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Creating hierarchies promptly: Microwave-accelerated synthesis of ZSM-5 zeolites on macrocellular silicon carbide (SiC) foams
Ou, Xiaoxia; Xu, Shaojun; Warnett, Jason M.; Holmes, Stuart M.; Zaheer, Amber; Garforth, Arthur A.; Williams, Mark A.; Jiao, Yilai; Fan, Xiaolei; Fan, XL (reprint author), Univ Manchester, Sch Chem Engn & Analyt Sci, Oxford Rd, Manchester, Lancs, England.; Jiao, YL (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
2017-03-15
发表期刊CHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
卷号312页码:1-9
摘要Hierarchical ZSM-5 coatings supported on macrocellular beta-sic foams were prepared by a microwave accelerated secondary growth method. Under microwave irradiation, differential heating was enabled due to the high microwave-adsorbing ability of SiC leading to the fast assembly of ZSM-5 zeolites on the SiC foams. The effects of crystallisation temperature, time and agitation on the growth of ZSM-5 zeolites on SiC foams were also investigated under microwave heating. A specific surface area of ca. 52 m(2) g(-1) was obtained under the optimum condition of 150 degrees C and 4 h. Comparative studies of conventional hydrothermal and microwave-accelerated synthesis were conducted and the resulting materials were characterised extensively using XRD, SEM and N-2 adsorption. The combination of microwave heating, high microwave absorption of SiC substrates and agitation allowed a much more focused heating across the surface of SiC foams than conventional heating, which suppressed the formation of ZSM-5 crystals in the liquid phase and the consequent sedimentation. Additionally, for the first time, mesoscopic features of ZSM-5 coatings on SiC foam composites (>10 pm) were studied in 3D by X-ray micro computed tomography (mu-CT), providing quantitative information on the quality of the ZSM-5 coating such as the global thickness and distribution of ZSM-5 across the SiC foam supports. It was concluded that microwave-accelerated secondary growth synthesis offered an efficient route to give high quality coatings on structured foams with the good crystal quality and uniform thickness as well as lower energy consumption, especially for the substrate with a high loss tangent. (C) 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.; Hierarchical ZSM-5 coatings supported on macrocellular beta-sic foams were prepared by a microwave accelerated secondary growth method. Under microwave irradiation, differential heating was enabled due to the high microwave-adsorbing ability of SiC leading to the fast assembly of ZSM-5 zeolites on the SiC foams. The effects of crystallisation temperature, time and agitation on the growth of ZSM-5 zeolites on SiC foams were also investigated under microwave heating. A specific surface area of ca. 52 m(2) g(-1) was obtained under the optimum condition of 150 degrees C and 4 h. Comparative studies of conventional hydrothermal and microwave-accelerated synthesis were conducted and the resulting materials were characterised extensively using XRD, SEM and N-2 adsorption. The combination of microwave heating, high microwave absorption of SiC substrates and agitation allowed a much more focused heating across the surface of SiC foams than conventional heating, which suppressed the formation of ZSM-5 crystals in the liquid phase and the consequent sedimentation. Additionally, for the first time, mesoscopic features of ZSM-5 coatings on SiC foam composites (>10 pm) were studied in 3D by X-ray micro computed tomography (mu-CT), providing quantitative information on the quality of the ZSM-5 coating such as the global thickness and distribution of ZSM-5 across the SiC foam supports. It was concluded that microwave-accelerated secondary growth synthesis offered an efficient route to give high quality coatings on structured foams with the good crystal quality and uniform thickness as well as lower energy consumption, especially for the substrate with a high loss tangent. (C) 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.
部门归属[ou, xiaoxia ; xu, shaojun ; holmes, stuart m. ; zaheer, amber ; garforth, arthur a. ; fan, xiaolei] univ manchester, sch chem engn & analyt sci, oxford rd, manchester, lancs, england ; [warnett, jason m. ; williams, mark a.] univ warwick, wmg, prod evaluat technol grp, coventry cv4 7al, w midlands, england ; [jiao, yilai] chinese acad sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china
关键词Microwave-accelerated Synthesis Secondary Growth Synthesis Zsm-5 Sic Foam Differential Heating X-ray Micro Computed Tomography (Mu-ct)
学科领域Engineering, Environmental ; Engineering, Chemical
资助者University of Manchester through Higher Education Innovation Funded 'Knowledge and Innovation Hub for Environmental Sustainability'; China Scholarship Council (CSC) - China [201604910181]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/78235
专题中国科学院金属研究所
通讯作者Fan, XL (reprint author), Univ Manchester, Sch Chem Engn & Analyt Sci, Oxford Rd, Manchester, Lancs, England.; Jiao, YL (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
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Ou, Xiaoxia,Xu, Shaojun,Warnett, Jason M.,et al. Creating hierarchies promptly: Microwave-accelerated synthesis of ZSM-5 zeolites on macrocellular silicon carbide (SiC) foams[J]. CHEMICAL ENGINEERING JOURNAL,2017,312:1-9.
APA Ou, Xiaoxia.,Xu, Shaojun.,Warnett, Jason M..,Holmes, Stuart M..,Zaheer, Amber.,...&Jiao, YL .(2017).Creating hierarchies promptly: Microwave-accelerated synthesis of ZSM-5 zeolites on macrocellular silicon carbide (SiC) foams.CHEMICAL ENGINEERING JOURNAL,312,1-9.
MLA Ou, Xiaoxia,et al."Creating hierarchies promptly: Microwave-accelerated synthesis of ZSM-5 zeolites on macrocellular silicon carbide (SiC) foams".CHEMICAL ENGINEERING JOURNAL 312(2017):1-9.
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