Parametric study on dilute sulphuric acid pretreatment of Job's tears (Coix lacryma-jobi)

Nika C. Que

Date

4-2013

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Butch G. Bataller

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

The potential of Job's tears as a new feedstock of bioethanol was explored in this study.Job's tears stalk which are left in fields and considered as agricultural wastes are the raw materials for this study. dilute acid pretreatment is employed in the study because of its effectiveness and low cost. The factors varied in two levels for the experiment were H₂SO₄ concentration, temperature and reaction time. The response variables were solid recovery and alpha cellulose recovery that were measured from the pretreated solid residue. 2ᴷ factorial with three way analysis of variance was used in this study to evaluate the data gathered. At 95% confidence level, effects of H₂SO₄ concentration, temperature, reaction time were considered insignificant to the solid recovery. On the other hand, the same factors were considered for alpha cellulose recovery and were found to be significant. Decreasing the main factors will increase alpha cellulose recovery. However, interaction effects among factors have different trends. Among the significant effects, temperature was the most influential. At the end of this study, amount of ethanol was predicted theoretically from recovery of alpha cellulose obtained.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2013 E62 /Q46

Document Type

Thesis

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