scholarly journals Forensic Studies on Spent Catalytic Converters to Examine the Effect of Diesel and B100 Pongamia Biodiesel on Emissions

2021 ◽  
Vol 13 (19) ◽  
pp. 10729
Author(s):  
N. Manjunath ◽  
C. R. Rajashekhar ◽  
J. Venkatesh ◽  
T. M. Yunus Khan ◽  
Vineet Tirth ◽  
...  
Keyword(s):  
Oxygen Content ◽  
Diesel Fuel ◽  
Fossil Fuel ◽  
Catalytic Converter ◽  
Compression Ignition ◽  
Catalytic Converters ◽  
Compression Ignition Engines ◽  
Efficiency And Effectiveness ◽  
Ic Engines ◽  
Increasing Demand

The ever-increasing demand for transport is sustained by fossil fuel-based internal combustion (IC) engines fitted with catalytic converters (CCs) while alternative options and fuels are still emerging. Biodiesel seems to be a potential alternate to diesel, but the formation of NOx and smoke are major issues. This study aimed to explore the effect of B100 Pongamia biodiesel on the performance of CCs and to assist the designers of compression ignition engines. This study included a comparison of deposits on the catalytic converter (CC) in the cases of diesel fuel and biodiesel. Forensic examination of the spent CCs after 250 h was performed by characterization using SEM/EDS. The amount and composition of the deposits were compared for the diesel and biodiesel, and the effectiveness of the CC. The study revealed that the efficiency of the CC increased in biodiesel. The amount of soot and deposits was greater at the engine side of the spent CC with diesel, including the atomic percentage (At. %) of C, while the minimum deposits and C At. % in the spent CC were at the exhaust side with biodiesel. Oxygen content in the deposits was greater in biodiesel. The efficiency and effectiveness of the CC increased with the biodiesel.

ETHANOL–BIODIESEL–DIESEL BLENDS AS A DIESEL EXTENDER OPTION ON COMPRESSION IGNITION ENGINES

Transport ◽  
2011 ◽  
Vol 26 (3) ◽  
pp. 303-309 ◽  
Author(s):  
Máté Zöldy
Keyword(s):  
Fossil Fuels ◽  
Cetane Number ◽  
Oil Industry ◽  
Diesel Oil ◽  
Compression Ignition ◽  
Compression Ignition Engines ◽  
Fuel Demand ◽  
Oil Mixtures ◽  
Increasing Demand ◽  
Natural Reserves

Increasing fuel demand, decreasing natural reserves and environmental consciousness have together led to testing and implementing new fuels and blending components of compression ignition engines. Biofuels are very commonly added to fossil fuels, mostly ethanol to gasoline and FAME to diesel. Harmonizing their properties with engines is a great challenge for automotive and oil industry. Increasing demand for diesel oil in Europe raised the question about the possibility of increasing the amount of bio extenders. There were and certainly there are a number of experiments aimed at substituting or blending diesel with other fuels. One group of such fuels makes bioethanol– biodiesel–diesel oil mixtures. The paper proposes a global overview on literature and presents the obtained results. The article explores the possibility of using bioethanol–biodiesel–diesel oil mixtures in vehicles and agricultural compression ignition engines. The main aspect of researches was to find blends substitutable for compression ignition engines. Investigations were made to determine the maximum volume of a renewable part thus reaching the same or similar power output with lowering emissions. The received results were used for environmental and economical investigations. The valorisation of the results shows that bioethanol–biodiesel–diesel blends fulfil the cetane number, viscosity and lubricity requirements for standard diesel. Practical measurements and engine tests show that the utilization of a new fuel decreases emissions from the engine. The results of agricultural feedstock calculation indicate that in Hungary the biofuel part of the investigated fuels can be produced from an overflow.

INVESTIGATION ON CHARACTERISTICS OF POME BLENDED DIESEL ENGINE

2015 ◽  
Vol 75 (8) ◽  
Author(s):  
Helmisyah Ahmad Jalaludin ◽  
Mohd Ruysdi Ramliy ◽  
Nik Rosli Abdullah ◽  
Salmiah Kasolang ◽  
Shahrir Abdullah ◽  
...  
Keyword(s):  
High Temperature ◽  
Combustion Chamber ◽  
Fuel Consumption ◽  
Oxygen Content ◽  
Diesel Fuel ◽  
Alternative Fuels ◽  
Sudden Increase ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Complete Combustion

The sudden increase in fuel prices due to diminishing petroleum resources and the pollution resulting from its use has resulted in research into alternative fuels such as biodiesel. In addition, the faster combustion and high temperature in the combustion chamber which results from petroleum diesel fuel leads to higher nitrogen oxide (NOx) and Particulate Matter (PM) emissions. Therefore, this research was conducted to investigate the effect of using palm oil methyl ester (POME) blends as alternative fuels on the performance and emission of a compression ignition engine. The performance of POME blends and diesel were compared by manipulating the load of the engine at 1800 rpm. The results obtained show that fuel consumption rate is higher for the POME blends compared to the diesel fuel and increases as the POME concentration increases. The increment of brake specific fuel consumption and the reduction of CO emission exhibit a relation to the increase in percentage of POME. This is mainly contributed by the higher oxygen content of POME which promotes complete combustion of the blends. However, efficient combustion from the blends as compared to diesel fuel resulted from higher oxygen content and cetane number leads to significant increase in exhaust temperature. This in turn increases NOx emissions since using POME blends is highly related to high temperature of combustion chamber. The experimental results proved that POME in compression ignition engine is a possible substitute to diesel.

The Influence of Butanol Use on the Diesel Engine’s Performance

2016 ◽  
Vol 822 ◽  
pp. 183-189
Author(s):  
Alexandru Dobre ◽  
Constantin Pană ◽  
Nikolaos Cristian Nuțu ◽  
Niculae Negurescu ◽  
Alexandru Cernat
Keyword(s):  
Diesel Engine ◽  
Numerical Modelling ◽  
Diesel Fuel ◽  
Engine Speed ◽  
Butyl Alcohol ◽  
Compression Ignition ◽  
Primary Alcohols ◽  
Maximum Torque ◽  
Fuel Blends ◽  
Compression Ignition Engines

Alcohols begin to show a real interest for their use as fuel at compression ignition engines due to require reducing the pollutants emissions, especially NOx emission. Among the primary alcohols, butyl alcohol (butanol) is considered to be of great perspective in its use as fuel in diesel engines due to its properties close to those of diesel fuel. It is miscible with the diesel fuel and the achieved blend is stable. In paper are presented some aspects regarding the diesel engine’s fuelling with butanol and diesel fuel blends using the experimental research and numerical modelling. The use of the butanol as a fuel for diesel engine has led to the reducing NOx emissions with about 25% and the Brake Specific Energetic Consumption (BSEC) with about 5% at the full load and the maximum torque engine speed.

scholarly journals Influence of Short Carbon-Chain Alcohol (Ethanol and 1-Propanol)/Diesel Fuel Blends over Diesel Engine Emissions

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1309
Author(s):  
María D. Redel-Macías ◽  
David E. Leiva-Candia ◽  
José A. Soriano ◽  
José M. Herreros ◽  
Antonio J. Cubero-Atienza ◽  
...  
Keyword(s):  
Diesel Fuel ◽  
Engine Performance ◽  
Sound Quality ◽  
Exhaust Emissions ◽  
Carbon Chain ◽  
Compression Ignition ◽  
Fuel Blends ◽  
Compression Ignition Engines ◽  
Alcohol Fuels ◽  
Short Carbon

Oxygenated fuels, in this case short carbon-chain alcohols, have been investigated as alternative fuels to power compression ignition engines. A major advantage of short-chain alcohols is that they can be produced from renewable resources, i.e., cultivated commodities or biomass-based biorefineries. However, before entering the market, the effects of short-chain alcohols on engine performance, exhaust emissions, noise and sound quality need to be understood. This work sheds light on the relationship between the physicochemical properties of the alcohol/diesel fuel blends (ethanol and 1-propanol) on engine performance, exhaust emissions and, for the first time, on noise and sound quality. It has been demonstrated that when the content of alcohol in blends increased, soot and soluble organic material emissions drastically decreased, mainly due to the increase of oxygen content in the fuel. Reduction in soot emissions combined with higher thermodynamic efficiency of alcohol fuels, with respect to diesel fuel, enable their utilization on compression ignition engines. There is also an improvement in the soot-NOx trade off, leading to large reductions on soot with a small effect on NOx emissions. The oxygen content within the fuel reduces CO and THC emissions at extra-urban driving operation conditions. However, hydrocarbons and CO emissions increased at urban driving conditions, due to the high heat of vaporization of the alcohol fuels which reduces cylinder temperature worsening fuel atomization, vaporization and mixing with air being more significant at lower cylinder temperature conditions (low engine loads and speeds). Similarly, the higher the presence of alcohol in the blend, the higher the noise emitted by the engine due to their low tendency to auto-ignition. The optimization of alcohol quantity and the calibration of engine control parameters (e.g., injection settings) which is out of the scope of this work, will be required to overcome noise emission penalty. Furthermore, under similar alcohol content in the blend (10% v/v), the use of propanol is preferred over ethanol, as it exhibits lower exhaust emissions and better sound quality than ethanol.

Analysis of Potential Application of Biogas Fuel in Modern Compression-Ignition Engines

2017 ◽  
Author(s):  
Michał Smieja ◽  
Sławomir Wierzbicki
Keyword(s):  
Fossil Fuel ◽  
Dual Fuel ◽  
Compression Ignition ◽  
Spark Ignition Engines ◽  
Fermentation Processes ◽  
Compression Ignition Engines ◽  
Biogas Plants ◽  
Ci Engine ◽  
The One ◽  
Toxic Fumes

Limited fossil fuel supplies and the necessary reduction in toxic fumes emission to the atmosphere are the main motives in conducting a search for the new, effective energy supplies. The one with potential is biogas. It is the product of natural fermentation processes of municipal waste in landfills or is produced in biogas plants out of agricultural and green waste. Due to creation under different conditions, its chemical composition varies. This is enormous obstacle in its effective application. Biogas is easily applied to fuel spark-ignition engines however intensive attempts are made to employ it in much more effective compression-ignition engines. Application of biogas require the use of dual-fuel CI engine. The point of the research described in this paper is to show the influence of different methanecarbon dioxide composition ratio in biogas on dual-fuel CI engine effectiveness.

scholarly journals Comparative studies of exhaust emission from diesel engine fuelled with diesel fuel and B100 fuel

2017 ◽  
Vol 170 (3) ◽  
pp. 126-130
Author(s):  
Stanisław KRUCZYNSKI ◽  
Marcin ŚLĘZAK ◽  
Wojciech GIS ◽  
Andrzej ŻÓŁTOWSKI ◽  
Maciej GIS
Keyword(s):  
Carbon Monoxide ◽  
Diesel Engine ◽  
Vegetable Oils ◽  
Diesel Fuel ◽  
Comparative Studies ◽  
Exhaust Emission ◽  
Chemical Characteristics ◽  
Compression Ignition ◽  
Compression Ignition Engines ◽  
Physical Chemical

The article presents a comparative study of carbon monoxide, hydrocarbons, nitrogen oxides and the mass and number of particulate of diesel engine fulled with diesel and B100. B100 is a biofuel produced from vegetable oils for vehicles with compression-ignition engines. B100 fuel and diesel have similar physical-chemical characteristics which have been analyzed. The research was carried out on an engine dynamometer in four cycles: ESC, ETC, WHSC and WHTC. The article provides an analysis of the research results, preceded by a discussion of the test cycles used.

Effect of Fuel Pilot Dose Parameters on Efficiency of Dual-Fuel Compression Ignition Engines Fuelled with Biogas

2016 ◽  
Vol 817 ◽  
pp. 19-26 ◽  
Author(s):  
Sławomir Wierzbicki ◽  
Michał Śmieja ◽  
Maciej Mikulski
Keyword(s):  
Carbon Dioxide ◽  
Global Warming ◽  
Energy Balance ◽  
Diesel Fuel ◽  
Electrical Energy ◽  
Dual Fuel ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Gaseous Fuels ◽  
Compression Ignition Engines

Increasing the share of renewable electrical energy in the overall energy balance is one of the major challenges of humanity. It is primarily connected with global warming and increasing environmental pollution. One of the ways to counteract this problem is to promote the importance of renewable fuels, including gaseous fuels which are relatively low in carbon.This paper presents the effects of selected parameters of a pilot dose of diesel fuel on the efficiency of a dual-fuel compression ignition engine. The dose of gaseous fuel powering the engine was a mixture of methane and carbon dioxide in varying proportions.

scholarly journals On the assessment of autoignition delay for Diesel fuel and Biodiesel B20

2018 ◽  
Vol 234 ◽  
pp. 03002
Author(s):  
Bogdan Radu ◽  
Alexandru Racovitza ◽  
Radu Chiriac
Keyword(s):  
Diesel Fuel ◽  
Compression Ignition ◽  
Single Cycle ◽  
Engine Operation ◽  
Compression Ignition Engines ◽  
Ci Engine ◽  
Biodiesel Fuels ◽  
Wu Method ◽  
Autoignition Delay ◽  
The Eu

The use of bio-fuels is a necessity nowadays, regulated by European legislation, which imposes to the EU-countries an increase in the substitution rate of classic fossil Diesel fuel. Biodiesel (B) fuel proves to be a reliable agent to fulfil this requirement, but a certain number of aspects have to be ameliorated regarding the compatibility of this kind of fuel with the existent compression ignition engines. One of these problems relies on the autoignition delay, on which the research results are still dispersed. The paper proposes an analysis of this autoignition delay when using a compression ignition (CI) engine fuelled with Diesel fuel and with blends of Diesel and Biodiesel fuels (B20 – 20% volumetric fraction of Biodiesel), starting from several correlations given by the literature, which are based on single-cycle analysis and application of the integral Livengood-Wu method. The obtained results offer an image of the in-cylinder processes complexity and of the B20 fuel behaviour related to the tested engine operation.

On-board conversion of alcohols to ethers for fumigation in compression ignition engines

2003 ◽  
Vol 217 (3) ◽  
pp. 155-164 ◽  
Author(s):  
H Armbruster ◽  
S Stucki ◽  
E Olsson ◽  
S Gjirja
Keyword(s):  
Mass Transfer ◽  
Catalytic Converter ◽  
Fixed Bed ◽  
Methanol Conversion ◽  
Bifunctional Catalyst ◽  
Fixed Bed Reactor ◽  
Compression Ignition ◽  
Warm Start ◽  
Compression Ignition Engines ◽  
Start Up

Fumigation of dimethyl ether (DME) is an interesting option for using methanol as a fuel in compression ignition engines. In this concept, a fraction of the methanol used as a fuel is catalytically converted on-board to DME and water, and the products of the conversion are introduced into the engine via the combustion air. With an optimized engine the performance as well as emissions are comparable with those obtained when running the engine on alcohol with polyethylene glycol as ignition improver. The methanol conversion has been tested with different catalysts under various conditions. Because of its superior thermal stability and the low costs, γ-Al2O3 has been selected as the most promising catalyst for converting methanol to DME in suffcient rates for an on-board application. The chemical kinetics and the mass transfer limitations of the γ-Al2O3 catalyst used for the methanol dehydration were evaluated. The rate-determining step of the catalytic reaction is found to be the reaction of adsorbed intermediates (the Langmuir-Hinshelwood mechanism); mass transfer is limited by Knudsen diffusivity. The kinetic data were used to design a catalytic converter for fuel processing on-board. Providing DME for fumigation in a 180 kW engine will require approximately 0.7 kg of catalyst. The compact catalyst is necessary for an effcient and fast start-up of the process. The transient behaviour (cold/warm start-up; load changes) of a fixed-bed reactor with γ-Al2O3 has been estimated using simplified models, which show that the cold start problem should be manageable in less than 1 min. With the hot gas of a methanol burner in front of the fixed bed or a bifunctional catalyst, the catalyst bed can be heated to 250 °C and the reaction of methanol to DME started within 25 s. This is an acceptable time for cold-starting an engine in heavy-duty vehicles.

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