Title

Assessing the performance of advanced biofuel blends using combined experimental and modelling approaches

Time: Dec. 15th, 5:00 PM Beijing

参会方式

蔻享学术直播 （扫码预约）

https://www.koushare.com/lives/room/660541

Speaker

Professor Alison Tomlin

School of Chemical and Process Engineering, University of Leeds

Abstract：

The utilization of petroleum derived diesel and gasoline in transport, machinery and small power generation sectors, contributes a substantial proportion of global greenhouse gas emissions. Whilst there has been rapid progress in the uptake of electric vehicles and renewable off-grid power sources, liquid fuels are likely to be used for some decades to come. It is therefore important, where possible, to displace petroleum derived liquid fuels with lower carbon alternatives. To date, liquid biofuels have formed the largest displacement, with ethanol and FAME (Fatty acid methyl esters) being the most commonly used. It is important however, to consider the wider sustainability impacts of alternative fuels, including land-use change and possible air quality impacts. For this reason, the EU is stipulating that a proportion of biofuels for the transport sector should contain advanced biofuel components. These are fuels produced from either waste products, or from dedicated energy crops that do not lead to deforestation or competition with land use for food production. Such feedstocks are likely to be lignocellulosic in nature and thus, the production of liquid fuels becomes more challenging than for first generation biofuels. The resulting fuels may be more complex in nature than commonly used biofuels such as ethanol and FAME. On the other hand, the ability to create mixtures of biofuel components offers the facility to tailor the blends in order to optimize their performance properties. It follows that, as we move to larger proportions of advanced biofuels in liquid fuel blends, we need to understand their performance when utilized in different engine environments as well as the impact that their blending with traditional fuels has on tailpipe emissions.

The presentation will discuss the wide range of requirements for drop-in alternative fuel replacements, both from the point of view of physical and combustion properties, and emissions. Examples will be presented based on both experimental and modelling studies. On a more fundamental level, the impact of the chemical structure of oxygenated biofuels on combustion performance will be discussed. The presentation will also investigate the suitability of available tools for the generation of detailed chemical mechanisms for describing the oxidation of complex oxygenated fuel blends, via case studies for both alcohols and mixtures of alkyl levulinates, ethers and alcohols. It will ask the question as to whether we can develop combustion models which can assist in the optimization of biofuel blend selection for new fuels. The importance of fundamental data of relevance to the functional groups present in advanced biofuels will be discussed, as well as the importance of suitable blending rules for predicting a range of blend properties.

Biography:

Alison Tomlin is Professor of Environmental Modelling in the School of Chemical and Process Engineering at the University of Leeds. She obtained her PhD from the School of Chemistry at Leeds and subsequently held Post-Doctoral positions at Leeds and Princeton Universities before joining the Department of Fuel and Energy at Leeds as a lecturer in 1994.  Her research interests cover a range of topics from the combustion of low carbon fuels, to the air quality impacts of combustion and city wide assessments of low carbon renewable potential. The development of high resolution, detailed models underlies the work, including methods for tracking uncertainties within model predictions. She was joint editor of "The Proceedings of the Combustion Institute" from 2012-2018 and has co-authored a book entitled "The Analysis of Kinetic Reaction Mechanisms" with Tamas Turányi from Eötvos Lorand University in Budapest. She is currently leading the EPSRC-SFI funded project “Tailored Production and Utilisation of Sustainable Low Cost Lignocellulosic Advanced Biofuel Blends as Diesel and Petrol Substitutes: SusLABB” jointly with Stephen Dooley from Trinity College Dublin.

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清华大学燃烧能源中心