Combustion Analysis and Study on Smoke and NOX Emissions of Diesel and Biodiesel Fueled CI Engines With Ethanol Blends

2011 ◽  
Author(s):  
Masoud Iranmanesh
Keyword(s):  
Particulate Matter ◽  
Diesel Engines ◽  
Substantial Reduction ◽  
Cetane Number ◽  
Biodiesel Fuel ◽  
Nox Emissions ◽  
Ethanol Addition ◽  
Ignition Quality ◽  
Reduction Of Nox ◽  
Ci Engines

Diesel engines suffer from high amount of soot, particulate matter and nitrogen oxides emissions in spite of their advantages such as high thermal efficiency, low CO and HC emissions. The use of Biodiesel in conventional diesel engines results in a substantial reduction of HC, CO and PM. Its higher cetane number improves the ignition quality. However it suffers from cold starting problems and increased NOx emissions when compared with diesel fuel. Reduction of NOx emissions and particulate matter simultaneously is quite difficult due to the Soot/NOx trade off. In this investigation, tests were conducted on a single cylinder DI diesel engine fueled with neat diesel and biodiesel as baseline fuel and addition of 5 to 20% ethanol on a volume basis in steps of 5 vol.% as a bio-resource supplementary oxygenated fuel to analyze the combustion and emissions characteristics. The results have shown a simultaneous reduction of NOx and smoke emissions in comparison with baseline fuels. A global overview of the results has shown that the 15% ethanol addition to diesel and biodiesel fuel produce the lowest smoke opacity. Meanwhile the lowest amount of NOX emissions belongs to the 10% and 15% ethanol addition to diesel and biodiesel respectively.

Enhancing Diesel Engine Performance and Reducing Emissions Using Binary Biodiesel Fuel Blend

2019 ◽  
Vol 142 (1) ◽  
Author(s):  
Paramvir Singh ◽  
S. R. Chauhan ◽  
Varun Goel ◽  
Ashwani K. Gupta
Keyword(s):  
Fuel Consumption ◽  
Diesel Fuel ◽  
Diesel Engines ◽  
Transport Sector ◽  
Biodiesel Fuel ◽  
Injection Timing ◽  
Fuel Blend ◽  
Fuel Blends ◽  
Fuel Mixing ◽  
Ci Engines

Fossil fuel consumption provides a negative impact on the human health and environment in parallel with the decreased availability of this valuable natural resource for the future generations to use as a source of chemical energy for all applications in energy, power, and propulsion. The diesel fuel consumption in the transport sector is higher than the gasoline in most developing countries for reasons of cost and economy. Biodiesel fuel offers a good replacement for diesel fuel in compression ignition (CI) diesel engines. Earlier investigations by the authors revealed that a blend of 70% amla seed oil biodiesel and 30% eucalyptus oil (AB70EU30) is the favorable alternative renewable fuel blend that can be used as a fuel in diesel engines. With any fuel, air/fuel mixing and mixture preparation impact efficiency, emissions, and performance in CI engines. Minor adjustments in engine parameters to improve air/fuel mixing and combustion are deployable approaches to achieve good performance with alternative fuel blends in CI engines. This paper provides the role of a minor modification to engine parameters (compression ratio, injection timing, and injection pressure) on improved performance using the above mixture of binary fuel blends (AB70EU30). The results showed that the use of AB70EU30 in modified engine resulted in higher brake thermal efficiency and lower brake specific fuel consumption compared to normal diesel for improved combustion that also resulted in very low tailpipe emissions.

scholarly journals Effective Reduction of NOx Emissions of Modern Medium Speed Diesel Engines

2020 ◽  
pp. 0812-0818
Author(s):  
Almir Blazevic ◽  
Dzevad Bibic ◽  
Mirsad Trobradovic ◽  
Ivan Filipovic ◽  
Kresimir Gebert
Keyword(s):  
Diesel Engines ◽  
Nox Emissions ◽  
Medium Speed ◽  
Effective Reduction ◽  
Reduction Of Nox

scholarly journals A Study on the High Load Operation of a Natural Gas-Diesel Dual-Fuel Engine

2020 ◽  
Vol 6 ◽  
Author(s):  
Shouvik Dev ◽  
Hongsheng Guo ◽  
Brian Liko
Keyword(s):  
Particulate Matter ◽  
Natural Gas ◽  
Diesel Engines ◽  
Thermal Efficiency ◽  
Direct Injection ◽  
High Load ◽  
Dual Fuel ◽  
Nox Emissions ◽  
Brake Thermal Efficiency ◽  
Dual Fuel Engines

Diesel fueled compression ignition engines are widely used in power generation and freight transport owing to their high fuel conversion efficiency and ability to operate reliably for long periods of time at high loads. However, such engines generate significant amounts of carbon dioxide (CO2), nitrogen oxides (NOx), and particulate matter (PM) emissions. One solution to reduce the CO2 and particulate matter emissions of diesel engines while maintaining their efficiency and reliability is natural gas (NG)-diesel dual-fuel combustion. In addition to methane emissions, the temperatures of the diesel injector tip and exhaust gas can also be concerns for dual-fuel engines at medium and high load operating conditions. In this study, a single cylinder NG-diesel dual-fuel research engine is operated at two high load conditions (75% and 100% load). NG fraction and diesel direct injection (DI) timing are two of the simplest control parameters for optimization of diesel engines converted to dual-fuel engines. In addition to studying the combined impact of these parameters on combustion and emissions performance, another unique aspect of this research is the measurement of the diesel injector tip temperature which can predict potential coking issues in dual-fuel engines. Results show that increasing NG fraction and advancing diesel direct injection timing can increase the injector tip temperature. With increasing NG fraction, while the methane emissions increase, the equivalent CO2 emissions (cumulative greenhouse gas effect of CO2 and CH4) of the engine decrease. Increasing NG fraction also improves the brake thermal efficiency of the engine though NOx emissions increase. By optimizing the combustion phasing through control of the DI timing, brake thermal efficiencies of the order of ∼42% can be achieved. At high loads, advanced diesel DI timings typically correspond to the higher maximum cylinder pressure, maximum pressure rise rate, brake thermal efficiency and NOx emissions, and lower soot, CO, and CO2-equivalent emissions.

Reducing the Environmental Pollution from Diesel Engine Fuelled with Eco- Friendly Biodiesel Blends

2019 ◽  
Vol 1 (2) ◽  
pp. 35-44
Author(s):  
Ramesh C ◽  
Murugesan A ◽  
Vijayakumar C
Keyword(s):  
Particulate Matter ◽  
Diesel Engine ◽  
Diesel Fuel ◽  
Diesel Engines ◽  
Direct Injection ◽  
Energy System ◽  
Compression Ignition Engine ◽  
Biodiesel Blends ◽  
Harmful Emissions ◽  
Ignition Quality

Diesel engines are widely used for their low fuel consumption and better efficiency. Fuel conservation, efficiency and emission control are always the investigation points in the view of researchers in developing energy system. India to search for a suitable environmental friendly alternative to diesel fuel. The regulated emissions from diesel engines are carbon monoxide (CO), Hydrocarbons (HC), NOx and Particulate matter. It creates cancer, lungs problems, headaches and physical and mental problems of human. This paper focuses on the substitution of fossil fuel diesel with renewable alternatives fuel such as Biodiesel. Biodiesel is much clear than fossil diesel fuel and it can be used in any diesel engine without major modification. The experiment was conducted in a single-cylinder four-stroke water-cooled 3.4 kW direct injection compression ignition engine fueled with non-edible Pungamia oil biodiesel blends. The experimental results proved that up to 40% of Pungamia oil biodiesel blends give better results compared to diesel fuel. The AVL 444 di-gas analyzer and AVL 437 smoke meter are used to measure the exhaust emissions from the engine. The observation of results, non-edible Pongamia biodiesel blended fuels brake thermal efficiency (3.59%) is improved and harmful emissions like CO, unburned HC, CO2, Particulate matter, soot particles, NOx and smoke levels are 29.67%, 26.65%, 33.47%, 39.57%, +/- 3.5 and 41.03% is decreased respectively compared to the diesel fuel. This is due to biodiesel contains the inbuilt oxygen content, ignition quality, carbon burns fully, less sulphur content, no aromatics, complete CO2 cycle.

scholarly journals Combustion and Emission Reduction Characteristics of GTL-Biodiesel Fuel in a Single-Cylinder Diesel Engine

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2201 ◽  
Author(s):  
Kibong Choi ◽  
Suhan Park ◽  
Hyun Gu Roh ◽  
Chang Sik Lee
Keyword(s):  
Diesel Engine ◽  
Emission Reduction ◽  
Cetane Number ◽  
Experimental Results ◽  
Biodiesel Fuel ◽  
Injection Timing ◽  
Nox Emissions ◽  
Biodiesel Blends ◽  
Reduction Characteristics ◽  
Blended Fuels

The purpose of this paper is to investigate the effects of using gas to liquid (GTL)-biodiesel blends as an alternative fuel on the physical properties as well as the combustion and emission reduction characteristics in a diesel engine. In order to assess the influence of the GTL-biodiesel blending ratio, the biodiesel is blended with GTL fuel, which is a test fuel with various blending ratios. The effects of GTL-biodiesel blends on the fuel properties, heat release, and emission characteristics were studied at various fuel injection timing and blending ratios. The test fuels investigated here were GTL, biodiesel, and biodiesel blended GTL fuels. The biodiesel blending ratio was changed from 0%, 20% and 40% by a volume fraction. The GTL-biodiesel fuel properties such as the fuel density, viscosity, lower heating value, and cetane number were analyzed in order to compare the effects of different mixing ratios of the biodiesel fuel. Based on the experimental results, certain meaningful results were derived. The increasing rate of the density and kinematic viscosity of the GTL-biodiesel blended fuels at various temperature conditions was increased with the increase in the biodiesel volumetric fraction. The rate of density changes between biodiesel-GTL and GTL are 2.768% to 10.982%. The combustion pressure of the GTL fuel showed a higher pressure than the biodiesel blended GTL fuels. The biodiesel-GTL fuel resulted in reduced NOx and soot emissions compared to those of the unblended GTL fuel. Based on the experimental results, the ignition delay of the GTL-biodiesel blends increased with the increase of the biodiesel blending ratio because of the low cetane number of biodiesel compared to GTL. As the injection timing is advanced, the NOx emissions were significantly increased, while the effect of the injection timing on the soot emission was small compared to the NOx emissions. In the cases of the HC and CO emissions, the GTL-biodiesel blended fuels resulted in similar low emission trends and, in particular, the HC emissions showed a slight increase at the range of advanced injection timings.

scholarly journals Selective Catalyst Reduction (SCR) Using Zeolite for Reduction of NOx Emissions in CI Engines

2021 ◽  
pp. 261-274
Author(s):  
Hemraj Chaudhary ◽  
Ayush Dwivedi ◽  
Venkateshwarlu Chintala ◽  
Ashish Karn
Keyword(s):  
Nox Emissions ◽  
Selective Catalyst ◽  
Reduction Of Nox ◽  
Catalyst Reduction ◽  
Ci Engines

Research on SSCR Technology to Reduce NOx Emissions for Diesel Engines

2014 ◽  
Vol 511-512 ◽  
pp. 811-814 ◽  
Author(s):  
Kai Zhang ◽  
Lu Yan Fan ◽  
Da Wei Qu
Keyword(s):  
Diesel Engines ◽  
Negative Impact ◽  
Mixing Time ◽  
Decomposition Temperature ◽  
Reducing Agent ◽  
Injection System ◽  
Nox Emissions ◽  
Reduction Of Nox ◽  
Current Reduction ◽  
Scr System

Mainly due to the current reduction of NOx that is SCR technology which has some problems, it is difficult to meet the increasingly stringent emission regulations.Then people study the SSCR system that uses solid reducing agent, the solid reducing agent has large ammonia density.SSCR system injects NH3 directly into the tail in the airway through the injection system ,which is directly mixing with the exhaust. Comparing with SCR system,the decomposition temperature is low,the mixing time is shorter,that also reduces the negative impact caused by injection.

Sign in / Sign up

Export Citation Format

Share Document