کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
210155 461699 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transesterification of soybean oil to biodiesel using zeolite supported CaO as strong base catalysts
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Transesterification of soybean oil to biodiesel using zeolite supported CaO as strong base catalysts
چکیده انگلیسی

A series of supported CaO catalysts with NaY, KL and NaZSM-5 zeolites as supports were prepared by microwave irradiation and used to catalyze the transesterification of methanol with soybean oil. The activities of synthesized catalysts were investigated compared to pure CaO. It was found that the activity of CaO catalyst increased after supported on zeolites, and the CaO/NaY exhibited the best performance. The improved catalytic activity was attributed to the increase of BET values and the concomitant increase of basic strength and basicity after dispersed on NaY zeolite through microwave irradiation. The prepared catalysts were characterized by several techniques such as X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) surface area, scanning electron microscopy (SEM) and the Hammett indicator method. In addition, the factors affecting biodiesel yield were investigated to optimize the reaction conditions. A biodiesel yield of 95% was achieved (using the CaO/NaY catalyst) with 30 wt.% of CaO loading on NaY zeolite, methanol/soybean oil molar ratio 9, reaction temperature 65 °C, reaction time 3.0 h and catalyst/oil mass ratio 3%. The results indicated that the supported catalyst had the capacity of water resistance and acid resistance. A high yield (more than 80%) could be obtained when the acid value and the water content of oil were less than 4 mg KOH/g and 1.5%, respectively.


► Supported catalysts CaO/zeolites were prepared by microwave irradiation.
► The activities of catalysts in biodiesel production were investigated.
► The CaO/NaY zeolite catalyst showed superior catalytic activity.
► The improved catalytic activity is due to the increase of BET value and basicity.
► The CaO/NaY catalyst has the capacity of water resistance and acid resistance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel Processing Technology - Volume 109, May 2013, Pages 13–18
نویسندگان
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