The Influence of Multi-Walled Carbon Nanotubes Additives on Performance and Emission of CI Engine Using Blends of Non-Edible (Jatropha Methyl Esters) Biodiesel & Diesel

Abstract

This paper investigates the performance and emission characteristics of single cylinder diesel engine under various concentration of Multiwalled Carbon Nanotube (MWCNT) in blends B20 and B30 biodiesel were investigated to establish the effect of MWCNT as nano-additive on the blends biodiesel used in diesel engine and aims to reduce the emissions of hydrocarbon and carbon monoxide into the atmosphere.

Introduction

I. INTRODUCTION

A. Requirement for Renewable Alternate Fuels

 With our present known stores and the developing rate of utilization, it is expected that they are not going to keep going long. These limited assets of oil and very moved in specific locales of the world has offered ascend to continuous interruptions and vulnerabilities in its supply and also cost [6]

B.  Biodiesel-as Substitute Fuel for Diesel Engine

Due deficiency of diesel fuel and its expanding cost, a substitute wellspring of fuel for diesel is especially required. It has been found that vegetable oil hold exceptional guarantee in such manner since they can be delivered from the plants develop in rural areas [6]

II. LITERATURE REVIEW

It was found, the acceptable thermal efficiency of the engine were obtained with blends containing up to 50% volume of jaropha oil. From properties and engine test results it has been established that 40-50% of jatorpha can be relieved for diesel without any engine modification and preheating of the blends. [1] The CO emission was reduced by 73-94% by using B20 to B100 as compared to diesel. The smoke opacity was reduced by 20-80% by using B20 to B100 fuel as compared to diesel. The NOX emission was also found to be decreased with a usual reduction of 26% by using biodiesel and its blends with diesel as compared to diesel.[2] The brake thermal efficiency for biodiesel and its blends was found to be slightly higher than that of diesel fuel at tested load conditions and there was no difference between the biodiesel and its blended fuel efficiencies. For jatropha biodiesel and its blended fuels, the exhaust gas temperature increased with an increase in power and amount of biodiesel. But Diesel blends showed reasonable efficiency, lower smoke,CO2,CO,and HC, and slightly increase in NOX emission.[3]The increased exhaust gas temperature may heat the combustion chamber also thus accountable extra load on engine cooling and lubrication system.[4]  The emission CO, HC and smoke were reduced with MWCNT blended HOME as compared to neat HOME. The addition of MWCNT to honge oil methyl ester results in an increase in NOX emission as compared to neat HOME but lower than pure diesel. The author has reported, ensuring higher dispersion of MWCNTs in biodiesel is still a subject to research.[5] A light vehicular motor (auto motor) releases 1 to 2 kg toxins amid a day and overwhelming autos releases 660 kg of CO amid a year. The carbon monoxide is very lethal and the introduction for couple of hours to grouping of 30 ppm can make weaknesses physiological capacities [6] With the addition of Graphene, MWCNT, and silver nanoparticles to Home was enhanced the combustion characteristics and catalytic activity of the fuel, and thereby reduces emissions and ignition delay during the combustion process.[7] It was concluded that CNT blended emulsion fuel has potential advantage of improving engine performance and reducing emissions. [8]

For alumina blended test fuel, percentage reduction of NO emission by 9 %, Smoke opacity by 17 %, unburned hydrocarbon by 33 % and carbon monoxide by 20 % are observed along with percentage reduction of NO emission by 7 %, Smoke opacity by 20 %, unburned hydrocarbon by 28 % and carbon monoxide by 20 %for cerium oxide blended test fuel.[9]

III. METHODOLOGY

A. Fuel Preparation

In nanotechnology, sonication is most widely used technique for uniformly dispersing nanoparticles in base liquid. For preparing blends of diesel and biodiesel with Multiwalled Carbon Nanotube (MWCNT) Probe type ultrasonicator was used.

V. RESULT AND DISCUSSION

A. Emission Characteristics

The following emission parameters were measured and compared for diesel, diesel-biodiesel blends and blends with dispersed MWCNT:

• Carbon monoxide (CO)
• Hydrocarbon (HC)

1. Variation in Carbon Monoxide (CO) Emission

Fig.5.4 indicates the emission of Carbon Monoxide (CO) versus engine BP. The carbon monoxide emission from the engine is indirect indication of incomplete combustion of fuel caused by lack of combustion and poor mixing of air-fuel.  At the full load condition, the percentage composition of CO increases with increase in engine Brake Power for all fuel. Due to inherently oxygen content present in  biodiesel composition, the CO emission was marginally reduced with biodiesel blend fuel compare to conventional diesel for all loads. There was additional reduction in carbon monoxide (CO) emission with the nano additives (MWCNT) in blends of biodiesel B20 & B30. With increasing the concentration of MWCNT in blends of biodiesel the CO emission decreases for all fuel blends. The addition of MWCNT in base fuel improve the surface volume area by improving atomization of fuel which enhances air fuel mixing  and  burning  rate  gives  more  complete  combustion  and  hence  reduce CO emission.  The higher reduction in CO emission was observed at full load with nanoparticles dispersed blend compared to pure diesel and Blends without MWCNT. At full load the CO emission were 0.040% , 0.030%  & 0.031 for diesel, B20 & B30 respectively, where as it was 0.027%, 0.023%, 0.020%, 0.024%, 0.022% and 0.024% with B20C50, B20C75, B20C100, B30C50, B30C75 and B30C100 respectively. Hence at full load CO emission for B20C100 & B30C75 significantly reduce compare to B20 & B30. Also, it can be observed that MWCNT blended biodiesel shows lower CO emission compared to diesel and blends without MWCNTs.

2. Variation in Hydrocarbon (HC) Emission

The variation of hydrocarbon (HC) emission is represented in Fig. 5.1. The hydrocarbon emission from the engine is direct indication of incomplete combustion of fuel. The hydrocarbon emission for biodiesel  blends was lower for all brake power compare to pure diesel because of higher oxygen content of biodiesel.

The addition of MWCNT in  blends  of diesel and biodiesel  (B20 & B30) results in reduction in HC emission as seen in Fig. 5.1. The MWCNT nanoparticles added to the fuel improve the combustion which reduces HC emission. At lower load, there was no significant difference in HC emission among the test fuels because of lower fuel consumption rate at lower load. Also it is seen from the Fig. 5.1 that the HC emission decreases with increasing dosing level of MWCNT in the fuel.

VI. ACKNOWLEDGEMENT

My sincere thanks to Autus Nanolab Pvt. Ltd, Ahmedabad SVM AGRO PROCESSOR, Nagpur. For doing experiment and resources provided by them.

Conclusion

The performance and emission characteristics of single cylinder diesel engine under various concentration of MWCNT in blends B20 and B30 biodiesel were investigated to establish the effect of MWCNT as nano-additive on the blends biodiesel. Based on experimental results following conclusions is derived: The addition of nanoparticles in the fuel enhance the atomization of fuel which improve air fuel mixing and burning rate which gives more complete combustion. Hence there was noteworthy reduction in HC and CO emission by using MWCNT added biodiesel blends. At full load CO emission reduced by 10%, 25.81%, and 25.9% with B20C50, B20C75 and B20C100 compared to B20, and 22.6%, 29%, and 22.6% with B30C50, B30C75 and B30C100 respectively compared to B30, whereas significant reduction found in HC emission by 45.75%, 53.13%, and 53.12% with B20C50, B20C75 and B20C100 compared to B20, and 38%, 35.3%, and 35.3% with B30C50, B30C75 and B30C100 respectively compared to B30.

References

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Copyright

Copyright © 2023 V. R. Maniar, S. P. Gori. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.