식물성 기름에서 바이오디젤 생산

에스테르 교환 반응으로 식용유를 바이오디젤로 변환하기

Organic Synthesis Intermediate (High School) 60 분 ~$12.00

목표

메탄올과의 염기 촉매 에스테르 교환 반응으로 식물성 기름을 바이오디젤(지방산 메틸에스테르)로 변환한다.

배경

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.

안전 경고

  • Methanol is toxic and flammable — work in fume hood
  • NaOH is corrosive
  • Do not heat methanol with open flames
  • Adequate ventilation is essential

필수 개인 보호 장비

goggles gloves lab_coat

재료

  • Vegetable oil (100 mL)
    Clean cooking oil
  • Methanol (20 mL)
    Anhydrous
  • Sodium hydroxide (NaOH) (1 g)
    Catalyst
  • Distilled water (100 mL)
    For washing

장비

500 mL Erlenmeyer flask Hot plate with stirrer Separating funnel Thermometer Magnetic stir bar

실험 절차

1

Dissolve 1 g NaOH in 20 mL methanol to create sodium methoxide. Stir until fully dissolved.

5 분 Exothermic — methanol is flammable
2

Heat 100 mL of vegetable oil to 55°C in the Erlenmeyer flask on the hot plate.

5 분
3

Add the sodium methoxide/methanol solution to the warm oil. Stir vigorously.

2 분
4

Maintain temperature at 55-60°C and stir continuously for 30 minutes.

30 분 Keep in fume hood
5

Transfer the mixture to a separating funnel and allow to settle for 15 minutes. Two layers should form.

15 분
6

Drain the lower glycerol layer (dark, viscous). The upper layer is crude biodiesel.

3 분
7

Wash the biodiesel layer gently with 50 mL warm distilled water. Allow to separate and drain the water.

5 분
8

Record the volume of biodiesel produced and calculate the conversion rate.

3 분

예상 결과

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.

정리

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.

세부 정보

카테고리
Organic Synthesis
난이도
Intermediate (High School)
소요 시간
60 분
예상 비용
$12.00
단계
8
재료
4

더 많은 실험

아세트산에틸의 피셔 에스테르화 90 min 아세트아미노펜(파라세타몰) 조제 80 min 아스피린(아세틸살리실산) 합성 90 min 루미놀 합성 120 min 비누화 반응으로 비누 만들기 60 min 차에서 카페인 추출 90 min 바나나 오일(아세트산이소아밀) 합성 90 min 알돌 축합(디벤잘아세톤) 75 min 나일론 6,10 합성(나일론 로프 트릭) 30 min 슬라임 합성(가교 PVA) 20 min

Frequently Asked Questions

What is the objective of 식물성 기름에서 바이오디젤 생산?
메탄올과의 염기 촉매 에스테르 교환 반응으로 식물성 기름을 바이오디젤(지방산 메틸에스테르)로 변환한다.
How difficult is 식물성 기름에서 바이오디젤 생산?
This experiment is rated as Intermediate (High School). It takes approximately 60 minutes to complete.
What safety precautions are needed for 식물성 기름에서 바이오디젤 생산?
Key safety precautions include: Methanol is toxic and flammable — work in fume hood; NaOH is corrosive; Do not heat methanol with open flames.
What materials are needed for 식물성 기름에서 바이오디젤 생산?
The main materials required are: Vegetable oil, Methanol, Sodium hydroxide (NaOH), Distilled water.
What results should I expect from 식물성 기름에서 바이오디젤 생산?
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.