کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6643012 | 461175 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mechanisms and kinetic modelling of steam gasification of brown coal in the presence of volatile-char interactions
ترجمه فارسی عنوان
مکانیسم و مدل سازی جنبشی بخار گازسیون زغال سنگ قهوه ای در حضور تعامل های فرار-فرار
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کلمات کلیدی
زغال سنگ قهوه ای ویکتوریا، گازسیون، تعامل با فرار-فرار، سینتیک،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
It is known that Victorian brown coal has higher reactivity for gasification because of catalysis of inherent AAEM species than high-rank coal. However, the experimental results of steam gasification of brown coal in a fluidised-bed/fixed-bed reactor at 800 °C have suggested that the inhibitory effects of the volatile-char interactions on char gasification are not negligible. The mechanisms and kinetics model of the char gasification and volatile-char interactions were discussed to describe quantitatively the inhibition of char gasification by volatiles, in this study. The elementary reactions of the char gasification and volatile-char interactions, which are consist of the adsorption of free radicals from volatiles, the volatilisation of catalyst and the evolution of char structure affected by radicals from volatiles, were proposed. The L-H type reaction rate equations for brown coal gasification were determined, and the kinetics model was verified by the comparison with several series of experiments. The proposed kinetics model described the experimental results of the coal conversions and the concentrations of Na in char during steam gasification very well. This kinetics model would be useful in designing any industrial fluidised-bed gasifier for low-rank fuels and estimating their performance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 103, January 2013, Pages 7-13
Journal: Fuel - Volume 103, January 2013, Pages 7-13
نویسندگان
Shiro Kajitani, Hui-Ling Tay, Shu Zhang, Chun-Zhu Li,