Parametric and local optimization studies on the two-stage high temperature acid hydrolysis on napier grass (Pennisetum purpureum) for xylose production

Date

2012

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

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 production of xylose from napier grass (Pennisetum purpureum) was done using two-stage acid hydrolysis. Parametric and local optimization studies were carried out using a Two-Level Factorial Design. The three parameters that were considered in the experiment were acid concentration (2%, 6% v/v H2SO4), temperature (104.44, 126.67ºC and reaction time (15, 60 minutes). Using the Analysis of variance (ANOVA), the significant terms were C (reaction time),BC (temperature-reaction time interaction) and ABC (acid concentration- temperature-reaction time interaction). The reduce form of the regression model is y=+0.87-0.24C-018BC+0.34ABC From the values of the effects, xylose yield decreases for longer reaction times. The temperature-reaction time interaction also has negative effect on xylose yield. However, acid concentration-temperature-reaction time interaction has positive effect on xylose yield. Since the statistical model is also significant, the optimum conditions for the experiment could be determined using the model. The obtained optimum conditions for xylose production for this study was 2% v/v H₂SO₄ 118.44ºC temperature and 15-minute reaction time, and the maximum xylose yield is 1.505%.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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