Hydrothermal carbonization of cola nut shell: Impact of deep eutectic pretreatment on the property of hydrochar

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING Industrial Crops and Products Pub Date : 2025-03-07 DOI:10.1016/j.indcrop.2025.120792

Félix Mérimé Bkangmo Kontchouo , Hao Xu , Marie Ganmo Koutchouo , Kuan Ding , Chayanoot Kositanont , Chotiros Dokkhan , Thipjak Na Lampang , Chanchana Thanachayanont , Xun Hu , Chaoyang Xu , Shu Zhang

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Abstract

Hydrothermal carbonization of lignocellulosic biomass results in hydrochar with abundant surface functionality and low degree of carbonization. In this work, Cola Shell was subjected to a pretreatment with the Deep Eutectic Solvent (DES) prior to hydrothermal carbonization under different conditions (210 ºC and 260 ºC). The aim was to ascertain the impact of pretreatment with DES on the properties of hydrochars. The results show that pretreatment with DES at 110 ºC favors the disintegration of hemicellulose while promoting the cellulose hydrolysis and dehydration. The lignin removal formed a snow cloud of particles on hydrochar surface, which further undergoes polymerization at a high HTC temperature to form a cluster of fibrous carbonaceous material, contributing to increase the degree of carbonization and thermal stability of hydrochar. DES pretreatment also reduced structural defects while increasing the cellulose crystallinity. In addition, DES pretreatment increased the nitrogen content and energy yield without affecting the calorific value of hydrochar-derived Cola Nut Shell.

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来源期刊

Industrial Crops and Products 农林科学-农业工程

CiteScore

9.50

自引率

8.50%

发文量

1518

审稿时长

43 days

期刊介绍： Industrial Crops and Products is an International Journal publishing academic and industrial research on industrial (defined as non-food/non-feed) crops and products. Papers concern both crop-oriented and bio-based materials from crops-oriented research, and should be of interest to an international audience, hypothesis driven, and where comparisons are made statistics performed.