林业工程学报2018，Vol.3Issue(4)：81-86,6.DOI:10.13360/j.issn.2096-1359.2018.04.014
油茶壳原料制备木糖和高品质活性炭的研究
Preparation of activated carbon and xylose using Camellia oleifera shell as a feedstock
摘要
Abstract
Camellia oleifera shell is a by-product and waste from agriculture and forestry industry. It has abundant re-serves on earth and is still unexploited for its high value-added utilization. C. oleifera shell contains high amount of hemicellulose, which can be used as potential raw materials for the preparation of xylose. In this work, dilute sulfu-ric acid ( H2SO4) was employed as the catalyst to directly hydrolyze C. oleifera shell raw materials. The effects of acid concentration, reaction temperature and reaction time on the final yield of xylose were investigated through or-thogonal experiment design. The results showed that the highest yield of xylose of 98.2% was achieved when using 1.0% H2SO4 as the catalyst under 80℃ for 2.0 h. The H2SO4 not only hydrolyzed the C. oleifera shell but also re-moved the ash from the C. oleifera shell material at the same time by pickling. The solid residue which generated from the hydrolysis procedure under the optimal condition were used as the raw material to prepare the low-ash con-tent activated carbon by activation with phosphoric acid. It was found that the iodine number and the methylene blue adsorption of the activated carbon prepared from the solid residue with acid hydrolysis treatment were 937.9 mg/g and 145.5 mg/g, respectively, while the iodine number and the methylene blue of the activated carbon prepared from the raw materials without acid hydrolysis were 881.5 mg/g and 121.5 mg/g, respectively. When it came to the ash content, the activated carbon prepared from the hydrolyzed solid residue was only 0.6%, compared with the ac-tivated carbon prepared from the raw materials without acid hydrolysis which could be up to 2.40%. The FT-IR and XRD were used to analyze the hydrolyzed solid residue. The results showed that the catalytic hydrolysis of C. oleif-era shell by H2SO4was mainly to hydrolyze the hemicellulose and did not hydrolyze or destroy the cellulose and lig-nin structure.关键词
油茶壳/稀硫酸/木糖/活性炭Key words
Camellia oleifera shell/dilute sulfuric acid/xylose/activated carbon分类
化学化工引用本文复制引用
章磊,安佳欢,徐思泉,胡红,夏海岸,左宋林..油茶壳原料制备木糖和高品质活性炭的研究[J].林业工程学报,2018,3(4):81-86,6.基金项目
国家重点研发计划(2017YFD0601006) （2017YFD0601006）
江苏省自然科学基金(BK20171452). （BK20171452）
