DOI: 10.1016/j.atmosenv.2018.01.028
Scopus记录号: 2-s2.0-85041471611
论文题名: Chemical composition and heterogeneous reactivity of soot generated in the combustion of diesel and GTL (Gas-to-Liquid) fuels and amorphous carbon Printex U with NO2 and CF3COOH gases
作者: Tapia A ; , Salgado S ; , Martín P ; , Villanueva F ; , García-Contreras R ; , Cabañas B
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 177 起始页码: 214
结束页码: 221
语种: 英语
英文关键词: CF3COOH
; DRIFTS
; GTL soot
; Knudsen cell
; NO2 reactivity
Scopus关键词: Amorphous carbon
; Aromatic hydrocarbons
; Carbonyl compounds
; Diesel engines
; Dust
; Engine cylinders
; Fourier transform infrared spectroscopy
; Fuels
; Gas dynamics
; Gases
; Ketones
; Mass spectrometry
; Molecules
; Nitrogen
; Nitrogen oxides
; Petroleum industry
; Polycyclic aromatic hydrocarbons
; Uranium
; Carboxylic acids , aldehydes
; CF3COOH
; Chemical compositions
; Diffuse reflectance infrared fourier transform spectroscopies
; DRIFTS
; Heterogeneous reactions
; Knudsen cell
; Polycyclic aromatic hydrocarbons (PAHS)
; Soot
; aldehyde
; carbon
; carbonyl derivative
; carboxylic acid
; diesel fuel
; ester
; ether
; ketone
; nitrogen dioxide
; polycyclic aromatic compound
; trifluoroacetic acid
; Article
; chemical composition
; chemical reaction
; combustion
; diesel engine
; diffuse reflectance spectroscopy
; gas
; infrared spectroscopy
; liquid
; mass spectrometry
; priority journal
; soot
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: The heterogeneous reactions of nitrogen dioxide (NO2) and trifluoroacetic acid (CF3COOH) with soot produced by diesel and GTL (gas-to-liquid) fuels were investigated using a Knudsen flow reactor with mass spectrometry as a detection system for gas phase species. Soot was generated with a 4 cylinder diesel engine working under steady-state like urban operation mode. Heterogeneous reaction of the mentioned gases with a commercial carbon, Printex U, used as reference, was also analyzed. The initial and the steady-state uptake coefficients, γ0 and γss, respectively, were measured indicating that GTL soot reacts faster than diesel soot and Printex U carbon for NO2 gas reactant. According to the number of reacted molecules on the surface, Printex U soot presents more reducing sites than diesel and GTL soot. Initial uptake coefficients for GTL and diesel soot for the reaction with CF3COOH gas reactant are very similar and no clear conclusions can be obtained related to the initial reactivity. The number of reacted molecules calculated for CF3COOH reactions shows values two orders of magnitude higher than the corresponding to NO2 reactions, indicating a greater presence of basic functionalities in the soot surfaces. More information of the surface composition has been obtained using Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) before and after the reaction of soot samples with gas reactants. As conclusion, the interface of diesel and GTL soot before reaction mainly consists of polycyclic aromatic hydrocarbons (PAHs), nitro-compounds as well as ether functionalities. After reaction with gas reactant, it was observed that PAHs and nitro-compounds remain on the soot surface and new spectral bands such as carbonyl groups (carboxylic acids, aldehydes, esters and ketones) are observed. Physical properties of soot from both fuels studied such as BET surface isotherm and SEM analysis were also developed and related to the observed reactivity. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83055
Appears in Collections: 气候变化事实与影响
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作者单位: Universidad de Castilla - La Mancha, Departamento de Química Física, Facultad de Ciencias Químicas, Av. Camilo José Cela s/n, Ciudad Real, Spain; Universidad de Castilla - La Mancha, Instituto de Investigación en Combustión y Contaminación Atmosférica, Camino Moledores s/n, Ciudad Real, Spain; Parque Científico y Tecnológico de Castilla - La Mancha, Paseo de la Innovación 1, Albacete, Spain; Universidad de Castilla - La Mancha, Campus de Excelencia Internacional en Energía y Medioambiente, Escuela de Ingeniería Industrial, Real Fábrica de Armas, Edif. Sabatini, Av. Carlos III s/n, Toledo, Spain
Recommended Citation:
Tapia A,, Salgado S,, Martín P,et al. Chemical composition and heterogeneous reactivity of soot generated in the combustion of diesel and GTL (Gas-to-Liquid) fuels and amorphous carbon Printex U with NO2 and CF3COOH gases[J]. Atmospheric Environment,2018-01-01,177