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Experimental study on the oxidation reaction parameters of different carbon structure particles
Author(s) -
Zhao Yang,
Wang Zhong,
Liu Shuai,
Li RuiNa,
Li MingDi
Publication year - 2015
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.12101
Subject(s) - materials science , raman spectroscopy , carbon fibers , gravimetric analysis , graphite , analytical chemistry (journal) , particle (ecology) , combustion , reactivity (psychology) , methanol , thermogravimetric analysis , chemical engineering , chemistry , composite material , organic chemistry , medicine , physics , oceanography , alternative medicine , pathology , composite number , optics , geology , engineering
This study explores the effect of the difference in the carbon structure of particles on their reactivity towards O 2 . Particles with three types of carbon structures were captured in the exhaust of a diesel engine fueled with blends of diesel with 0, 5, and 15 vol % methanol (designated here as M0, M5, and M15). The Raman spectra were used to designate the particles as a high graphitization structure (L1), a secondary graphitization structure (L2), or a low graphitization structure (L3) according to the carbon cluster content, degree of graphitization, and degree of graphite structure disorder. Additional parameters were measured by thermo‐gravimetric analysis, including the conversion rates, activation energies, ignition temperatures, and combustion and burnout characteristic indices of L1, L2, and L3. The results indicate that the particle conversion differed minimally in the low‐temperature region; however, when the temperature rose to 350°C, the conversion of L3 was much higher than that of L1 or L2. The conversion rates of L1, L2, and L3 each showed a single peak, with corresponding temperatures of 452°C, 427°C, and 400°C, respectively. The conversion rate of L3 was significantly higher than that of L1 or L2. The average activation energy of L3 particles was found to be lower than that of L1 particles by 34 kJ/mol. The ignition temperature of L3 particles was found to be lower than that of L1 particles by 82°C. The combustion and burnout characteristic indices were higher for L3 particles than for L1 and L2. © 2015 American Institute of Chemical Engineers Environ Prog, 34: 1063–1071, 2015