نتایج جستجو برای: soot oxidation

تعداد نتایج: 120227  

2002
Michael Frenklach

The formation of polycyclic aromatic hydrocarbons (PAH) and soot has become one of the central themes of research activities in the area of combustion and pyrolysis of hydrocarbon fuels. The interest in the subject stems mostly from environmental concerns on pollutant emission from combustion devices. The research activities span experimental, theoretical, and computational efforts and cover a ...

2013
Sonia Ascaso María Elena Gálvez Rafael Moliner María Jesús Lázaro

Structured catalysts for the simultaneous removal of soot and nitrogen oxides were prepared by means of coating cordierite monoliths with alumina-based suspensions containing Cu, Co or Fe and Cs as the catalytically active phase. Textural and chemical properties of the coated monoliths were determined by means of N2-physisorption, SEM and temperature programmed reduction. Their activity in the ...

2015
Eleonora Aneggi Veronica Rico-Perez Carla de Leitenburg Stefano Maschio Lluís Soler Jordi Llorca Alessandro Trovarelli

Engineering the interface between different components of heterogeneous catalysts at nanometer level can radically alter their performances. This is particularly true for ceria-based catalysts where the interactions are critical for obtaining materials with enhanced properties. Here we show that mechanical contact achieved by high-energy milling of CeO2-ZrO2 powders and carbon soot results in t...

Journal: :New Journal of Chemistry 2021

Modified 'natural clay' with Ni and Co nanoparticles explored as efficient catalyst for low-temperature soot oxidation activity studies.

Journal: :Bulletin of Chemical Reaction Engineering & Catalysis 2017

2004
J.-O. Müller

Recently, particulate matter from diesel engines has become an important topic in environmental, scientific, and political discussions. European legislation on particulate matter (PM) emissions has made significant advancement with the adoption of limit value standards up to and including Euro IV for heavy-duty (HD) engines. Efforts to reduce soot particulate from automotive engine exhaust have...

2011
Beth Friedman Gourihar Kulkarni Josef Beránek Alla Zelenyuk Joel A. Thornton Daniel J. Cziczo

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. [1] We have studied ice formation at temperatures relevant to homogeneous and heterogeneous ice nucleation, as well...

2010
ADRIAN SABĂU

This paper presents an advanced version of the original software developed by the author in order to simulate the combustion in the Diesel engines, focusing on simulate soot formation. Complex kinetic mechanisms are need for realistic modeling of shoot formations, but this is applicable only for simple flame computations (e.g. one dimensional, laminar, etc.). For real turbulent flame calculatio...

2011
V. Zelenay A. S. H. Prévôt

Soot particles can significantly influence the Earth’s climate by absorbing and scattering solar radiation as well as by acting as cloud condensation nuclei. However, despite their environmental (as well as economic and political) importance, the way these properties are affected by atmospheric processing of the combustion exhaust gases is still a subject of discussion. In this work, individual...

2013
Xiao Fu Xu Han Kenneth Brezinsky Suresh Aggarwal

Most liquid fuels contain compounds with one or more unsaturated CC bonds. Previous studies have observed that the fuel reactivity and ignition behavior are strongly influenced by the presence and number of double bonds in the fuel molecular structure. Here, we report a numerical investigation on the effect of fuel unsaturation on PAHs and soot emissions in partially premixed flames (PPFs) bur...

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