إنتاج وقود الديزل الحيوي من الزيت النباتي
Embed This Widget
Add the script tag and a data attribute to embed this widget.
Embed via iframe for maximum compatibility.
<iframe src="https://chemfyi.com/iframe/entity//" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>
Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://chemfyi.com/entity//
Add a dynamic SVG badge to your README or docs.
[](https://chemfyi.com/entity//)
Use the native HTML custom element.
تحويل زيت الطهي إلى ديزل حيوي عبر إعادة الأسترة
الهدف
تحويل الزيت النباتي إلى ديزل حيوي (إسترات ميثيل الأحماض الدهنية) عبر إعادة الأسترة بالميثانول بوجود محفز قلوي.
الخلفية
Biodiesel is produced by reacting triglycerides (vegetable oil) with methanol in the presence of a base catalyst (NaOH or KOH). The process replaces the glycerol backbone with methanol, producing fatty acid methyl esters (FAME) that can fuel diesel engines. Glycerol is the byproduct.
تحذيرات السلامة
- Methanol is toxic and flammable — work in fume hood
- NaOH is corrosive
- Do not heat methanol with open flames
- Adequate ventilation is essential
معدات الوقاية الشخصية المطلوبة
المواد
-
Vegetable oil (100 mL)Clean cooking oil
-
Methanol (20 mL)Anhydrous
-
Sodium hydroxide (NaOH) (1 g)Catalyst
-
Distilled water (100 mL)For washing
المعدات
الإجراء
Dissolve 1 g NaOH in 20 mL methanol to create sodium methoxide. Stir until fully dissolved.
Heat 100 mL of vegetable oil to 55°C in the Erlenmeyer flask on the hot plate.
Add the sodium methoxide/methanol solution to the warm oil. Stir vigorously.
Maintain temperature at 55-60°C and stir continuously for 30 minutes.
Transfer the mixture to a separating funnel and allow to settle for 15 minutes. Two layers should form.
Drain the lower glycerol layer (dark, viscous). The upper layer is crude biodiesel.
Wash the biodiesel layer gently with 50 mL warm distilled water. Allow to separate and drain the water.
Record the volume of biodiesel produced and calculate the conversion rate.
النتائج المتوقعة
Two distinct layers: biodiesel (clear, amber upper layer) and glycerol (dark, viscous lower layer). The biodiesel should be less viscous than the original oil. Typical yield is 85-95% by volume.
التنظيف
Glycerol can be disposed of down the drain (biodegradable). Dispose of methanol waste properly. Rinse glassware. The biodiesel should not be used as fuel without further purification.
التفاصيل
- الفئة
- Organic Synthesis
- الصعوبة
- Intermediate (High School)
- المدة
- 60 دقيقة
- التكلفة التقديرية
- $12,00
- الخطوات
- 8
- المواد
- 4