Open AccessNO Reburning by CH4-H2 Mixture under High CO2 Concentration in a Jet-Stirred Reactor
Author(s) -
Liwen Liang,
Pengfei Li,
Daohua Zu,
Fan Hu,
Zhaohui Liu
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/621/1/012044
Subject(s) - jet fuel , dilution , chemistry , analytical chemistry (journal) , combustion , nuclear chemistry , materials science , thermodynamics , organic chemistry , physics
New experimental and numerical results for NO reduction of CH 4 -H 2 mixture were obtained in a 0-dimensional jet stirred reactor (JSR), the effects of the following four factors are considered: temperature( T ): 800-1300 K; equivalence ratio( φ ): 0.5-2.5; proportions of H 2 :CH 4 in fuel: 0:6, 1:5, 3:3 and 5:1 (expressed in terms of FUEL-CH4, FUEL-1:5, FUEL-3:3 and FUEL-5:1, respectively); CO 2 concentration in dilution gas: 0, 30% and 60% (expressed by terms D-N 2 , D-30%CO 2 and D-60%CO 2 , respectively). Compared with pure CH 4 , mixing with H 2 weaken the NO reduction in high temperature region, The NO reburning reduction rate of FUEL-3:3 increases first and then decreases with the increase of φ . The strongest reduction effect is obtained at T =1300 K and φ =1.2, and the reduction efficiency is about 70%. The NO reburning reaction was obviously inhibited by increasing CO 2 concentration, but the effect was limited when the CO 2 concentration reached a certain level. The reburning effect of FUEL-CH 4 , FUEL-1:5, FUEL-3:3 is approximative, but the reburning effect of FUEL-5:1 is significantly inhibited by high proportions of H 2 :CH 4 .