Synthesis of AEI/CHA intergrowth zeolites by dual templates and their catalytic performance for dimethyl ether to olefins | |
Department | 青岛研发中心/青岛市资源化学与新材料研究中心 |
Zhao, Dongpu1; Zhang, Yan1; Li, Zhuo1; Wang, Yan2; Yu JQ(于健强)1,2; Yu JQ(于健强) | |
2017 | |
Source Publication | Chemical Engineering Journal
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ISSN | 1385-8947 |
Volume | 323Pages:295-303 |
Abstract | A series of SAPO molecular sieves were hydrothermally synthesized by employing mixture template of diethylamine (DEA) and N,N’-diisopropylethylamine (DIEA). The influences of template composition and crystallization time were investigated systematically. The results revealed that the crystalline products switched from SAPO-34/5 to SAPO-18/34 and finally to SAPO-18, the crystal size and acidity decreased with the increasing of DIEA ratio in the mixed template. Furthermore, crystallization time was also found to play a significant role in the particulate properties of the zeolites, the metastable AEI phase converted into more stable CHA phase, the Si content and acidity increased with the prolonged crystallization time. Dimethyl ether (DME) to olefins (DTO) reactions showed that the extending of the crystallization time was against the formation of light olefins, but favorable for the formation of light alkanes, due to the increase in CHA/AEI ratio, particle size and acidity may increase the probability of unfavorable hydrogenation of the target light olefins. |
Keyword | Aei/cha Intergrowth Mixed Templates Crystallization Time Dimethyl Ether To Olefins (dTo) |
Subject Area | 材料科学与物理化学 |
DOI | 10.1016/j.cej.2017.04.109 |
Funding Organization | Shandong science and technology development program (No. 2011GGB01044);China Postdoctoral Science Foundation (No. 2014M551869);Shandong Excellent Young Scientist Research Award Fund (No. BS2015CL002);the National Natural Science Foundation of China (No. 21503243) |
Indexed By | SCI |
If | 6.216 |
Language | 英语 |
compositor | 第二作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/21965 |
Collection | 青岛研发中心/青岛市资源化学与新材料研究中心 |
Corresponding Author | Zhang, Yan; Yu JQ(于健强) |
Affiliation | 1.Qingdao Univ, Sch Chem & Chem Engn, Collaborat Innovat Ctr Marine Biomass Fiber Mat &, 308 Ningxia Rd, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, Qingdao Ctr Resource Chem & New Mat, Qingdao 266000, Peoples R China |
Recommended Citation GB/T 7714 | Zhao, Dongpu,Zhang, Yan,Li, Zhuo,et al. Synthesis of AEI/CHA intergrowth zeolites by dual templates and their catalytic performance for dimethyl ether to olefins[J]. Chemical Engineering Journal,2017,323:295-303. |
APA | Zhao, Dongpu,Zhang, Yan,Li, Zhuo,Wang, Yan,Yu JQ,&于健强.(2017).Synthesis of AEI/CHA intergrowth zeolites by dual templates and their catalytic performance for dimethyl ether to olefins.Chemical Engineering Journal,323,295-303. |
MLA | Zhao, Dongpu,et al."Synthesis of AEI/CHA intergrowth zeolites by dual templates and their catalytic performance for dimethyl ether to olefins".Chemical Engineering Journal 323(2017):295-303. |
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