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Utilization of agricultural cellulose wastes

Abstract

Wastes, example, straw, are prehydrolyzed to convert pentosanes, starches, and hemicelluloses to monosaccharides; the remaining pulp is 50% cellulose. Thus, dry wheat straw 0.8 kg was treated with 10 L of 0.3% aqueous HCl at 5-5.5 atm and 145/sup 0/ and a space velocity of 0.55 L/min, washed with dry steam, followed by water at 120 to 130/sup 0/, and more dry steam, and compressed at 25 kg/cm/sup 2/ to yield a product containing 45 to 50 wt % water. The sugar solution obtained (1394 L) contained 1.34 wt % reducing sugars, a straw hydrolysis of 23 wt %, and comprised xylose 74.3, mannose 5.2, arabinose 11.8, glucose 5.9, galactose 2.9%, and furfural 0.16 g/L. The cellulose residue had a dry weight of 0.545 kg. a yield of 68.2 wt % and contained cellulose 53.1, hemicelluloses 12.6%, lignin 22.1, ash and extractables 12.2%. The degree of polymerization was 805 glucose units.
Publication Date:
May 05, 1977
Product Type:
Patent
Report Number:
DE 2647910
Reference Number:
EDB-81-038032
Resource Relation:
Patent Priority Date: Priority date 24 Oct 1975, Greece
Subject:
09 BIOMASS FUELS; AGRICULTURAL WASTES; ACID HYDROLYSIS; CELLULOSE; STRAW; ARABINOSE; BIOCHEMICAL REACTION KINETICS; FURFURAL; GLUCOSE; MANNOSE; MONOSACCHARIDES; SACCHAROSE; STARCH; WATER; XYLOSE; ALDEHYDES; CARBOHYDRATES; CHEMICAL REACTIONS; DECOMPOSITION; DISACCHARIDES; FURANS; HETEROCYCLIC COMPOUNDS; HEXOSES; HYDROGEN COMPOUNDS; HYDROLYSIS; KINETICS; LYSIS; OLIGOSACCHARIDES; ORGANIC COMPOUNDS; ORGANIC OXYGEN COMPOUNDS; ORGANIC WASTES; OXYGEN COMPOUNDS; PENTOSES; POLYSACCHARIDES; REACTION KINETICS; REAGENTS; SACCHARIDES; SOLVOLYSIS; WASTES; 140504* - Solar Energy Conversion- Biomass Production & Conversion- (-1989)
OSTI ID:
6625141
Country of Origin:
Germany
Language:
English
Submitting Site:
TIC
Size:
Pages: 39
Announcement Date:
May 13, 2001

Citation Formats

Valkanas, G N, Economidis, D G, Koukios, E G, and Valkanas, C G. Utilization of agricultural cellulose wastes. Germany: N. p., 1977. Web.
Valkanas, G N, Economidis, D G, Koukios, E G, & Valkanas, C G. Utilization of agricultural cellulose wastes. Germany.
Valkanas, G N, Economidis, D G, Koukios, E G, and Valkanas, C G. 1977. "Utilization of agricultural cellulose wastes." Germany.
@misc{etde_6625141,
title = {Utilization of agricultural cellulose wastes}
author = {Valkanas, G N, Economidis, D G, Koukios, E G, and Valkanas, C G}
abstractNote = {Wastes, example, straw, are prehydrolyzed to convert pentosanes, starches, and hemicelluloses to monosaccharides; the remaining pulp is 50% cellulose. Thus, dry wheat straw 0.8 kg was treated with 10 L of 0.3% aqueous HCl at 5-5.5 atm and 145/sup 0/ and a space velocity of 0.55 L/min, washed with dry steam, followed by water at 120 to 130/sup 0/, and more dry steam, and compressed at 25 kg/cm/sup 2/ to yield a product containing 45 to 50 wt % water. The sugar solution obtained (1394 L) contained 1.34 wt % reducing sugars, a straw hydrolysis of 23 wt %, and comprised xylose 74.3, mannose 5.2, arabinose 11.8, glucose 5.9, galactose 2.9%, and furfural 0.16 g/L. The cellulose residue had a dry weight of 0.545 kg. a yield of 68.2 wt % and contained cellulose 53.1, hemicelluloses 12.6%, lignin 22.1, ash and extractables 12.2%. The degree of polymerization was 805 glucose units.}
place = {Germany}
year = {1977}
month = {May}
}