摘要
以竹屑为研究对象,采用多种固体酸催化生物质液化,研究不同酸强度、酸量以及酸类别固体酸对竹屑的液化率和组分含量的影响。利用氨程序升温脱附法(NH_(3)-TPD)和吡啶红外光谱(Py-IR)分析固体酸的酸强度、酸量和酸类别。研究结果表明:固体酸对应的强酸位点量越多,竹屑液化率越高;当固体酸催化竹屑液化时,木质素和半纤维素首先开始液化,固体残渣中纤维素含量增加;当以最多强酸位点固体磷酸(SPA)(1.21 mmol·g^(−1))催化竹屑液化时,竹屑的液化率达到62.0%,液化后剩余生物质残渣中的葡聚糖含量高达到83.38%。
Taking bamboo sawdust as the raw material,various solid acids were used to catalyze the biomass liquefaction,and the effects of different acid strength,acid amounts and acid types on the liquefaction rates and component contents of bamboo sawdust were studied.The acid strength,acid amounts and the surface acid properties of the solid acid were analyzed by ammonia temperature program desorption method(NH_(3)-TPD)and pyridine infrared spectroscopy(Py-IR).The results showed that the more strong acid sites corresponding to the solid acid,the higher liquefaction rate of bamboo sawdust.When the solid acid was used to catalyze the liquefaction of bamboo sawdust,lignin and hemicellulose began to liquefy at first,and the cellulose content in the solid residue increased.When the liquefaction of bamboo sawdust was catalyzed with solid phosphoric acid(SPA)with the most strong acid sites(1.21 mmol·g^(−1)),,the liquefaction rate of bamboo sawdust could reach 62.0%,and the glucan content in the residue after liquefaction could reach 83.38%.
作者
陈远航
冉淼
黄伊嘉
唐宏伟
吴斌
CHEN Yuanhang;RAN Miao;HUANG Yijia;TANG Hongwei;WU Bin(Sichuan Academy of Forestry,Chengdu 61008,China;Technology Center of Zhejiang Shanying Paper Co.,Ltd.,Jiaxing 314000,China)
出处
《四川林业科技》
2021年第6期120-125,共6页
Journal of Sichuan Forestry Science and Technology
基金
四川省财政专项竹材剩余物制备可降解育苗容器(2021CZZX19)。
关键词
竹屑
固体酸
液化率
Bamboo sawdust
Solid acid
Liquefaction rate
