کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6633517 | 461090 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of pyrolysis conditions on the structure of chars prepared from an Argentine asphaltite
ترجمه فارسی عنوان
تأثیر شرایط پیلوریس بر ساختار ارقام تهیه شده از آسفالتیت آرژانتین
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کلمات کلیدی
DTFHRTEMAsphaltite - آسفالتscanning electronic microscopy - اسکن میکروسکوپ الکترونیFixed bed - تخت ثابتReordering - تنظیم مجددAromaticity - عطر و طعمInterlayer spacing - فاصله InterlayerSEM - مدل معادلات ساختاری / میکروسکوپ الکترونی روبشیXRD - پراش اشعه ایکسX-ray diffraction - پراش اشعه ایکسPyrolysis - پیرولیز Char - کاراکترDrop tube furnace - کوره لوله قطرهGasification - گازسیون
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
As gasification reactivity of carbonaceous solid material chars is known to be strongly dependent on their formation conditions, a comprehensive study was carried out on the effects of pyrolysis conditions on structure of chars prepared from an Argentine asphaltite. The study comprised qualitative and quantitative analyses of char structures by X-ray diffraction, complemented with the characterization of physical morphology of char particles by scanning electronic microscopy and high-resolution transmission electronic microscopy. Effects of pyrolysis temperature, heating rate and holding time at the peak temperature were investigated separately in a fixed bed tubular reactor. Additionally, the overall effect of variations in time-temperature history of individual char particles was evaluated using a drop tube furnace reactor. Experimental results have shown that pyrolysis conditions have a strong influence on the asphaltite-derived char structure, producing a significant reordering of the carbonaceous matrix at high heat treatment temperatures that is evidenced by increments in aromaticity and crystalline carbon fraction. The resulting physical morphology of asphaltite-derived char particles was found to be profoundly influenced by the heating rate at which the volatile matter is released, due to the appearance of a liquid phase during the heating process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 182, 15 October 2016, Pages 623-631
Journal: Fuel - Volume 182, 15 October 2016, Pages 623-631
نویسندگان
Daniela Nassini, Gastón G. Fouga, Horacio E. Nassini, Ana E. Bohé,