Engineering the porosity and acidity of H-Beta zeolite by dealumination for the production of 2-ethylanthraquinone via 2-(4 '-ethylbenzoyl)benzoic acid dehydration

doi:10.1039/c7ra13576a

	Engineering the porosity and acidity of H-Beta zeolite by dealumination for the production of 2-ethylanthraquinone via 2-(4 '-ethylbenzoyl)benzoic acid dehydration
	He, N.1; Liu, J. X.1; Liu, C. Y.1; Wang, G. R.1; Xin, Q.2; Guo, H. C.1
刊名	RSC ADVANCES
	2018
卷号	8 期号:18 页码:9731-9740
ISSN号	2046-2069
DOI	10.1039/c7ra13576a
文献子类	Article
英文摘要	Environmentally-friendly zeolites have been used commercially to replace concentrated sulfuric acid and oleum in the alkylation reactions and dehydration of alcohols. However, moderate activity, associated with access and diffusion limitations, low intramolecular dehydration selectivity, associated with unsatisfactory acidity, and unknown reusability have hampered their industrial implementation in the dehydration of bulky 2-(4'-ethylbenzoyl) benzoic acid (E-BBA) to 2-ethylanthraquinone (2-EAQ). Herein, we have discovered that after being treated with mild HNO3, nano-sized H-Beta zeolite showed outstanding catalytic activity, selectivity and reusability, compared with a commercial oleum catalyst. A number of techniques, such as XRD, XPS, XRF, Si-29 MAS NMR, Al-27 MQ MAS NMR, FTIR, NH3-TPD, argon physisorption and HR-TEM, have been employed to decouple the interdependence between acidity, porosity and catalytic performance. It was found that mild HNO3 treatment could clean out the extra-framework aluminium deposits and selectively extract the aluminium species on the outer surface of Beta zeolites, which strengthened the acidity of the Bronsted acid sites (Si(OH)Al) inside the H-Beta micropores, thus increasing the possibility of intramolecular dehydration of E-BBA. Moreover, this mild HNO3 treatment also dredged the network of intercrystalline mesopores, alleviating the diffusion constraints. Therefore, through the dual adjustment of acidity and porosity, dealuminated H-Beta zeolite has a promising future in the green synthesis of 2-EAQ.
WOS关键词	AL-27 MAS NMR ; BEA ; FTIR ; XRD
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000430451800017
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/169010]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Guo, H. C.
作者单位	1.Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	He, N.,Liu, J. X.,Liu, C. Y.,et al. Engineering the porosity and acidity of H-Beta zeolite by dealumination for the production of 2-ethylanthraquinone via 2-(4 '-ethylbenzoyl)benzoic acid dehydration[J]. RSC ADVANCES,2018,8(18):9731-9740.
APA	He, N.,Liu, J. X.,Liu, C. Y.,Wang, G. R.,Xin, Q.,&Guo, H. C..(2018).Engineering the porosity and acidity of H-Beta zeolite by dealumination for the production of 2-ethylanthraquinone via 2-(4 '-ethylbenzoyl)benzoic acid dehydration.RSC ADVANCES,8(18),9731-9740.
MLA	He, N.,et al."Engineering the porosity and acidity of H-Beta zeolite by dealumination for the production of 2-ethylanthraquinone via 2-(4 '-ethylbenzoyl)benzoic acid dehydration".RSC ADVANCES 8.18(2018):9731-9740.