Abstract: This study evaluates the yield and purity of second generation bioethanol from chemical hydrolysis of cellulosic content of biomass (sugarcane bagasse),at ambient temperature and atmospheric pressure, and the effect of yeast concentration on its subsequent fermentation to ethanol, it is important to evaluate the purity of bioethanol because it is required to determine the property of bioethanol that would be used as fuel in the transportation sector while the yield is evaluated to determine the quantity of bioethanol produced. The method used involves chemical hydrolysis of sugarcane bagasse, with varying acid molarities of 1M, 2M, 3M, and 4M. The product, which consists mainly of simple sugars like glucose, xylose was subsequently fermented with varied concentrations of yeast of 5g/250ml, 4g/250ml, 3g/250ml and 2g/250ml in order to obtain ethanol. The result obtained shows that there is a gradual increase in the ethanol yield with increasing acid molarity from 1M until a critical optimum point is obtained at a high acid concentration of 3M. Beyond the molarity of 3M up to the 4M limit, there exists a decline in the ethanol yield, from the optimum point. The evaluation of the concentration of yeast on the fermentation of hydrolyzed cellulosic contents shows that the optimum ethanol yield is obtained at a yeast concentration of 3.0g/250ml for all the varying acid concentrations. A combination of acid concentration of 3M and yeast concentration of 3g/250ml therefore gives the optimum conditions, at moderate temperature and pressure, for the chemical hydrolysis of bagasse’s lignocellulosic content and the fermentation of the resulting product. On purity determination, sample”C” has shown the highest purity of 95% making it to be used as fuel additives or fuel itself.
Keywords: chemical hydrolysis, generation bioethanol, chemical hydrolysis.
Title: CHEMICAL HYDROLYSIS OF CELLULOSIC BIOMASS FOR THE PRODUCTION OF SECOND GENERATION BIOETHANOL
Author: PACOTO LIVINGSTONE, DR.WILLIAMS WANASOLO
International Journal of Thesis Projects and Dissertations (IJTPD)
Vol. 11, Issue 2, April 2023 - June 2023
Page No: 1-11
Research Publish Journals
Website: www.researchpublish.com
Published date: 01-April-2023
