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Kinetic Study of Heterogeneous Reaction of Soot with Reactive Oxidants


EMSL Project ID
25430

Abstract

Heterogeneous reactions occurring between aerosol particles and reactive gaseous species in the atmosphere have significant impacts on atmospheric composition and chemistry, global radiative forcing, climate change, sky visibility, and public health. As a result, experimental investigation of the kinetics and mechanisms of pertinent atmospheric heterogeneous reactions is an active area of fundamental research in atmospheric aerosol chemistry. To date, the heterogeneous reactivity and chemistry involving soot, a key fraction of atmospheric aerosol particles, are poorly understood. This is due to a number of factors involved in studying these topics: its inherent complex surface structure, composition, morphology,and aging in ambient air. The proposed research will specifically focus on the aforementioned topics, i.e., a fundamental understanding of kinetics and mechanism of soots heterogeneous reaction with reactive species in the atmosphere: OH, O3, NOx, HNO3, etc, Soot samples collected from the field and an experimental burner will be tested using a novel substrate deposited particle approach, which was recently developed and used at EMSL to test another important heterogeneous reaction.

Project Details

Project type
Large-Scale EMSL Research
Start Date
2007-05-31
End Date
2010-09-30
Status
Closed

Team

Principal Investigator

Hai Wang
Institution
Stanford University

Team Members

Jeremy Cain
Institution
University of Dayton Research Institute

Yong Liu
Institution
University of California, San Diego

Chongmin Wang
Institution
Environmental Molecular Sciences Laboratory

Mark Engelhard
Institution
Environmental Molecular Sciences Laboratory

Paul Gassman
Institution
Pacific Northwest National Laboratory

Alexander Laskin
Institution
Purdue University

Related Publications

Cain JP, J Camacho, DJ Phares, H Wang, and A Laskin. 2011. "Evidence of Aliphatics in Nascent Soot Particles in Premixed Ethylene Flames." Proceedings of the Combustion Institute 33(1):533-540. doi:doi:10.1016/j.proci.2010.06.164
Cain JP, PL Gassman, H Wang, and A Laskin. 2010. "Micro-FTIR Study of Soot Chemical Composition – Evidence of Aliphatic Hydrocarbons on Nascent Soot Surfaces." Physical Chemistry Chemical Physics. PCCP 12(20):5206-5218. doi:10.1039/b924344e
D. Abid, E. D. Tolmachoff, D. J. Phares, H. Wang, Y. Liu, A. Laskin. “Size Distribution and Morphology of Nascent Soot in Premixed Ethylene Flames with and without Benzene Doping.” Proceedings of the Combustion Institute, 32, 681-688, (2009). doi:10.1016/j.proci.2008.07.023
Liu Y, Z Yang, Y Dessiaterik, PL Gassman, H Wang, and A Laskin.  2008.  "Hygroscopic Behavior of Substrate-Deposited Particles Studied by micro-FT-IR Spectroscopy and Complementary Methods of Particle Analysis."  Analytical Chemistry 80(3):633-642.  doi:10.1021/ac701638r
Y. Liu, J. P. Cain, H. Wang-, A. Laskin “Kinetic Study of Heterogeneous Reaction of Deliquesced NaCl Particles with Gaseous HNO3 Using Particle-on-Substrate Stagnation Flow Reactor Approach” J. Phys. Chem. A., 111, 10026-10043, (2007). doi:10.1021/jp072005p