Diesel engine performance and emissions with fuels derived from waste tyres

Abstract

The disposal of waste rubber and scrap tyres is a significant issue globally; disposal into stockpiles and landfill poses a serious threat to the environment, in addition to creating ecological problems. Fuel production from tyre waste could form part of the solution to this global issue. Therefore, this paper studies the potential of fuels derived from waste tyres as alternatives to diesel. Production methods and the influence of reactor operating parameters (such as reactor temperature and catalyst type) on oil yield are outlined. These have a major effect on the performance and emission characteristics of diesel engines when using tyre derived fuels. In general, tyre derived fuels increase the brake specific fuel consumption and decrease the brake thermal efficiency. The majority of studies indicate that NOx emissions increase with waste tyre derived fuels; however, a few studies have reported the opposite trend. A similar increasing trend has been observed for CO and CO2 emissions. Although most studies reported an increase in HC emission owing to lower cetane number and higher density, some studies have reported reduced HC emissions. It has been found that the higher aromatic content in such fuels can lead to increased particulate matter emissions.

The Pyrolytic Fuel Production From Nutshell-Rice Husk Blends and Determination of Engine Performance and Exhaust Emissions in a Direct Injection Diesel Engine

“…At low engine speeds, CO is converted to the CO2. Oxidized carbons caused to release higher amount of CO2 [23].…”

Combustion and emission characteristics analysis of waste tyre pyrolysis oil

“…Step 2 [1] to vary the CR, so that CR can be changed during running condition. The setup has panel box consisting of air box fitted with manometer, a fuel tank, fuel measuring unit, transmitters for air and fuel flow measurements, indicator and hardware interface.…”

“…Tires after use are environmentally hazardous as these do not readily biodegrade and recover from their constituent components [1]. Around 1500 million tires are generated every year which potentially goes wasted and can be recycled to utilize [2].…”

Experimental Analysis of a Diesel Engine Run on Different Biodiesel Fuel Blends

“…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, JME, B10, B20, B30 and B40 are 23,18,19,21,25 and 31 ppm are at full load.…”

“…Also, they observed that 25% of neat Castor oil blended with 75% of diesel is the well-suited blend for Diesel engine without heating and/or without implementing any engine modifications. Deepanraj et al, [19] studied the performance characteristics of a single cylinder direct injection diesel engine with palm oil biodiesel and its blends. From their results, they reported that the acceptable\ thermal efficiencies were obtained, and the specific fuel consumption and exhaust gas temperatures were higher than the results obtained with diesel fuel.…”