Volume 45, Issue 5 pp. 962-970
Research Article

Extraction of Sugars and Cellulose Fibers from Cannabis Stems by Hydrolysis, Pulping, and Bleaching

Falguni Pattnaik

Falguni Pattnaik

University of Saskatchewan, Department of Chemical and Biological Engineering, S7N 5A9 Saskatoon, Saskatchewan, Canada

Indian Institute of Technology Delhi, Centre for Rural Development and Technology, 110016 New Delhi, India

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Sonil Nanda

Sonil Nanda

University of Saskatchewan, Department of Chemical and Biological Engineering, S7N 5A9 Saskatoon, Saskatchewan, Canada

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Vivek Kumar

Vivek Kumar

Indian Institute of Technology Delhi, Centre for Rural Development and Technology, 110016 New Delhi, India

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Satyanarayan Naik

Satyanarayan Naik

Indian Institute of Technology Delhi, Centre for Rural Development and Technology, 110016 New Delhi, India

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Ajay K. Dalai

Corresponding Author

Ajay K. Dalai

University of Saskatchewan, Department of Chemical and Biological Engineering, S7N 5A9 Saskatoon, Saskatchewan, Canada

Correspondence: Ajay K. Dalai ([email protected]), Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5A9, Canada.Search for more papers by this author
Mahendra K. Mohanty

Mahendra K. Mohanty

Odisha University of Agriculture and Technology, Department of Farm Machinery and Power, 751003 Bhubaneswar, Odisha, India

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First published: 28 January 2022
Citations: 3

Abstract

Cannabis indica stems were hydrolyzed with subcritical water at various temperatures, reaction times, and feed concentrations. The highest total yield of reducing sugars of 16.4 wt % was obtained at 190 °C in 37.5 min with a feed concentration of 3.5 wt %. Solid residues from the optimized process were treated with 0.5 M NaOH (pulping) and 0.5–3 % H2O2 (bleaching) to isolate cellulose fibers. The maximum yield of cellulose was 34.8 wt % with lowest lignin content of 0.5 wt %. With the removal of hemicellulose and lignin through the integrated hydrothermal processes, the crystallinity index and thermal stability of the cellulose fibers increased.

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