scholarly journals Can hydrogen enriched biogas be used as domestic fuel? - Part II: Pollutants Emission from Combustion of Biogas/H2/air Fuel Mixture

2021 ◽  
Vol 28 (2) ◽  
pp. 68-74
Author(s):  
Udaya Kahangamage ◽  
Yi Chen ◽  
Quan Zhou ◽  
Chun Wah Leung
Keyword(s):  
Thermal Performance ◽  
Biogas Production ◽  
Fuel Mixture ◽  
Pollutant Emissions ◽  
Emission Characteristics ◽  
Environmentally Conscious ◽  
Performance And Emission ◽  
Wide Range ◽  
Pollutants Emission ◽  
Domestic Fuel

Biogas is considered a sustainable source of energy which is largely untapped owing to its inherent weaknesses such as low thermal performance and potentially harmful emissions. Its thermal performance and emission characteristics can be enhanced through the technique of enriching with higher grade fuel. In this research study, biogas enriched with hydrogen was tested for its emission characteristics. A synthetic biogas identified as BG60 (60% CH4 and 40% CO2) enriched with 20% hydrogen (80%BG60-20%H2) was used for the test. Experiments were carried out for combustion of the enriched gas for a wide range of Reynolds numbers and equivalence ratios. The results indicate that the enriched fuel emits less CO and NOx than commonly used domestic fuel LPG. It also has a better thermal and emission performance than BG60. The low pollutant emissions compared with LPG, use of renewable feedstock for biogas production, and competitive cost may make the blended 80%BG60-20%H2 an attractive sustainable alternative domestic fuel choice for environmentally conscious urban dwellers of modern cities.

scholarly journals A Study on a mechanical continuously variable injection timing system for improvement of agricultural small diesel DI engine

2014 ◽  
Vol 17 (4) ◽  
pp. 57-66
Author(s):  
Cong Huynh Thanh
Keyword(s):  
Engine Performance ◽  
Injection Pressure ◽  
Continuous Variable ◽  
Friction Torque ◽  
Maximum Deviation ◽  
Injection Timing ◽  
Emission Characteristics ◽  
Performance And Emission ◽  
Wide Range ◽  
Timing System

This paper presents the development of a MCVIT (mechanical continuous variable injection timing) system for evaluating effects of injection timing – one of the efficiently experimental methods for improving diesel engine performance and emission characteristics to match modern emission regulations and bio-fuels. A MCVIT system has been designed and built with the ability to adjust freely and directly the injection timing for a wide range from 0 to 40°CA BTDC (before top dead center) while keeping the same injection pressure rate. Some experiments have been done to verify its significant specifications such as friction torque – speed curve, accuracy and stability. The results show that the maximum friction torque of this system is around 2.6N.m over range of engine speed and its maximum deviation is ±1.0°CA over a large range of testing injection timing. Preliminary study on VIKYNO RV215-2 agricultural small diesel DI engine has also proved that the engine performance and emission characteristics are directly influenced by injection timing. Thus the developed MCVIT system is an efficient and low cost tool for R&D activities in small diesel engines.

A novel alternative fuel mixture (diesel–biodiesel–pentanol) for the existing unmodified direct injection diesel engine: performance and emission characteristics

2020 ◽  
Vol 44 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Prabhu Appavu ◽  
Venkata Ramanan Madhavan ◽  
Harish Venu ◽  
Jayaprabakar Jayaraman
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Engine Performance ◽  
Fuel Mixture ◽  
Combustion Efficiency ◽  
Emission Characteristics ◽  
Performance And Emission ◽  
Direct Injection Diesel Engine ◽  
Noticeable Improvement ◽  
Smoke Opacity

The present study investigated the performance and emission characteristics of a single cylinder direct injection diesel engine fuelled with diesel – jatropha biodiesel – pentanol blends. The test fuels used for the experiment include diesel fuel (Diesel), 80% diesel (v/v) – 20% jatropha biodiesel (v/v) (D80J20), 70% diesel (v/v) – 20% jatropha biodiesel (v/v) – 10% pentanol (v/v) (D70J20P10), and 60% diesel (v/v) – 20% jatropha biodiesel (v/v) – 20% pentanol (v/v) (D60J20P20). Studied performance characteristics include brake specific fuel consumption and torque, while emission characteristics include carbon monoxide, nitrogen oxides, and smoke opacity. Experimental results revealed that the addition of pentanol influenced a reduction in brake power and torque with a noticeable improvement in engine exhaust emissions. To conclude, the addition of pentanol (20%, v/v) to diesel–jatropha blends resulted in lowered CO, NOx, and smoke opacity by 41.76%, 27.6%, and 32.4%, respectively, because of improved oxygen content of the resulting ternary mixture and improved combustion efficiency.

Investigation of the Performance of a Diesel Engine Fueled by Biodiesel-Diesel Fuel Mixture With Addition of Nanoparticles

2017 ◽  
Author(s):  
Ahmed I. EL-Seesy ◽  
Ali K. Abdel-Rahman ◽  
Hamdy Hassan ◽  
Shinichi Ookawara ◽  
Meshack Hawi
Keyword(s):  
Diesel Engine ◽  
Dose Level ◽  
Diesel Fuel ◽  
Emission Reduction ◽  
Engine Performance ◽  
Fuel Mixture ◽  
Operating Conditions ◽  
Emission Characteristics ◽  
Engine Test ◽  
Performance And Emission

The current work presents the results of an experimental study that is conducted to investigate the effect of nanoparticles added to biodiesel-diesel fuel mixture. Nano-biodiesel-diesel mixture fuels were prepared by adding of multi-walled carbon nanotubes (MWCNTs). These nanoparticles were blended with biodiesel-diesel fuel in varying mass fractions using an ultrasonic stabilization. A diesel engine test rig was used to examine the effect of nanoparticles on engine performance and emission characteristics with a constant speed of 2500 rpm and different engine loads. The engine test results indicated that the biodiesel-diesel fuel blend slightly decreased the engine performance and increased its emission characteristics at all tested engine operating conditions. The use of nanoparticles was found to improve all engine performance parameters. Specifically, the maximum emission reduction was obtained at a dose level of 20 mg/l, where considerable emission reduction was observed; NOx by 14 %, CO by 30 %, and UHC by 34 %. Also, the best of both engine combustion characteristics and performance were reached at a dose level of 40–50 mg/l. Where the reduction in the brake specific fuel consumption was by 16 %, the increase in both the cylinder peak pressure Pmax, and maximum gross heat release rate dQg/dθmax. were 4 % and 1%, respectively. Finally, the recommended dose level to achieve a significant enhancement in all engine performance is 40 mg/l.

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