کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6656590 | 461654 | 2016 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of atmospheric gas on pyrolysis characteristics of briquetted lignite and surface properties of semi-char
ترجمه فارسی عنوان
اثرات گاز اتمسفر بر خصوصیات پیریلیزاسیون برنج و خصوصیات سطحی نیمه چارت
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کلمات کلیدی
DAFpyrrolic nitrogenLRCsPyrolysis atmosphereQuaternary nitrogenn-6CoGBrunauer–Emmett–Teller - Brunauer-Emmett-TellerDFT - DFTFourier transform infrared - تبدیل فوریه مادون قرمزIgnition temperature - دمای احتراقLow temperature pyrolysis - دمای پایین pyrolysisBET - شرطX-ray photoelectron spectra - طیف اشعه ایکس الکترونیکFTIR - طیف سنج مادون قرمزXPS - طیف نگاری فوتوالکترونی اشعه ایکسDensity functional theory - نظریه تابعی چگالیOxidized nitrogen - نیتروژن اکسید شدهPyridinic nitrogen - نیتروژن پرییدینیکSemi-char - نیمه چارتcoke oven gas - گاز کوره کوره
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
The physicochemical properties of semi-char produced by the pyrolysis of binder cold-briquetted lignite (BCBL) in a fixed bed reactor at 600 °C under different atmospheres of CO, CO2, CH4, H2, and N2 were investigated comprehensively. Using the N2 BET method, the specific surface area of the different semi-chars were in the range of 1.71-2.53 (m2 gâ 1), the pore volume and average pore diameter of the CO semi-char were lowest, and the N2 semi-char values were highest. In contrast, the Dubinin CO2 method at 0 °C gave specific surface areas of semi-chars in the range 165-192 (m2 gâ 1). The CO, N2 and CH4 semi-chars had the largest diameter, and the H2 semi-char had the lowest diameter. The TGA test indicates the ignition temperature of BCBL was lower than different semi-chars. The FTIR spectra of BCBL and different semi-chars revealed that the removal rate of the oxygen-containing functional groups showed the highest efficiency under CO atmosphere, thus representing that CO could help to cleave the ether bond. The C1s, O1s, N1s, and S2p spectra of semi-chars under different atmospheres were analyzed by XPS. Raman analysis was also conducted to study the degree of structural orderliness in different semi-chars, which has great significance to the compressive mechanical strength of it. The semi-char produced in an atmosphere of CO2 showed a more condensed crystalline structure and lowest compressive mechanical strength among all the semi-chars.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel Processing Technology - Volume 151, October 2016, Pages 40-49
Journal: Fuel Processing Technology - Volume 151, October 2016, Pages 40-49
نویسندگان
Jun Liu, Guo-qiang Li, Lei Chen, Ying Wang, Ying Xu, Xing-xing Qiao, Yong-fa Zhang,