کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11007445 | 1521941 | 2018 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evaluation, development, and validation of a new reduced mechanism for methane oxy-fuel combustion
ترجمه فارسی عنوان
ارزیابی، توسعه و اعتبارسنجی یک مکانیزم کاهش یافته برای احتراق سوخت متخلخل
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کلمات کلیدی
DRGCSPDRGEPWDAOFDQSSAPCA - PCACO2 effect - اثر CO2Oxy-fuel combustion - احتراق سوخت OxyComputational Singular Perturbation - اختلال تکاملی محاسباتیPrinciple component analysis - تجزیه و تحلیل اجزای اصلQuasi-steady-state approximation - تقریبی نیمه حالت پایدارCombustion simulation - شبیه سازی احتراقSkeletal mechanism - مکانیسم اسکلتیDirected relation graph - نمودار رابطه هدایت شده
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
چکیده انگلیسی
The chemical kinetics under oxy-fuel combustion is significantly different from that of conventional air-combustion due to the effect of the high CO2 concentration. Although previous studies have made substantial achievement in reaction mechanisms for air-combustion, their performance under oxy-fuel conditions is still unknown. This study proposes a new 22-species, 19-step reduced mechanism for methane oxy-fuel combustion, developed using comprehensive mechanism evaluation, reduction, and validation methods. First, through quantitative error evaluation against a large experimental data set, for the first time we find that USC-Mech II obtains the best overall predictions among seven detailed combustion mechanisms in oxy-fuel conditions, particularly for the prediction of CO concentration. This detailed mechanism is then thoroughly simplified (including both skeletal and time-scale reduction) with error control under both atmospheric and pressurized oxy-fuel conditions. The obtained reduced mechanism is systematically validated using the detailed mechanism and the relative errors are found to be less than 10%. Relative to other mechanisms, this specially developed reduced mechanism for oxy-fuel combustion not only has minimal species, but also significantly improves the prediction of CO formation. The chemical influence of CO2 under oxy-fuel conditions is further discussed to identify dominant elementary reactions for CO formation, which is important for future development of methane oxy-fuel combustion.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Greenhouse Gas Control - Volume 78, November 2018, Pages 327-340
Journal: International Journal of Greenhouse Gas Control - Volume 78, November 2018, Pages 327-340
نویسندگان
Fan Hu, Pengfei Li, Junjun Guo, Kai Wang, Zhaohui Liu, Chuguang Zheng,