Influence of Trace Nitrogen Oxides on Natural Gas Oxidation: Flow Reactor Measurements and Kinetic Modeling

Published on Mar 16, 2017in Energy & Fuels3.02
· DOI :10.1021/acs.energyfuels.6b02369
Fahd E. Alam4
Estimated H-index: 4
Francis M. Haas15
Estimated H-index: 15
+ 1 AuthorsFrederick L. Dryer4
Estimated H-index: 4
The reactivity-promoting effect of trace nitrogen oxides (NOx) on post-induction oxidation of a synthetic natural gas (2% ethane in methane) has been experimentally studied in a high-pressure laminar flow reactor (HPLFR) at 10 ± 0.1 atm, nominal reaction temperature of 818 ± 5 K, and several equivalence ratios (φ ∼ 0.5, 1.0, and 2.0). Each set of experimental measurements was simulated using several literature C0–C2 + NOx kinetic models, both recent and legacy, using approaches shown to lead to robust interpretation of present experimental conditions. Coupling between the NOx and C0–C2 submodel components of these models varies significantly in both qualitative (mechanistic) and quantitative character. A comparison among the experimental measurements and modeling results serves to highlight important kinetic features particular to application-relevant natural gas oxidation in presence of trace (∼25 ppm) NOx. Additional insight is offered by a baseline experiment with no NOx perturbation, which shows that ...
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