Insights into deactivation mechanism of sulfonated carbonaceous solid acids probed by cellulose hydrolysis

doi:10.1016/j.cattod.2018.03.069

	Insights into deactivation mechanism of sulfonated carbonaceous solid acids probed by cellulose hydrolysis
	Chen, Gongzhe 1,3; Wang, Xicheng 1; Jiang, Yijun 1; Mu, Xindong 1; Liu, Haichao 2
刊名	CATALYSIS TODAY
	2019
卷号	319 页码:25-30
关键词	Cellulose hydrolysis Sulfonated carbonaceous solid acids SO3H sites leaching Deactivation mechanism
ISSN号	0920-5861
DOI	10.1016/j.cattod.2018.03.069
英文摘要	Sulfonated carbonaceous solid acids are key heterogeneous catalysts and are widely used in acid-catalyzed reactions, especially in biomass transformation. In this work, the sulfonated carbonaceous solid acids were prepared and their stability was examined in cellulose hydrolysis at 170 degrees C. Their activity decreased largely after the hydrothermal treatment at 170 degrees C, as a result of the leaching of their SO3H species. Characterizations of the filtrates after the hydrothermal treatment of these solid acid catalysts by NMR and laser scattering demonstrated that the leaching of SO3H sites was not caused by the cleavage of C-S bonds, but by the exfoliation of colloidal carbon particles with SO3H sites from the catalysts. Such leaching problem led to significant decrease in SO3H density for the carbon-based solid acids that synthesized by traditional sulfonation methods because of their uneven distribution of SO3H sites. To address this issue, carbon precursors with more free C-H sites were applied to regulate the distribution of SO3H sites. As a consequence, the evenly distributed SO3H sites resulted in less change in acid density after the hydrothermal treatment, and maintenance of high SO3H density. This study could provide new guidance to further design of water-tolerant solid acid catalysts, and would promote the development of energetically efficient processes to convert cellulose.
资助项目	National Natural Science Foundation of China[21706270] ; National Natural Science Foundation of China[21433001]
WOS关键词	IONIC LIQUID ; FATTY-ACIDS ; AMORPHOUS-CARBON ; ACTIVATED CARBON ; CATALYSTS ; GLUCOSE ; ESTERIFICATION ; CARBONIZATION ; BIOMASS ; SO3H
WOS研究方向	Chemistry ; Engineering
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000447156200004
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn/handle/337004/11757]
专题	中国科学院青岛生物能源与过程研究所
通讯作者	Mu, Xindong; Liu, Haichao
作者单位	1.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biobased Mat, Qingdao 266101, Peoples R China 2.Peking Univ, Beijing Natl Lab Mol Sci, Coll Chem & Mol Engn, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100871, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Chen, Gongzhe,Wang, Xicheng,Jiang, Yijun,et al. Insights into deactivation mechanism of sulfonated carbonaceous solid acids probed by cellulose hydrolysis[J]. CATALYSIS TODAY,2019,319:25-30.
APA	Chen, Gongzhe,Wang, Xicheng,Jiang, Yijun,Mu, Xindong,&Liu, Haichao.(2019).Insights into deactivation mechanism of sulfonated carbonaceous solid acids probed by cellulose hydrolysis.CATALYSIS TODAY,319,25-30.
MLA	Chen, Gongzhe,et al."Insights into deactivation mechanism of sulfonated carbonaceous solid acids probed by cellulose hydrolysis".CATALYSIS TODAY 319(2019):25-30.