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A theoretical study of the gas-phase reactions of propadiene with NO: mechanism, kinetics and insights

RSC Advances, ISSN: 2046-2069, Vol: 13, Issue: 31, Page: 21383-21392
2023
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Article Description

In this study, the conversion mechanisms and kinetics of propadiene (CH = C CH) induced by NO were researched using density functional theory (DFT) and transition state theory (TST) measurements. The NO-addition pathways to generate IM1 (CHONOCCH) and IM2 (CHCONOCH) play a significant role. P3 (CHCONOCHO + H) was the dominant addition/elimination product. Moreover, the results manifested that one H atom from the -CH- group has to be abstracted by NO radicals, leading to the final product h-P1 (CHCCH + HNO). Due to the high barrier, the H-abstraction pathway is not important for the propadiene + NO reaction. In addition, the computed k value of propadiene reacting with NO at 298 K is 3.34 × 10 cm per molecule per s, which is in accordance with the experimental value. The computed lifetime of propadiene oxidized by NO radicals was assessed to be 130.16-6.08 days at 200-298 K and an altitude of 0-12 km. This study provides insights into the transformation of propadiene in a complex environment.

Bibliographic Details

Wang, Haomin; Zhao, Meilian; Zuo, Qiwen; Liu, Mingxing; He, Xinyu; Wang, Zhiguo; Sun, Yuxi; Song, Ruojing; Zhang, Yunju

Royal Society of Chemistry (RSC)

Chemistry; Chemical Engineering

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