold EGR 10% were examined. The results showed that TSME 20 operated at a higher CR (CR 20) exhibited improved diesel engine performance and significant reductions in harmful exhaust emissions. Additionally, cold EGR at 10% was more effective in reducing CO, CO2, and NOx emissions from TSME 20 than hot EGR. The findings of this study provide valuable insights into optimizing diesel engine operation to achieve a balance between performance enhancement and emission reduction through tamarind seed biodiesel blends and different EGR techniques. The implementation of these strategies holds considerable potential in addressing the automotive industry’s challenges, including ecological considerations and fuel price fluctuations.

Investigation of Emission and Performance Characteristics by using of Jojoba Oil and Tamarind with Additive in Single Cylinder C.I Engine

Abstract: For use as a renewable fuel in diesel engines, the current experimental study investigates the extensive potential of a unique biodiesel in the form of tamarind seed oil. Given its widespread availability at almost no cost, improved sustainability, and environmental friendliness, it is a desirable candidate for widespread use in diesel engines in a nation like India. Through the transesterification process, tamarind seed yields Tamarind Seed Methyl Ester (TSME), and Jojoba Seed Methyl Ester an effective potential fuel. Tamarind Seed Methyl Ester and Jojoba Seed Methyl Ester with diesel fuel are mixed in volumetric proportions to create different biodiesel blends like TJME 10, TJME 20, TJME 30, TJME 40 and TJME 50. Experimental evaluation and comparisons between the physio-chemical characteristics of tamarind and Jojoba seed methyl ester blends, and diesel fuel were conducted.

Optimization of biodiesel/2-propanol/1-hexanol blends based on diesel engine performance using combined mixture-process design (CMPD)

The combined mixture and process design (CMPD)-based optimization tool showed precise prediction and optimized results when there were two or more mixture combinations and one or more process factors investigated. Therefore, in this study, the CMPD method was employed to optimize the mixture components of premixed 20% mango seed methyl ester mixed with 80% diesel (MB20); 2-propanol and 1-hexanol components were optimized with process factor of variable loads. The process factor load was varied from 0 to 100% at 25% intervals, whereas the amount of alcohol was not permitted to exceed 15% by volume in each case. The designed CMPD model optimized the emission parameters such as CO, CO2, O2, HC and NOx to their minimum levels to produce maximum brake thermal efficiency (BTE) from the test engine. The developed optimization model achieved a maximum regression value (R2) of 0.9826 for BTE while CO attained the lowest value (i.e. 0.9254 R2). However, the model optimized BTE, BSFC, CO, CO2, O2, NOx and HC values as 24.31%, 0.452 kg/kw.h, 0.133%, 3.397%, 15.896%, 283.268 ppm and 17.879 ppm, respectively, with the desirability of 0.884. This suggests the optimum fuel combination is 80% MB20, 5% 2-propanol, and 15% 1-hexanol with a 76.086% load.

A Neo Emission Reduction Approach for Minimizing Atmospheric Air Pollutants Using Ternary Fuel with Pentanol and Seaweed Anti-Oxidant in Multi-Cylinder Diesel Engine

<p>This research examines the scope for reducing the air pollution caused by the transportation sector through the infusion of biofuel and antioxidants ensuring the partial replacement of conventional fuel. A four-stroke, direct-injection, multi-cylinder and constant-speed diesel engine was employed for the experimental analysis. The ternary fuel blend with a composition of 70% diesel fuel, 20% rubber seed oil and 10% of pentanol and sea weed extract in different ratios were blended to form B20, B20A1, B20A2 and B20A3. The experimental results showed smoke and carbon monoxide reduced by 4.71%, unburned hydrocarbons by 2.2 %. The NOx emission which was slightly higher compared to diesel but not higher than B20 for the blend B20A2 by 5%. The brake thermal efficiency was increased by 3.71% when compared to diesel fuel. Consequently, the B20A2 (5% seaweed and 5% pentanol additive with 70% diesel and 20% of rubber seed methyl ester oil) was found to be an environmentally biodegradable gasoline with the best emission properties. The study findings are quite promising for future which seeks towards zero emission with optimum quantity of biofuel to replace diesel.</p>

Analysis of the Emissions and Performance of a Diesel Engine Using Pumpkin Seed Oil Methyl Ester with Different Injection Pressures

Biodiesel fuel is a potential alternative energy source for diesel engines due to its physiochemical characteristics relatively similar to those of traditional diesel fuel. In this study, the performance, emission, and combustion features of a mono cylinder DI diesel engine are assessed using 20% Pumpkin seed methyl ester (PSOME20) and considering varying injection pressures (200, 220, 240, and 260 bar). The considered Pumpkin seed oil is converted into pumpkin biodiesel by transesterification and then used as fuel. The findings demonstrate that the Brake Thermal Efficiency (BTE) of PSOME20 can be raised by 1.68%, and the carbon monoxide (CO), hydrocarbon (HC), and smoke emanations can be lowered, while oxides of nitrogen (NOx) emissions are increased at an injection pressure (IP) of 240 bar compared to the standard IP of 200 bar. The cylinder pressure and the Heat Release Rate (HRR) become higher at 240 bar, whereas the ignition delay is shortened with respect to PSOME20 at a normal IP of 200 bar.

Performance, emission characteristics of CI engines fueled with Annona seed biodiesel blends and 1-pentanol as an additive

Fossil fuel is one of the predominant sources for automobiles are facing depletion across the world. This depletion put up a greater demand for the need of alternative fuel sources for automobiles. As a solution for this issue, many researchers formulated and synthesized biodiesel from the oil extract of plant seeds and bio waste materials. The present work involves the synthesis and extraction of methyl ester from the oils of Annona seed and blended with diesel along with 1-Pentanol as an additive. Three-blend mixture of biodiesel is prepared with methyl ester of 10%, 20%, and 30% of Annona seed oil with 10 ml of 1-Pentanol in it. The formulated biodiesel is evaluated for its performance using the Kirloskar Diesel engine under different loading conditions. The evaluation is carried out in terms of brake thermal efficiency, brake specific fuel consumption, and other parameters along with emission characteristic analysis of CO, NOx, and CO2, From the observed results, the biodiesel blend with 30% of Annona seed methyl ester showed better performance. However, the emission analysis over different gases showed biodiesel with 10% of Annona seed methyl ester showed reduced emission.

Optimization of engine parameters using NSGA II for the comprehensive reduction of emissions from VCR engine fuelled with ROME biodiesel.

Diesel engines are most widely used as power plant for many applications, like automotive, agricultural purposes, portable machines and remote location power generation, because of their higher torque, power output, energy content per unit mass and cost of fuel. Because of the higher compression ratios, the diesel engines are able to produce greater cylinder pressures resulting in higher temperatures and thermal efficiency. On other hand, the diesel engines produce COx, NOx, Soot and sulphur emissions which are harmful and these pollute the environment leading to acid rain, global warming and variety of human diseases. Also, the present emission regulations are framed such a way to ensure the environmental sustainability in addition to the economic and social importance. These constraints make the researchers find an alternate fuel for replacing the diesel fuel on the existing diesel engines for the reduction of environmental pollutions. Biodiesel is found to be a very good alternative fuel obtained from natural resources and having good energy with least possible emissions. Rubber seed methyl ester (ROME) is one kind of the biofuel can be used in the existing diesel without any engine modifications. The ROME is produced using trans esterification process and the biodiesel blends are prepared in the sequence of B20, B40, B60 and B80. The ROME is tested on the Variable Compression Ratio (VCR) engine to test the emission characteristic in line with the performance characteristics. To reduce the emissions, the prediction models are developed forCO andNOx using the Response Surface Methodology (RSM). The models are verified through the ANOVA and p-test for their adequacy to create the hypothesis of the experimentation. The NSGA II evolutionary multi-objective optimization is used to optimise the engine parameters to minimise the pollutions from the ROME fuelled engine. The optimized parameters are tested and verified experimentally for the least possible emissions.

Influence of iron oxide nanoparticles with different injection pressures using lotus seed methyl ester biodiesel: an experimental investigation

ABSTRACT The present research work explores the utilization of lotus seed methyl ester in a Common rail direct injection diesel engine. It evaluates the performance, combustion aspects, emission features at different injection pressures 210 bar to 240 bar intervals of 10 bar, along with 120 ppm of iron oxide nanoparticle. For this investigation, the B20 blend used as fuel contains 80% diesel and 20% biodiesel (Lotus seed Methyl Ester). The iron oxide nanoparticles were mixed with the fuel using a mechanical homogenizer and ultrasonication. The present work results revealed a reduction in FC by 12.5%, decreased CO by 50%, a decrease in HC by 16.88%, and the reduction of smoke density by 16.51% compared to that of baseline fuel maximum load (5.2 kW). The combined effect of 240 bar injection pressure and 120 ppm of iron oxide nanoparticle gives the best result. Abbreviation: MS; Motor Sprit (Petrol): HSD; High Speed Diesel: AFT; Transportation fuels: ICRA; Investment Information and Credit Rating Agency of India Limited: IONP; Iron Oxide Nano Particles: SFC; Specific Fuel Consumption: LSME; Lotus Seed Methyl Ester: MT; Metric Ton: BTE; Brake Thermal Efficiency: HC; Hydrocarbon: CO; Carbon monoxide: NOx; Nitrogen Oxides: HRR; Rate of Heat Release: BP; Brake Power

Impact of injection timings and exhaust gas recirculation rates on the characteristics of diesel engine operated with neat tamarind biodiesel

ABSTRACT The extensive usage of petroleum products in the power sector, industries, and transportation may lead to the depletion of fossil resources. Also, the most important human challenges of the 21st century are global warming and climate changes due to increased pollution levels. Nowadays, the need for new energy sources is one of the foremost problems of all countries in the world. The current experimental work is primarily focusing on the exploration of neat tamarind seed methyl ester (TSME) as a sustainable energy source for diesel engines. All the physicochemical properties were determined experimentally with concern to ASTM standards and compared with diesel fuel. Initially, tests were performed on a diesel engine with diesel and neat tamarind biodiesel in standard operating conditions 23º CA bTDC. Later, the injection timing was varied like 19º CA bTDC and 27º CA bTDC for the neat tamarind biofuel. A test result found with TSME biofuel that enhancement in brake thermal efficiency (BTE) by 4.07% was achieved with the retardation of engine injection timing when compared to standard injection timing. Also, it was found that drastic reduction of exhaust emissions by 9.7%of CO, 15.8% of HC and 6% of SO have resulted in the retarded injection timing of TSME when compared to standard conditions of TSME at full load. However, the oxides of nitrogen emissions were increased. To control the oxides of nitrogen emissions, exhaust gas recirculation (EGR) at two levels such as 10% and 20% were used when the engine was operated at retarded injection timing (IT) with TSME. It was found that TSME with 10% EGR inferred a drastic reduction of nitrogen oxide emissions by 30% and 37.7% over diesel and TSME, respectively, at full load.

Effect of split fuel injection strategies on the diverse characteristics of CRDI diesel engine operated with tamarind biodiesel

ABSTRACT The demand for petroleum fuels has been rapidly increasing owing to the wide use of automobiles and other agricultural engines which prefer diesel as a major fossil fuel. This research work investigates the effect of change in the fuel injection strategies on CRDI engine under various loads with tamarind seed methyl ester (TSME) 20% biodiesel blend. Initially, the diesel fuel is injected at 600 bar with 30% pilot injection (P.I) and 100% main injection (M.I). Later, TSME20 is injected at the same pressure with the two injection strategies mentioned. This study discloses that the BTE has boosted by 4.79% with 30% pilot injection than 100% main injection for the tested biodiesel. Further, TSME20 biodiesel at 30% pilot injection has shown significant reduction of hydrocarbons by 12.16%, carbon monoxide by 32.14% and smoke emissions by 19.71% when compared with 100% diesel main injection at peak load conditions. However, the pilot injection for the tested fuels has exposed slight enhancement in NOX emissions, which may be reduced by exhaust gas recirculation (EGR). Hence, the use of 30% pilot injection of TSME20 biodiesel is recommended for diesel engines as an alternative fuel which has improved performance along with reduced emissions.

Experimental evaluation of diesel engine powered with waste mango seed biodiesel at different injection timings and EGR rates

Stringent emission norms and renewable energy policies of governments are creating necessity to adopt renewable energy sources for diesel engine applications. Changing the operating parameters of the engine is one of feasible technique to enhance the engine performance. The present experimental work is mainly focuses on the influence of changing injection timing along with different EGR rates for the research diesel engine fuelled with 20% mango seed methyl ester (MSME 20). Initially, the fuel injection timing varied at three levels such as retarded injection timing (19° bTDC), standard injection timing (23° bTDC) and advanced injection timing (25° bTDC) for the diesel engine powered with 20% mango seed biodiesel blend and compared with diesel. Based on experimentation, it was found that MSME20 blend at advanced injection timing resulted in higher BTE by 4.54% and also drastic reduction in engine exhaust emissions like carbon monoxide, hydrocarbon and smoke emissions by 32.43%, 29.26% and 15.38% when compared with MSME 20 (23° bTDC) blend at full load conditions. However, there was considerable increment in NOX emissions. In order to mitigate the NOX emissions, the engine is further operated with different EGR rates (5% and 10%) at advanced fuel injection timing. Addition of 5% EGR concentration to advanced injection timing (25° bTDC) was significantly reduced NOX emissions by 43.38% without much compromise in engine performance.

Combined influence of compression ratio and EGR on diverse characteristics of a research diesel engine fueled with waste mango seed biodiesel blend

ABSTRACT Currently world is encountering crisis such as diminution of fossil fuel resources and global warming due to engine emissions. Changing the operating parameters of the engine is one of feasible technique to enhance the engine performance. The present experimental work is mainly focuses on the influence of changing compression ratio along with different EGR rates for the research diesel engine fueled with 20% mango seed methyl ester (MSME 20).Transesterification process was used to reduce the viscosity of mango seed methyl ester. As per ASTM standards, the fuel properties of MSME and MSME20 were evaluated and compared with diesel. Initially, the compression ratio was varied at three levels such as 18:1, 20:1, and 22:1 for the diesel engine powered with 20% mango seed biodiesel blend and compared with diesel. Based on experimentation, it was found that MSME20 blend with compression ratio of 22:1 was shown enhanced brake thermal efficiency by 7.4% and also reduction in engine emissions such as carbon monoxide, hydrocarbon and smoke opacity by 33.3%, 40%, and 7.1% were found at full load respectively when compared to MSME20 with compression ratio of 18:1. However, there was considerable increment in NOX emissions. In order to mitigate the NOX emissions, the engine is further operated with different EGR rates (5% and 10%) at compression ratio of 22:1. The test results evident that addition of 5% of EGR to the engine running at compression ratio 22:1 reduced the NOX emission levels by 40.5% over standard conditions without much penalty in engine performance.

The effect of three new biodiesel feedstocks (second-generation) on the performance and emissions of diesel engines

ABSTRACT The present study experimentally considers the performance and emissions of three new species of second-generation biofuels (lilium ledebourii, iris meda and the viola odorata seed methyl ester) in a diesel engine. These three biofuels can grow in harsh condition and require low cost of maintenance. All biodiesels are added to diesel fuel by the volume of 20% (B20), 50% (B50), 80% (B80), and 100% (B100). The torque of B20 for all biodiesel samples is much closer to the diesel fuels and the highest torque is achieved by iris meda biodiesel compared to others. The B100 is shown to have the lowest engine power in all biodiesel blends. Also, the viola odorata biodiesel has lower engine power compared to other biodiesel samples. The B20 has the lowest brake-specific fuel consumption (BSFC) in all biodiesel blends. The viola odorata biodiesel shows a higher BSFC compared to other biodiesels. In addition, the highest reduction of biodiesel is shown by B20, while it is still higher than neat biodiesels. At B100, the highest exhaust gas temperature is displayed during the use of viola odorata biodiesel compared to other biodiesel samples. The viola odorata biodiesel emits NOx of around 29.5% compared to diesel fuels, which is higher than other biodiesels. The increase of biodiesels in diesel fuel decreases the amount of SO2 expressively. The reduction of smoke opacity (B100) for the iris meda, lilium ledebourii, and viola odorata seed biodiesels is about 69%, 72%, and 74%, respectively. The neat viola odorata biodiesel is shown to have the lowest smoke opacity.

Effect of Nozzle Hole Number on Diesel Engine Using Diesel and Biodiesel Blends

In this work the experiment was carried out to investigate the performance, combustion and emissions by changing the number of nozzle holes of the injector such as 3 hole, 4 hole and 5 hole by maintaining the hole diameter as 0.25mm. The experiments are executed on Kirloskar 4-stroke computerized single cylinder air cooled and electrical dynamometer coupled DI diesel engine with diesel, Rubber seed methyl ester and B20 Blend as fuels at 1500 rpm, with the injection timing of 23.4°BTDC with an injection pressure of 240 bar maintained constant throughout the experiment. It is found that 4 hole nozzle gives higher brake thermal efficiency, lower specific fuel consumption, CO, HC, for Diesel, Biodiesel and B20 Blend compared with other two nozzle holes. However the NOX got increased which is more for all the tested fuels by varying a number of nozzle hole diameter.

OPTIMIZATION OF FATTY ACID GENERATION USING PARAMETRIC ANALYSIS

The objective of this study is to optimize the different parameters to carry out analysis of fatty acids. A kinetic was observed for first order enzymatic hydrolysis of flax seed methyl ester was carried out by using Rhizomucor michei. In this study the analysis of hydrolysis was carried out by varying the temperature (30-40oC) and enzyme load (2-5%). The optimal condition were found to temperature 50oC, 6h reaction time, buffer to flax seed methyl ester ratio 1.5:1(v/w) and 4% enzyme load to achieve a maximum hydrolysis conversion of 97.56%. The effect of temperature on the reaction rate constant and equilibrium constant has been determined using Arrhenius equation. The heat of reaction was found 14.516 KJ/mol. Taguchi's design of experiment L16 and L9 orthogonal array was performed to optimize hydrolysis reaction conditions. Rate of reaction, effect of temperature, enzyme modifier, pH and oil to buffer ratio were considered as a primary influencing parameters which effects the percentage of hydrolysis and fatty acid formed. From the analysis of variance, the influencing parameters on production of fatty acid were reaction time and enzyme modifier. The predicted conversion was found in good rectification with experimental values having R2=0.9945 and R2=0.983. Maximum fatty acid formed was 98.76% from methyl ester and 98.92% from oil.

Performance of a low heat rejection engine fuelled with tobacco seed oil and its methyl ester (TSOME)

In this investigation, the engine components were coated with metal matrix composite materials. Thus, a compression ignition (CI) was converted into low heat rejection (LHR) engine. Initially diesel fuel (DF), tobacco seed oil (TSO) and tobacco seed oil methyl ester (TSOME) were tested on an uncoated engine in order to make the basis for comparison. The results obtained show reduced brake thermal efficiency, increased brake specific energy consumption and an increase in emissions for TSO when compared with DF operation. However, with TSOME marginal improvement in BTE, BSEC and slight reduction in emissions were observed when compared with TSO. Then TSO and TSOME were tested in the coated engine. Results obtained were compared with results of DF, TSO and TSOME in non LHR engine operation. These results showed that the LHR operation improved the performance of the engine with the reduction in emissions for the fuels used when compared with non LHR operation. Abbreviations: BP: Brake power; BTE: Brake thermal efficiency; BSFC: Brake specific fuel consumption; BSEC: Brake specific energy Consumption; CO: Carbon monoxide emission; EGT: Exhaust gas temperature; HC: Hydrocarbon; NOx: Oxides of nitrogen; NHRR: Net Heat release rate; RPR: Rate of pressure rise; DF: Diesel fuel; TSO: Tobacco seed oil; TSOME: Tobacco seed methyl ester; LHR: Low heat rejection engine; MMC: Metal matrix composite; CA: Crank angle; CI Compression ignition

An experimental assessment of prospective oxygenated additives on the diverse characteristics of diesel engine powered with waste tamarind biodiesel

Rapid depletion of petroleum resources, surge in fuel prices and stringent emission norms play a key role on economic development of a country like India in terms of energy efficiency, which attracts the researchers to search for novel alternative fuel for diesel. The work reported here focuses on the effect of various oxygenated additives such as diethyl ether, dimethyl ether and dimethyl carbonate to 20% tamarind seed methyl ester (TSME 20) biodiesel blend of different concentrations (6% and 12%) on volume basis to examine engine characteristics. The test results revealed that 12% diethyl ether added TSME20 is shown considerable enhancement in brake thermal efficiency, which is 4.22% higher over tamarind biodiesel blend. Similarly, TSME20 DEE 12 has shown significant reductions in harmful engine tailpipe emissions such as carbon monoxide, hydrocarbon, oxides of nitrogen and smoke opacity which are noted to be about 10.68%, 33.33%, 10.33% and 27.72% respectively when compared to diesel fuel at full load. Further, the DIESEL-RK theoretical simulation results are compared with the experimental values, conducted at the same operating conditions and it is inferred that 12% diethyl ether addition to TSME 20 has shown promising engine characteristics both experimentally and theoretically.