Parametric study on the production of biodiesel via base-catalyzed transesterification of waste cooking oil in a stirred tank batch reactor

Date

6-2015

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Rex B. Demafelis

Restrictions

Restricted: Not available to the general public. Access is available only after consultation with author/thesis adviser and only to those bound by the confidentiality agreement.

Abstract

A parametric study on the production of biodiesel from waste cooking oil was conducted. The applicability of lad-scale optimum conditions of 47ºC, 6.51:0171:1 methanol-to-sodium hydroxide-to-oil molar ratio and 30 minutes reaction time was tested on a stirred-tank batch reactor with a 10-L working volume. Significant errors were found both on the purity and yield of the product suggesting that a parametric study was indeed necessary. A 2ᵏ factorial experiment design was performed to determine the effect of temperature, methanol-to-oil ratio and catalyst loading on the purity and yield of the biodiesel produced. It was found out that the three factors affected the purity of the biodiesel. The effect of the three mentioned factors was also studied on the biodiesel yield. Analysis of variance revealed that only the catalyst loading had an impact on the yield. At 60ºC , 12:1 methanol-oil ratio and 0.235 moI/moI catalyst loading, the product of the 30-minute reaction was 97.92% methyl ester purity and a volumetric yield of 72.91%. A time profile under the same conditions was performed to determine the time it would take the methyl ester content to reach the PNS standard on biodiesel purity. It was recommended that the transesterification must be done for at least 25 minutes at the optimum conditions in order to achieve the required purity.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

LG 993.5 2015 E62 /C65

Document Type

Thesis

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