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All Journal Jurnal Rekayasa Kimia & Lingkungan
Poernomo Gunawan
School of Chemical & Biomedical Engineering, Nanyang Technological, University Singapore, Singapore
Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Journal : Jurnal Rekayasa Kimia

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Sodium Hydroxide Treatment for Cellulose Fiber Accessibility from Corncobs under Microwave Assistive Muhammad Hanif; Aknasasia Virginia Krisanti; Selvy Salfitri; Yuli Darni; Herti Utami; Edwin Azwar; Poernomo Gunawan
Jurnal Rekayasa Kimia & Lingkungan Vol 16, No 2 (2021): Jurnal Rekayasa Kimia & Lingkungan (December, 2021)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (613.163 KB) | DOI: 10.23955/rkl.v16i2.20061

Abstract

Corncob is abundantly available lignocellulosic biomass resources obtained from crops harvesting and found to be solid waste accumulation on a field. Less corncob is used as a solid fuel for cooking, and a more significant portion is vanished on the field by burning. Promisingly, corncob contains considerable cellulose as one value-added component potentially utilized as biomaterial or biofuel feedstock. However, the presence of lignin in natural lignocellulosic biomass results in recalcitrant structure and hinders cellulose accessibility. This study aimed to investigate microwave-assisted alkaline treatment to retain cellulose in the solid product while removing other impurities in corncob, especially hemicellulose and lignin. Sodium hydroxide was selected as a chemical with some variations in concentration. The chemical treatment was carried out under 400 W microwave power with various residence times and a 1:10 solid to liquor ratio. The cellulose content upgraded from 26.97% to 71.26% while reducing hemicellulose and lignin from 38.49% to 18.15% and 19.28% to 6.4%, respectively, on chemical treatment using 8% sodium hydroxide concentration for 20 minutes residence time. Scanning electron microscope (SEM) and Fourier transform infrared (FTIR) analysis also confirmed the results. The treated corncob also increased its crystallinity from 30.11% to 52.91%.
Co-Authors Aknasasia Virginia Krisanti Edwin Azwar Herti Utami Muhammad Hanif Selvy Salfitri Yuli Darni