Performance and Emission Studies of a Diesel Engine Fuelled with Different Jatropha Biodiesel Blends

The ever increasing number of automobiles has led to increasing in demand for petroleum fuels. The environment degradation and depletion of fossil fuels are another reason to search the replacement of this fossil fuel. Biodiesel can become an attractive choice because it is renewable, non-toxic, environmental friendly. The objective of the present research work is to investigate the use of Jatropha biodiesel (JB) and fuel derived from pyrolysis of waste tires (WTDL) in diesel engine as a replacement of diesel in certain amount. The JB and WTDL were blended with diesel (5, 10, 15 and 20% by volume) and experiments have been conducted in a single cylinder, four stroke, air cooled diesel engine. The brake thermal efficiency of the blend was found to be lower than diesel. However, hydrocarbon emission and smoke opacity were found to be lower with blend (up to 10%) than diesel o The nitric oxide emissions of blend were higher than diesel. In view of comparable engine performance and reduction in most of the engine emissions, it can be concluded that blend which contained 10% JB, 10% WTDL and 80% diesel can be be used as fuel for diesel engine operation without any engine modification.


Introduction
Clean fuel for transportation and power generation is the worldwide requirement for environment and sustainable development. The transportation sector mainly depends on petroleum fuels resulting to economic and environmental consequences. Global @ IJTSRD | Available Online @ www.ijtsrd.com | Volume -2 | Issue -1 | Nov-Dec 2017 Abhishek Sharma Asst. Amity University,Gwalior The ever increasing number of automobiles has led to increasing in demand for petroleum fuels. The tion and depletion of fossil fuels are another reason to search the replacement of this fossil fuel. Biodiesel can become an attractive choice toxic, environmental friendly. The objective of the present research work is stigate the use of Jatropha biodiesel (JB) and fuel derived from pyrolysis of waste tires (WTDL) in diesel engine as a replacement of diesel in certain The JB and WTDL were blended with diesel (5, 10, 15 and 20% by volume) and experiments have conducted in a single cylinder, four stroke, air cooled diesel engine. The brake thermal efficiency of the blend was found to be lower than diesel. However, hydrocarbon emission and smoke opacity were found to be lower with blend (up to 10%) than diesel operation. The nitric oxide emissions of blend were higher than diesel. In view of comparable engine performance and reduction in most of the engine emissions, it can be concluded that blend which contained 10% JB, 10% WTDL and 80% diesel can be be used as a potential fuel for diesel engine operation without any engine Biodiesel; Diesel Engine; Waste to Energy; Clean fuel for transportation and power generation is the worldwide requirement for environment protection and sustainable development. The transportation sector mainly depends on petroleum fuels resulting to economic and environmental consequences. Global climate changes due to carbon dioxide (CO which motivates a vigorous policy debate o source of energy for the light duty vehicle transportation sector. With the increase in use and the depletion of fossil fuels will create a big problem in front of whole world in the coming decade. The numerous biomass based feed stocks can b generate alternate energy which may act as extender or a complete replacement of fossil fuels. This will help very significantly in agricultural, industrial and transport sector in the energy crisis situation. The importance of diesel fuel in the neglected because of its ever increasing use. In fact, agricultural and transport sectors mainly depend on diesel. The different alternative fuel options which may replace diesel partially or 100 % are mainly biogas, producer gas, ethanol, methanol vegetable oils, and biodiesel etc.
Finally released to atmosphere throu the biomass is burnt to produce desired temperature of 400-700°C at the surface of combustion chamber. When steady temperatures are attained waste tire made to fall through the outside surface of combustion chamber with the help of pusher mechanism. Waste tire coming in contact with hot surface melts on outside surface of combustion chamber, cracking occurs and vapors escape to the top of pyrolytic cha The present study is focused to analysis the effect of fuel derived by pyrolysis of waste tire (WTDL) blended with JB and diesel in four different percentages as test fuels, on the performance and emission characteristics of a direct injection (DI) diesel engine. The WTDL JB at low percentages (5-20% at regular intervals of 5%

Dec 2017
Page: 1200 International Open Access Journal

Performance and Emission Studies of a Diesel Engine Fuelled with Different Jatropha Biodiesel Blends
Abhishek Sharma Asst. Professor Amity University,Gwalior climate changes due to carbon dioxide (CO 2 ) emission which motivates a vigorous policy debate on alternative source of energy for the light duty vehicle transportation sector. With the increase in use and the depletion of fossil fuels will create a big problem in front of whole world in the coming decade. The numerous biomass based feed stocks can be used to generate alternate energy which may act as extender or a complete replacement of fossil fuels. This will help very significantly in agricultural, industrial and transport sector in the energy crisis situation. The importance of diesel fuel in these sectors cannot be neglected because of its ever increasing use. In fact, agricultural and transport sectors mainly depend on diesel. The different alternative fuel options which may replace diesel partially or 100 % are mainly biogas, nol, methanol vegetable oils, and Finally released to atmosphere through chimney Firstly the biomass is burnt to produce desired temperature of 700°C at the surface of combustion chamber. When steady temperatures are attained waste tire is made to fall through the outside surface of combustion chamber with the help of pusher mechanism. Waste tire coming in contact with hot surface melts on outside surface of combustion chamber, cracking occurs and vapors escape to the top of pyrolytic chamber.
The present study is focused to analysis the effect of fuel derived by pyrolysis of waste tire (WTDL) blended and diesel in four different percentages as test fuels, on the performance and emission characteristics diesel engine. The WTDL and 20% at regular intervals of 5%

Experimentation
The test was carried out on a single cylinder, four strokes, naturally aspirated, air cooled, DI diesel engine which has a maximum power out of 4.4 kW. The test engine specifications are provided in Table 1. For loading on the test engine an eddy current dynamometer is coupled to engine with the help of load cell. The engine is interfaced to a control panel, which is connected to a computer. The inputs obtained from different instruments are interfaced to a computer through an analog and digital converter card PCI-1050 which is mounted on the motherboard. A data acquisition system (DAS) integrated with a computer received data from different instruments which is then processed and displayed on the monitor.

Results and Discussion
This section discusses the results of the performance and emission parameters obtained from the test engine run on diesel, JB and different diesel-JB-WTDL blends.

Brake Thermal Efficiency
The brake thermal efficiency gives information regarding how efficient the energy in the fuel was converted in to power output [8]. Figure1 presents the power performance of the diesel and different test fuel blends derived engine under different loading conditions. It can be seen that under the same load, the greater efficiency is for diesel operated engine. In addition, the engine power increased linearly with the load for all the test fuels. As the load increases the heat generated in the cylinder increases, and hence, the brake thermal efficiency increases. At

Fig.1 Variation of brake thermal efficiency with brake power
The poor atomization of test fuels due to the higher viscosity may also be one of the causes for lower brake thermal efficiency than that of diesel. Among blends B20 produces highest brake thermal efficiency.

Carbon Monoxide Emission
The carbon monoxide (CO) emission characteristics of the engine run on diesel and different test fuel blends is presented in Fig. 2. It is known that the rate of CO emission is a function of the unburned fuel availability and mixture temperature, which controls the rate of fuel decomposition and oxidation. In the presence of sufficient oxygen, the CO emission is converted into carbon dioxide emission [9].The value of CO emission at full load for the diesel, JB, B5, B10, B15 and B20 blend was found to be 0.044, 0.035, 0.037, 0.04, 0.046 and 0.052%. The CO emission for the JB, B5 and B10 is marginally lower than those of diesel fuel. This could be due to the fact that JB contains excess oxygen which helps for better combustion. When the percentage of tire derived fuel increases beyond 10%, the CO emission increases drastically. This may be due presence of aromatic content which results in incomplete combustion, and may lead to higher CO emission [10]. The variation of hydrocarbon (HC) emission for diesel, JB and different test fuel blends is shown in Fig. 3. It is observed that hydrocarbon emission increases with the increase in percentage of WTDL in the diesel-JB-WTDL blends. The HC emission is lowest for JB and it was about 18 ppm at full load operation. This can be due to oxygen molecule present in biodiesel [11].The highest value of HC emission was obtained with B20 blend and was noticed to be 31 ppm.
But the addition of the tire derived liquid percentage results in higher HC emission. This is due to the fact that TPO has higher aromatic content, and hence may result in incomplete combustion and more HC emission for B15 and B20 compared to the other test fuels used in this study. The HC values for diesel, JB, B5, B10, B15 and B20 23,18, 19, 21,25 and 31 ppm are at full load.

Nitric Oxide Emission
The nitric oxide (NO) emission characteristics of the diesel and different test fuel blends derived engine at different load conditions are presented in Fig.4. It can be seen that the NO emission concentration increased with the load for all the test fuels. This is due to the fact that, because with increasing load, the temperature prevailing in the combustion chamber increases [12][13]

CONCLUSION
A single cylinder, four stroke, naturally aspirated, air cooled, DI diesel engine was operated successfully using diesel-JB-WTDL blends. The following conclusions are made based on the experimental results.
 The brake thermal efficiency of the engine was highest for the diesel and among different blend B10 gave higher brake thermal efficiency. At full load, the brake thermal efficiency is almost the same, i.e., 29.9% and 30.8% for B10 and diesel respectively, at full load.
 The CO and HC emissions were lower by about 9%, 19% respectively for B10, compared to diesel at full load.
 Nitric oxide emission was higher by about 21% for B10 in comparison with diesel at full load.
On the whole it is concluded, that the B10 blend can be used as fuel in a diesel engine directly, without any engine modification. The B10 gives the optimum result, compared to the other blends. The results from the experiments prove that B10 blend is good substitute for diesel fuel.