H2020Индивидуална стипендия2018–2021

USFAOD · Understanding soot formation using advanced optical diagnostics

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2018-09-01 → 2021-05-18
Финансиране от ЕС: 185 857 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Процесите по образуване на сажди при непълно горене се анализират чрез усъвършенствана оптична спектроскопия. По-доброто разбиране на тези механизми помага при изследванията върху климата и здравеопазването.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Understanding soot formation using advanced optical diagnostics

1. What is the problem being addressed? Soot is any black, blackish or brown aggregate, which mainly consists of carbon with a variety of bonding structures and are generated by incomplete combustion. The present understanding on soot suffers from the following important shortcomings: • Firstly, there is lack of sensitive and non-invasive measurements of the physical and chemical properties of soot under the wide range of combustion conditions. There is also a lack of techniques that can be applied on both molecules and particles. • Secondly, there are significant deficiencies in the understanding of particle growth, chemical and physical evolution and oxidation under combustion conditions. At the microscopic level, the crucial step from the molecular weight growth of large species to form nascent soot particles (called the nucleation process/the nucleation zone) is still speculative. 2. Why is it important for society? It is challenging to determine the detailed chemical and physical routes of the species leading to the first soot nucleus. However, any progress on the characterization in the soot inception zone will lead to reduce uncertainties on soot formation modelling and understand more deeply its formation. This project relies on a novel approach set on experimental investigations of the soot formation mechanism and soot characteristics. It is important to understand soot formation and soot properties that will be valuable for other research such as climate studies or health care system. 3. What are the overall objectives? • The main methodological/technical objective is further development of online Raman spectroscopy combining with other techniques to measure abundances of molecular species (or soot precursors) in the aerosol phase. • The core objective is to use optical diagnostics to improve knowledge on optical and structural properties of soot particles and to understand the formation of critical nucleus from the gas phase enabling the transition to the solid phase and the subsequent soot evolution in various combustion processes.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

Understanding the soot formation processes, the wide variety of soot structures and their optical properties plays a highly important role in reducing the amount of soot emissions from combustion, monitoring soot aerosols in the atmosphere and estimating their climate impacts. Their nucleation mechanisms and the soot nuclei properties, at the transition between molecules and nanoparticles, remain poorly understood and these are extremely hot topics in current researches. This ambitious project is aimed to shed the light on the soot nucleation processes and the soot nuclei characteristics via to the development and the combination of several state-of-the-art techniques, which are suitable to both molecules and particles. The outcomes will permit to fill the gaps in the understanding of the still mysterious nanoparticles formation in incomplete combustion. These techniques will be in-situ Raman spectroscopy, time-of-flight mass spectrometry, soot particle aerosol mass spectrometry, laser-induced fluorescence and laser-induced incandescence. The soot formation processes, from the soot molecular precursors to the mature soot nanoparticles, will be studied in the condensed phase (ex situ) after sampling and, in the frame of this project, an intense effort will be performed for their extensive study in situ, in the gas phase. The first and main target is to unveil soot nuclei properties and the phase transition in the inception zone, which are crucial for improving current models of soot nucleation. The second target is to progress decisively on the knowledge of the variety of optical and structural properties of soot, which are of high importance for combustion diagnostic in combustion reactors and for atmospheric science particularly because they are good proxies for primary black carbon aerosols. This proposal involves both training and transfer of knowledge and new techniques between the candidate and the host organization.

Оригинален текст от CORDIS (на английски).

Участници

LUNDS UNIVERSITET · LundКоординаторШвеция