Improvement of vapor-phase silylation and thermal stability of silylated MCM-22 zeolite
文献类型：期刊论文
| 作者 | Gao, Ningning1,2; Xie, Sujuan1; Liu, Shenglin1; Li, Xiujie1; Xu, Longya1 |
| 刊名 | journal of porous materials
 |
| 出版日期 | 2013-10-01 |
| 卷号 | 20期号:5页码:1217-1224 |
| 关键词 | MWW Vapor-phase silylation Thermal stability Pillaring structure |
| 英文摘要 | the method of vapor-phase silylation over as-made mcm-22 was improved through the replacement of deionized water with naoh solution that absorbed hcl produced during the vapor-phase silylation. also, the thermal stability of silylated mcm-22 was investigated by x-ray diffraction, n-2 adsorption-desorption, pyridine adsorption and desorption followed by infrared measurement and nuclear magnetic resonance techniques. the results showed that this improvement was beneficial for dichlorodimethylsilane molecules to enter the interlayer of mcm-22 zeolite to form pillaring structure. both the interlayer pillaring structure and acidity of silylated mcm-22 varied with increasing thermal treatment temperature from 600 to 750 a degrees c. specifically, the interlayer pillaring si groups were thermally stable below 650 a degrees c, and damaged gradually with the increase of thermal treatment temperature from 650 to 750 a degrees c, leading to gradual decrease of the specific surface area and volume corresponding to interlayer supercages. at 750 a degrees c, the interlayer pillaring structure was destroyed completely, whereas the mww structure was still maintained well. as to the variations of acid sites with thermal treatment temperature, different trend was observed. the amount of weak and strong bronsted acid sites, as well as that of strong lewis acid sites decreased gradually with increasing thermal treatment temperature to 650 a degrees c, but remained almost unchanged when the temperature was further increased to 750 a degrees c. |
| WOS标题词 | science & technology ; physical sciences ; technology |
| 类目[WOS] | chemistry, applied ; chemistry, physical ; materials science, multidisciplinary |
| 研究领域[WOS] | chemistry ; materials science |
| 关键词[WOS] | pillared molecular-sieve ; m-xylene transformation ; si-29 mas-nmr ; toluene disproportionation ; h-mcm-22 zeolite ; pore systems ; p-xylene ; catalytic-properties ; delaminated zeolite ; acid properties |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000324103300027 |
| 公开日期 | 2015-11-10 |
| 源URL | [http://159.226.238.44/handle/321008/137840]  |
| 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 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, Ningning,Xie, Sujuan,Liu, Shenglin,et al. Improvement of vapor-phase silylation and thermal stability of silylated MCM-22 zeolite[J]. journal of porous materials,2013,20(5):1217-1224. |
| APA | Gao, Ningning,Xie, Sujuan,Liu, Shenglin,Li, Xiujie,&Xu, Longya.(2013).Improvement of vapor-phase silylation and thermal stability of silylated MCM-22 zeolite.journal of porous materials,20(5),1217-1224. |
| MLA | Gao, Ningning,et al."Improvement of vapor-phase silylation and thermal stability of silylated MCM-22 zeolite".journal of porous materials 20.5(2013):1217-1224. |
入库方式： OAI收割
来源：大连化学物理研究所
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