Study on Liquefaction of Corncob in Polyhydric Alcohols

Abstract

The liquefaction of corncob in polyhydric alcohols was investigated by using sulfuric acid as a catalyst. Results showed that the best liquefaction could be obtained with residue percent of 4.5% under the conditions with the corncob/polyhydric alcohols mass ratio of 1/5, reaction temperature of 150°C, reaction time of 60 min, catalyst amount of 3% (based on the weight of corncob), PEG 400/glycerin mass ratio of 7/3 in the polyhydric alcohols, respectively. The liquefied liquid products had acid number of 18.9 mg KOH/g and hydroxyl number of 616.3mg KOH/g, respectively.

Enhancing Liquefaction Efficiency: Exploring the Impact of Pre-Hydrolysis on Hazelnut Shell (Corylus avellana L.)

“…Using acid-catalyzed liquefaction, lignocellulosic materials can be almost totally converted [ 18 ]. Several works have reported acid-catalyzed liquefaction of different lignocellulosic materials, like, for example, agricultural wastes such as wheat straw [ 19 ] or cornstarch [ 20 ], forest management residues [ 21 ], barks [ 22 ], or shells [ 23 ] to be later used mainly for the production of polyurethane foams [ 24 ] and adhesives [ 25 ].…”

Chemical Composition and Optimization of Liquefaction Parameters of Cytisus scoparius (Broom)

“…On the other hand, phenol is more toxic than the polyalcohols used and less green since most of the polyalcohols can be obtained from crude glycerol or other non-petroleum materials. Several lignocellulosic materials have been liquefied with polyalcohols such as agricultural wastes, for example, wheat straw [20], cornstarch [21] or rice straw, oilseed rape straw and corn stover [22], forest management residues, such as several woods [15,23,24], barks [16,25,26] or shells [14,27,28] and also some industrial residues such as orange peel [29]. The lignocellulosic material is composed of carbohydrate polymers (cellulose and hemicelluloses), lignin and a small part of other compounds (extractives, salts and minerals).…”