Parametric optimization of delignification of rice straw through central composite design approach towards application in grafting

Journal of Advanced Research
Aparna MukherjeeGopinath Halder

Abstract

The present investigation deals with process optimisation of delignification of rice straw towards its micro-porous structural enhancement for its utilization in polymer grafting. The individual effect of influential parameters viz. sodium hydroxide concentration (1-12%, w/v), reaction time (30-126 min), and temperature (20-150 °C) on delignification were studied in a single mode batch process. The process parameters were further optimized with Central composite design (CCD) approach of response surface methodology in Design expert software. Delignification of rice straws was observed to follow quadratic equation. Analysis of variance (ANOVA) study suggested the equation to be significant for the process with major impact of sodium hydroxide concentration on the delignification process than reaction time and temperature. The optimized parametric conditions of delignification are: alkali concentration 7.59%, reaction time 75.11 min, and reaction temperature 40 °C. The software predicted lignin extraction concentration to be 72.4 mg/g, which upon experimentation was found to be 70.03 mg/g. Instrumental analysis of the delignified rice straw demonstrated porous structure and change in surface chemistry due to lignin removal. There...Continue Reading

Citations

Feb 25, 2021·Environmental Science and Pollution Research International·Sudeshna BhattacharjyaAshok K Patra
Dec 24, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Irnia NurikaGuy C Barker

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Methods Mentioned

BETA
chemical treatments
X-ray
infrared spectroscopy

Software Mentioned

Response Surface Methodology
Design Expert

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