催化作用
异构化
生物炭
化学
核化学
纤维素
双金属片
选择性
热解
感应耦合等离子体
果糖
产量(工程)
无机化学
材料科学
有机化学
冶金
等离子体
量子力学
物理
作者
Xiheng Kang,Zhixiong You,Jian Peng,Arthur J. Ragauskas,Jinshan Pang,Peitao Zhao,Yongjun Yin,Xueping Song
出处
期刊:Biochar
[Springer Nature]
日期:2023-09-08
卷期号:5 (1)
被引量:1
标识
DOI:10.1007/s42773-023-00250-w
摘要
Abstract Highly efficient isomerization of glucose to fructose is essential for valorizing cellulose fraction of biomass to value-added chemicals. This work provided an innovative method for preparing Mg-biochar and Mg–K-biochar catalysts by impregnating either MgCl 2 alone or in combination with different K compounds (Ding et al. in Bioresour Technol 341:125835, 2021, https://doi.org/10.1016/j.biortech.2021.125835 and KHCO 3 ) on cellulose-derived biochar, followed by hydrothermal carbonization and pyrolysis. Single active substance MgO existing in the 10 Mg–C could give better catalytic effect on glucose isomerization than the synergy of MgO and KCl crystalline material present in 10 Mg–KCl–C. But the catalytic effect of 10 Mg–C was decreased when the basic site of MgO was overloaded. Compared to other carbon-based metal catalysts, 10 Mg–KHCO 3 –C with 10 wt% MgCl 2 loading had excellent catalytic performance, which gave a higher fructose yield (36.7%) and selectivity (74.54%), and catalyzed excellent glucose conversion (53.99%) at 100 °C in 30 min. Scanning electron microscope–energy dispersive spectrometer and X-Ray diffraction revealed that the distribution of Mg 2+ and K + in 10 Mg–KHCO 3 –C was uniform and the catalytic active substances (MgO, KCl and K 2 CO 3 ) were more than 10 Mg–C (only MgO). The synergy effects of MgO and K 2 CO 3 active sites enhanced the pH of reaction system and induced H 2 O ionization to form considerable OH − ions, thus easily realizing a deprotonation of glucose and effectively catalyzing the isomerization of glucose. In this study, we developed a highly efficient Mg–K-biochar bimetallic catalyst for glucose isomerization and provided an efficient method for cellulose valorization. Graphical Abstract
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