کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7606411 | 1492947 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Direct synthesis of hollow carbon nanofibers on bio-char during microwave pyrolysis of pine nut shell
ترجمه فارسی عنوان
سنتز مستقیم نانو فیبرهای توخالی کربن بر روی زیست چرم در طی پیرولیز مایکروویو پوسته نارنج کاج
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کلمات کلیدی
نانویی فیبر کربن توخالی، بیوگرافی، پیرولیز مایکروویو، ساختار کربن،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
Hollow carbon nanofibers (HCNFs) were formed on the bio-char surface during microwave pyrolysis of pine nut shell in the temperatures range of 400-700â¯Â°C without the use of any additional catalyst, except activated carbon added as a microwave absorber. Scanning electron microscopy (SEM) analysis showed that HCNFs were only formed on microwave pyrolysis chars and not fixed-bed chars, suggesting that microwave irradiation had a major influence on their formation. High resolution transmission electron microscope (HRTEM) results showed that the synthesized HCNFs at 500â¯Â°C and 600â¯Â°C had a diameter of about 400â¯nm and length of 1400-5000â¯nm. HCNFs had multi-walled structure with a d-spacing of about 0.35â¯nm. Unlike fixed-bed bio-chars, the X-ray diffraction (XRD) analysis of the microwave bio-chars showed typical graphite peak at around 2θâ¯=â¯26.3° with the strongest peak observed in 600â¯Â°C bio-char. Raman spectroscopy analysis revealed that the highest degree of carbon order of HCNFs was achieved at 600â¯Â°C, which agreed well with XRD analysis results. Detailed analysis of the volatiles evolved during microwave pyrolysis suggested that hydrocarbons in bio-oil such as benzene and alkenes and CO, CO2, methane, and ethane in bio-gas acted as the carbon source during formation of HCNFs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Analytical and Applied Pyrolysis - Volume 130, March 2018, Pages 142-148
Journal: Journal of Analytical and Applied Pyrolysis - Volume 130, March 2018, Pages 142-148
نویسندگان
Jian Zhang, Arash Tahmasebi, Joy Esohe Omoriyekomwan, Jianglong Yu,