Study on cellulose increasing methods for in pineapple waste (Ananas comosus (L.) Merr.)
Abstract
In order to get high efficiency of ethanol conversion, the sample requires high cellulose content and less lignin. Therefore, pretreatment is necessary to remove lignin. In this study, pretreatment of pineapple waste studies parameters which affects cellulose recovery and lignin removal by NaOH and H2SO4 including: chemical concentration (0,5-7%), time (20-60 minutes) and reaction temperature (30-100oC). The results show that the optimal conditions of the process are 2% of H2SO4, 30 minutes and temperature of 30oC. Under these conditions, 38% of lignin is removed and the cellulose enrichment efficiency is 97,4%. The impact of pretreatment on the composition and structure of samples is analyzed by DNS, TGA, FTIR and SEM.
Moraref