Fuel Composition for CO2 Reduction

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Key Info

Basic Information

Duration:
01.03.2019 to 28.02.2022
Organizational Unit:
Combustion Fundamentals
Funding:
Research Association for Combustion Engines (FVV)
Status:
Running
 

Motivation

Reducing CO2 emission is world-wide common issue. To correspond to the issues throughout the world, new generation fuels which enhance flame propagation and mitigate knocking should be considered in addition to the argument on e-fuel. The new generation fuels enhance engine thermal efficiency and reduce emission. Scientific motivation: Low temperature combustion and mitigating knocking are effective ways to enhance engine thermal efficiency. To realize the concepts, understanding the effect of turbulence intensity and chemical reaction on combustion is necessity. Since this understanding is fundamental research, the scope of application is wide, such as combustion modeling and elementary reaction modeling. Project objective: The object is to clarify the effect of new generation fuels on how they contribute to enhance thermal efficiency and reduce emissions. In this project, the new generation fuels cover the fuels described below. After this project, we would like to propose the discussion with oil industries on how to build up the sustainable society. 1) Fuels from refineries Support by oil industries is important. To consider the world situation, automakers should talk how to reduce CO2 emission with oil industries. This kind of concept helps all relevant players throughout the world. 2) Biofuels. This part includes existing biofuels such as ethanol and new molecules. 3) CO2-free fuels. This part include e-fuels.

Project goals and methods

The goal of the project is optimizing engine operation and fuel while improving combustion characteristics. Therby, the project is divided into five work packages: fuel design and reaction kinetic modeling, thermodynamic investigation, numerical investigation, 0D/QD based measurements analysis and improvement of 0D-models for future fuel compositions, and fuel optimization. The aim of the first work package is to identify suitable fuel components, which should be able to increase burning velocities, ignition delay times and thus the research octane number (RON), and to simultaneously reduce emissions, when added to the conventional gasoline fuels. For this purpose, experimental investigations are carried out in shock tube (ST) and rapid compression machine (RCM). In the first screening process, five promising fuel blends will be investigated in the RCM at lean fuel-air conditions in order to characterize the ignition behavior in the negative temperature coefficient (NTC) regime, which is very relevant for engine knocking. After identifying the two best fuel blends with regard to fuel kinetic, the second goal of the experimental investigations is to conduct a comprehensive test matrix for detailed characterization of these two high potential fuel blends. The experimental results are used as validation targets for kinetic modeling.