کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5372670 1504180 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Addition and abstraction kinetics of H atom with propylene and isobutylene between 200 and 2500 K: A DFT study
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Addition and abstraction kinetics of H atom with propylene and isobutylene between 200 and 2500 K: A DFT study
چکیده انگلیسی


- The reactions of H atom with propylene and isobutylene were studied using DFT methods.
- The rate coefficients were calculated using CTST coupled with HO, HR and FR models.
- Thermodynamic parameters are computed for all the possible channels.
- Rate coefficients are useful in modeling the combustion of higher hydrocarbons.

The rate coefficients for the reactions of hydrogen (H) atom with propylene and isobutylene were studied at M06-2X/6-31+G(d,p) and MPWB1K/6-31+G(d,p) level of theories between 200 and 2500 K. The possible mechanism for the reactions of propylene and isobutylene with H atom were examined. The rate coefficients for each reaction channels were calculated over a wide range of temperature using Conventional Transition State Theory (CTST). The quantum mechanical tunneling effect was computed using parabolic model and were included in the rate coefficient calculations. The Arrhenius expressions for the reactions, propylene + H and isobutylene + H were estimated to be kpropylene+H = (9.68 ± 0.17) × 10−18 T2.16exp[−(131 ± 10)/T] cm3 molecule−1 s−1 and kisobutylene+H = (1.40 ± 0.22) × 10−16 T1.89exp[−(215 ± 12)/T] cm3 molecule−1 s−1, respectively. Theoretically calculated rate coefficients are found to be in good agreement with the available experimentally measured rate coefficients.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 491, 10 July 2017, Pages 82-94
نویسندگان
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