Tổng hợp biodiesel từ dầu thải - From small to large scale biodiesel synthesis from waste frying oil

From small to large scale biodiesel synthesis from waste frying oil

B CÔNG TH Ộ CÔNG THƯƠNG ƯƠNG NG

TR ƯỜNG ĐẠI HỌC CÔNG NGHIỆP TP HCM NG Đ I H C CÔNG NGHI P TP HCM ẠI HỌC CÔNG NGHIỆP TP HCM ỌC CÔNG NGHIỆP TP HCM ỆP TP HCM

KHOA CÔNG NGH HÓA Ệ HÓA

From small to large scale biodiesel synthesis from waste

frying oil

Authors : Fatiha Ouanji et al 2016

Presenter : TRAN THI QUYNH MAI

Lecturer : PhD DO QUY DIEM

Present date : 31 March 2019

1 Introduction

2 Methods

3 Outstanding results

4 Optimal conditions

5 Conclusions

Why do we use waste frying oil (UFO)?

20-30 kg/day Lower cost

https://

vnexpress.net/khoa-hoc/bi en-dau-an-phe-thai-thanh-dau-diesel-2085453.html

 Develop ways that efficiently reduce the cost of biodiesel production.

 Optimize the conditions for lab-scale synthesis of Biodiesel from UFO

 Develop ways that efficiently reduce the cost of biodiesel production.

 Optimize the conditions for lab-scale synthesis of Biodiesel from UFO

Waste frying oil

Pretreat

1 Centrifugation

2 Filter

3 Dehydration at 115 °

Preheat 60 °C

Alkadi (KOH)

Stirring in MeOH *

T * , t *

Stored for 8h

UFO

Vacuum distillation Purification

Drying at 80 °C

Biodiesel

Unreact alcohol & water

Outstanding results Compositions of UFO and RFO

UFO has much higher acid value than RFO

Outstanding results Effect of reaction time

Effect of reaction time on biodiesel yield: RFO/AGM (a), RFO/PCM (b); UFO /AGM (c); UFO/PCM (d)

Reaction conditions: KOH 1.2 wt.%, reaction temperature 60°C, reaction time 2 h and molar ratio 6:1

→ Yield ↓

Purities of MeOH and oil ↓

→ Yield ↓

Outstanding results Effect of catalyst conc

Effect of catalyst concentration on biodiesel yield RFO/AGM (a): RFO/PCM (b);

UFO/AGM (c): UFO/PCM (d)

(Reaction conditions: reaction temperature 60°C, reaction time 2 h and molar ratio

Outstanding results Effect of MeOH/oil

Ratio ↑ → yield ↑

Outstanding results Physicochemical properties of biodiesel

Not too far

to EU standard

Outstanding results Biodiesel analysis

1H-NMR spectrum of biodiesel obtained with UFO/PCM, methanol /oil

Optimal conditions

1 Catalyst : KOH * 1.2% wt

2 Temperature * : 60-65 °

3 Reaction time : 120 min *

4 Purity of MeOH : purified crude MeOH (96.6%)

5 MeOH/oil : 6/1

Large scale biodiesel synthesis

Reactor NaOH 1% /

MeOH

NaOH 1% /

Decantation storage

Decantation storage

90 °

90 min

90 °

90 min