Publication

Can soot particles emitted by airplane exhaust contribute to the formation of aviation contrails and cirrus clouds?

Hubert van den Bergh, Michel Rossi
2002
Journal Articles

Abstract

[1] Flame soot samples taken as surrogates for aviation soot have been generated under two limiting conditions of combustion in a rich and lean flame resulting in grey and black soot, respectively. Absolute mean surface residence times tau(s) of H2O adsorbed on soot ranging from 400 to 150 ms have been measured for black soot at 243 K and for grey soot at 193 K, respectively. The kinetic parameters for desorption of H2O adsorbed on grey and black soot are E-a = 7 +/- 0.5 and 9 +/- 0.6 kcal/mol, logA/ s(-1) = 8.8 +/- 0.5 and 8.5 +/- 0.5, respectively. We conclude that soot aerosol may be coated with H2O molecules in a sulfur-free pathway once the particles have cooled down to 500 K in the plume of aviation exhaust.

Official source

https://infoscience.epfl.ch/entities/publication/1dabf942-2cad-4c55-bd7d-67db43aa4abc

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

Hubert van den Bergh, Michel Rossi
2002
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/1dabf942-2cad-4c55-bd7d-67db43aa4abc

About this result

Related concepts (32)

Contrail

Contrails (ˈkɒntreɪlz; short for "condensation trails") or vapor trails are line-shaped clouds produced by aircraft engine exhaust or changes in air pressure, typically at aircraft cruising altitudes several miles above the Earth's surface. Contrails are composed primarily of water, in the form of ice crystals. The combination of water vapor in aircraft engine exhaust and the low ambient temperatures that exist at high altitudes allows the formation of the trails. Impurities in the engine exhaust from the fuel, including sulfur compounds (0.

Black carbon

Chemically, black carbon (BC) is a component of fine particulate matter (PM ≤ 2.5 μm in aerodynamic diameter). Black carbon consists of pure carbon in several linked forms. It is formed through the incomplete combustion of fossil fuels, biofuel, and biomass, and is one of the main types of particle in both anthropogenic and naturally occurring soot. Black carbon causes human morbidity and premature mortality. Because of these human health impacts, many countries have worked to reduce their emissions, making it an easy pollutant to abate in anthropogenic sources.

Aviation

Aviation includes the activities surrounding mechanical flight and the aircraft industry. Aircraft includes fixed-wing and rotary-wing types, morphable wings, wing-less lifting bodies, as well as lighter-than-air craft such as hot air balloons and airships. Aviation began in the 18th century with the development of the hot air balloon, an apparatus capable of atmospheric displacement through buoyancy.

Related publications (16)

Can soot particles emitted by airplane exhaust contribute to the formation of aviation contrails and cirrus clouds?

Chat with Graph Search

The role of local shipping emissions in aerosol-cloud interactions in the central Arctic

Isolating aerosol impacts on cloud properties and the surface radiative budget during an extreme Arctic warm air mass intrusion

Transport of blowing snow particles through turbulent motions