کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7078455 | 1459982 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Key role of temperature monitoring in interpretation of microwave effect on transesterification and esterification reactions for biodiesel production
ترجمه فارسی عنوان
نقش کلیدی نظارت دما در تفسیر اثر مایکروویو بر واکنش های ترانس اکسیداسیون و استرینگ برای تولید بیودیزل
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
Microwave effects have been quantified, comparing activation energies and pre-exponential factors to those obtained in a conventionally-heated reactor for biodiesel production from waste cooking oils via transesterification and esterification reactions. Several publications report an enhancement of biodiesel production using microwaves, however recent reviews highlight poor temperature measurements in microwave reactors give misleading reaction performances. Operating conditions have therefore been carefully chosen to investigate non-thermal microwave effects alone. Temperature is monitored by an optical fiber sensor, which is more accurate than infrared sensors. For the transesterification reaction, the activation energy is 37.1Â kJ/mol (20.1-54.2Â kJ/mol) in the microwave-heated reactor compared with 31.6Â kJ/mol (14.6-48.7Â kJ/mol) in the conventionally-heated reactor. For the esterification reaction, the activation energy is 45.4Â kJ/mol (31.8-58.9Â kJ/mol) for the microwave-heated reactor compared with 56.1Â kJ/mol (55.7-56.4Â kJ/mol) for conventionally-heated reactor. The results confirm the absence of non-thermal microwave effects for homogenous-catalyzed reactions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 161, June 2014, Pages 270-279
Journal: Bioresource Technology - Volume 161, June 2014, Pages 270-279
نویسندگان
Alex Mazubert, Cameron Taylor, Joelle Aubin, Martine Poux,