Cost-effective synthesis of CHA zeolites with controllable morphology and size

doi:10.1016/j.cej.2018.10.007

	Cost-effective synthesis of CHA zeolites with controllable morphology and size
	Guo, Ya 1,2; Sun, Tianjun 1; Liu, Xiaowei 1,2; Ke, Quanli 1,2; Wei, Xiaoli 1,2; Gu, Yiming 1,2; Wang, Shudong 1
刊名	CHEMICAL ENGINEERING JOURNAL
	2019-02-15
卷号	358 页码:331-339
关键词	CO2/CH4 adsorption separation Zeolite Dual template Morphology Size
ISSN号	1385-8947
DOI	10.1016/j.cej.2018.10.007
通讯作者	Sun, Tianjun(suntianjun@dicp.ac.cn) ; Wang, Shudong(wangsd@dicp.ac.cn)
英文摘要	Cost-effectively develop zeolites with controllable morphology and size is significant in design and optimization of the physical properties for CO2 /CH4 adsorption separation. Herein, we report the synthesis of CHA zeolites with tunable morphology and size by a facile one-step dual template-directed strategy. A mixture of organic structure-directing agents (OSDA) composed of N,N,N-trimethyl-1-adamantammonium hydroxide (TMAdaOH) and tetramethylammonium hydroxide (TMAOH) was employed and found to function cooperatively in directing the crystallization of CHA zeolites. Additionally, the dual template strategy reduced the consumption of expensive TMAdaOH to a great extent. The crystal morphology and size were remarkably dependent on TMAOH concentration in the dual template-directed synthesis system, regardless of TMAdaOH concentration. We demonstrate that the gradual decrease of TMAOH concentration in the batch composition enables a fine-tuning of the zeolite morphology from cubic to rough sphere crystals, accompanied by the size ranging from ca. 3 mu m to 400 nm. We speculate that the two organic species work synergistically in the formation of CHA crystals, where TMAdaOH is the microporous structure director, and TMAOH plays a role in bridging neighboring particles via electrostatic interactions. The variation of crystal size is confirmed to have considerable influence on CO2/CH4 separation performances. Moreover, the ability to tailor the physical properties of CHA zeolite by dual template method makes it possible to optimize the performances in other commercial applications.
资助项目	National Natural Science Foundation of China[21776266] ; National Natural Science Foundation of China[21476231]
WOS关键词	SELECTIVE CATALYTIC-REDUCTION ; DENSITY MISMATCH SYNTHESIS ; STRUCTURE DIRECTING AGENTS ; SAPO-34 MOLECULAR-SIEVES ; HYDROTHERMAL SYNTHESIS ; CRYSTAL MORPHOLOGY ; IMPROVED STABILITY ; OLEFINS REACTION ; FRAMEWORK TYPES ; SSZ-13 ZEOLITE
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000450105700032
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/166694]
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	Sun, Tianjun; Wang, Shudong
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Guo, Ya,Sun, Tianjun,Liu, Xiaowei,et al. Cost-effective synthesis of CHA zeolites with controllable morphology and size[J]. CHEMICAL ENGINEERING JOURNAL,2019,358:331-339.
APA	Guo, Ya.,Sun, Tianjun.,Liu, Xiaowei.,Ke, Quanli.,Wei, Xiaoli.,...&Wang, Shudong.(2019).Cost-effective synthesis of CHA zeolites with controllable morphology and size.CHEMICAL ENGINEERING JOURNAL,358,331-339.
MLA	Guo, Ya,et al."Cost-effective synthesis of CHA zeolites with controllable morphology and size".CHEMICAL ENGINEERING JOURNAL 358(2019):331-339.