کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10275047 | 461801 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characteristics of mesocarbon microbeads generated from a coal tar pitch with addition of micro-alumina powder
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Characteristics of mesocarbon microbeads generated from a coal tar pitch with addition of micro-alumina powder Characteristics of mesocarbon microbeads generated from a coal tar pitch with addition of micro-alumina powder](/preview/png/10275047.png)
چکیده انگلیسی
In the present experiments, mesocarbon microbeads (MCMBs) were prepared from a coal tar pitch with or without micro-Al2O3 powder under 410 °C for 7 h to study the influence of alumina on the MCMBs. OM, SEM, XRD and EDS were used to analyze the as-received MCMBs, among which SEM was used firstly to observe the microtextures of MCMBs systemically. The results show that the irregular alumina particles, which have been enwrapped in the MCMBs, impede the growth of the mesophase spheres and consequently decrease the yield of them. The textural layers of the formed MCMBs were disturbed by the aluminum oxide particles. Although the alumina in the spheres could escape and seems to maintain the sphericity of MCMBs during the graphitization, the bad influence would remain. In addition, ash analysis of MCMBs was carried out, which further confirmed the existence of alumina particles in the as-received spheres and the absence of them in the graphitized spheres. In conclusion, alumina in raw pitches is disadvantageous for the growth and the final structure of MCMBs and should be removed in advance if high yield and regular structure are expected.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel Processing Technology - Volume 87, Issue 1, December 2005, Pages 77-83
Journal: Fuel Processing Technology - Volume 87, Issue 1, December 2005, Pages 77-83
نویسندگان
Tong-Qi Li, Cheng-Yang Wang, Xiu-Jun Liu, Jia-Ming Zheng, Hui Wang,