توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Influence of activation temperature of constructive lime as heterogeneous catalyst in biodiesel production from canola oil
نویسنده(ها): ، ،
اطلاعات انتشار: هفتمین کنگره ملی مهندسی شیمی، سال
تعداد صفحات: ۸
In recent years, increasing energy demand and decreasing fossil fuel sources, encourage researchers to investigate on new energy supply, especially renewable energy. Biodiesel, as an alternative for traditional diesel fuel has attracted attention of many nations. It can be producedeasily, via methanolysis of vegetable oil in presence of appropriate catalyst. In present study, to evaluate constructive lime as catalyst and determine the appropriate pretreatment temperature, transesterification of canola oil in different pretreatment temperature and uniform operatingcondition were done. Operational conditions were as follows: atmospheric pressure; weight of catalyst: 1% based on initial oil weight; methanol\oil molar ratio: 12; reaction temperature, 65ºC; under vigorous mixing and reaction time was 5 hr. At these conditions, when activation temperature was 600°C, 91.16% conversion was obtained. For this product, dynamic viscosity and specific gravity of produced biodiesel were 4.4 cP and 0.882, respectively. Increasing in activation temperature did not change the conversion, much. When pretreatment temperature was lesser than600°C, the results were not acceptable<\div>

۲Double step biodiesel production from waste frying oil and evaluation as diesel fuel
نویسنده(ها): ، ،
اطلاعات انتشار: هفتمین کنگره ملی مهندسی شیمی، سال
تعداد صفحات: ۸
In recent decade, since the fossil fuel sources are diminished, many researchers have proposed to use a pure, non–toxic and biodegradable fuel which is called biodiesel, instead of traditional diesel fuel. Waste Frying Oil (WFO) as valueless material which disposed to environment can be used aspromising feedstock to produce biodiesel in Iran. In this study double step biodiesel production from waste frying oil were performed and the product was evaluated as diesel fuel. First, esterification and transesterification of WFO were carried out at 65°C, MeOH to oil molar ratio of6:1, 2 wt% of HCl as catalyst under vigorous mixing for 6 h. Yield of the reaction was 29.4%methyl ester and free fatty acid content of 0.918%.In second step, transesterification of acidprocessed WFO was done at 65°C , MeOH to oil molar ratio of 6:1, 1 wt% of KOH as catalyst under vigorous mixing for 2 h. Yield of the reaction was 93.1% methyl ester. Final produced biodiesel was very clear and had good characteristics as diesel fuel<\div>
نمایش نتایج ۱ تا ۲ از میان ۲ نتیجه